Problemas con Kernel despues de última actualización

Saludos a todos en el foro…

Despues de la ultima actualización ninguno de los tres kernels instalados funcionó.
Agradecido por la ayuda que puedan prestar al respecto.

Lo mejor es que arranques con un USB de instalación e intentes reparar desde ahí. Abres la terminal y ejecutas:

# Entrar en tu sistema instalado:
manjaro-chroot -a

# Volver a actualizar (por si acaso)
pacman -Syu

# Volver a recrear la configuración de grub
update-grub

# información sobre particiones
lsblk -f
parted -l

Copia por aquí la salida de esos dos últimos comandos (ponlos como bloques de código poniendo ``` una línea antes y despúes del texto que copies).

Agradecido por su ayuda…
Despues de realizar todo lo que indicó el resultado fue el mismo…
A continuación el log de todo el proceso:

manjaro@manjaro-gnome Linux 5.8.16-2-MANJARO x86_64 20.1.2 Mikah
~ >>> manjaro-chroot -a                                                        
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
==> Mounting (ManjaroLinux) [/dev/sda1]
 --> mount: [/mnt]
 --> mount: [/mnt/home]
 --> mount: [/mnt/boot/efi]
[manjaro-gnome /]# pacman -Syu
:: Synchronizing package databases...
 core                  169.7 KiB   125 KiB/s 00:01 [######################] 100%
 extra                1999.0 KiB   171 KiB/s 00:12 [######################] 100%
 community               6.3 MiB   281 KiB/s 00:23 [######################] 100%
 multilib              188.6 KiB   230 KiB/s 00:01 [######################] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...

Packages (92) alsa-card-profiles-14.0-1  c-ares-1.17.1-1
              cups-2.3.3+121+g63ffc5cd7-1  cups-filters-1.28.5-3
              dconf-editor-3.38.2-1  dhcpcd-9.3.3-1  eog-3.38.1-1
              evolution-data-server-3.38.2-1  gdm-3.38.2-1.2  glibmm-2.64.4-1
              gnome-calculator-3.38.2-1  gnome-desktop-1:3.38.2-1
              gnome-getting-started-docs-3.38.0-1  gnome-maps-3.38.2-1
              gnome-user-docs-3.38.2-1  gpgme-1.15.0-1
              grub-theme-manjaro-20.2-12  hugo-0.78.2-1
              imagemagick-7.0.10.43-1  intel-ucode-20201118-1
              lib32-libjpeg-turbo-2.0.6-1  lib32-libpulse-14.0-1
              lib32-librsvg-2.50.2-1  lib32-libx11-1.7.0-1  lib32-mesa-20.2.3-1
              lib32-util-linux-2.36.1-1  libcups-2.3.3+121+g63ffc5cd7-1
              libgdm-3.38.2-1.2  libimagequant-2.13.1-1  libjpeg-turbo-2.0.6-1
              libmagick6-6.9.11.41-1  libnautilus-extension-3.38.2-1
              libpulse-14.0-1  libraqm-0.7.1-1  librsvg-2:2.50.2-1
              libsigc++-2.10.6-1  libx11-1.7.0-1  libxkbcommon-1.0.3-1
              libxkbcommon-x11-1.0.3-1  linux-firmware-20201124.r1786.b362fd4-1
              linux59-5.9.11-3  mesa-20.2.3-1  mpv-1:0.33.0-3
              nautilus-3.38.2-1  nodejs-15.3.0-1  perl-http-cookies-6.09-1
              php-7.4.13-1  php-apache-7.4.13-1  php-cgi-7.4.13-1
              php-gd-7.4.13-1  php-pgsql-7.4.13-1  pkcs11-helper-1.27.0-1
              pulseaudio-14.0-1  pulseaudio-bluetooth-14.0-1
              pulseaudio-equalizer-14.0-1  pulseaudio-jack-14.0-1
              pulseaudio-lirc-14.0-1  pulseaudio-zeroconf-14.0-1
              pyside2-5.15.2-1  python-pdftotext-2.1.5-1
              python-pikepdf-2.1.2-1  python-pyqt5-5.15.2-1
              python-pyqtwebengine-5.15.2-1  python-shiboken2-5.15.2-1
              qpdf-10.0.4-1  qt5-base-5.15.2-1  qt5-declarative-5.15.2-1
              qt5-imageformats-5.15.2-1  qt5-location-5.15.2-1
              qt5-multimedia-5.15.2-1  qt5-quickcontrols-5.15.2-1
              qt5-quickcontrols2-5.15.2-1  qt5-sensors-5.15.2-1
              qt5-speech-5.15.2-1  qt5-svg-5.15.2-1  qt5-tools-5.15.2-1
              qt5-translations-5.15.2-1  qt5-wayland-5.15.2-1
              qt5-webchannel-5.15.2-1  qt5-webengine-5.15.2-1
              qt5-webkit-5.212.0alpha4-8  qt5-x11extras-5.15.2-1
              rust-1:1.48.0-1  sdl_image-1.2.12-7
              system-config-printer-1.5.13-3  tepl-5.0.1-1  util-linux-2.36.1-3
              util-linux-libs-2.36.1-3  webkit2gtk-2.30.3-1  xorg-xprop-1.2.5-1
              yelp-3.38.2-1  yelp-xsl-3.38.2-1

Total Download Size:    561.16 MiB
Total Installed Size:  2387.70 MiB
Net Upgrade Size:        10.22 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
 util-linux-libs-...   414.3 KiB   178 KiB/s 00:02 [######################] 100%
 util-linux-2.36....     2.5 MiB   123 KiB/s 00:20 [######################] 100%
 gpgme-1.15.0-1-x...   448.8 KiB   111 KiB/s 00:04 [######################] 100%
 dhcpcd-9.3.3-1-x...   209.0 KiB   122 KiB/s 00:02 [######################] 100%
 linux-firmware-2...   137.8 MiB   163 KiB/s 14:23 [######################] 100%
 linux59-5.9.11-3...    87.7 MiB   181 KiB/s 08:17 [######################] 100%
 alsa-card-profil...    22.5 KiB   751 KiB/s 00:00 [######################] 100%
 c-ares-1.17.1-1-...   196.1 KiB   320 KiB/s 00:01 [######################] 100%
 libjpeg-turbo-2....   407.1 KiB   259 KiB/s 00:02 [######################] 100%
 libcups-2.3.3+12...   289.9 KiB   297 KiB/s 00:01 [######################] 100%
 qpdf-10.0.4-1-x86_64  976.6 KiB   172 KiB/s 00:06 [######################] 100%
 libraqm-0.7.1-1-...    28.1 KiB  1655 KiB/s 00:00 [######################] 100%
 libx11-1.7.0-1-x...     2.1 MiB   227 KiB/s 00:09 [######################] 100%
 imagemagick-7.0....     2.5 MiB   257 KiB/s 00:10 [######################] 100%
 cups-filters-1.2...   880.5 KiB   176 KiB/s 00:05 [######################] 100%
 cups-2.3.3+121+g...     5.1 MiB   158 KiB/s 00:33 [######################] 100%
 librsvg-2:2.50.2...     2.5 MiB   176 KiB/s 00:14 [######################] 100%
 perl-http-cookie...    22.3 KiB   971 KiB/s 00:00 [######################] 100%
 mesa-20.2.3-1-x86_64           16.2 MiB   217 KiB/s 01:17 [################################] 100%
 libxkbcommon-1.0.3-1-x86_64   194.8 KiB   170 KiB/s 00:01 [################################] 100%
 dconf-editor-3.38.2-1-x86_64  639.9 KiB   120 KiB/s 00:05 [################################] 100%
 gnome-desktop-1:3.38.2-1...   549.8 KiB   103 KiB/s 00:05 [################################] 100%
 eog-3.38.1-1-x86_64             3.2 MiB   110 KiB/s 00:29 [################################] 100%
 webkit2gtk-2.30.3-1-x86_64     22.1 MiB   188 KiB/s 02:00 [################################] 100%
 evolution-data-server-3....     4.6 MiB   141 KiB/s 00:33 [################################] 100%
 libgdm-3.38.2-1.2-x86_64       73.8 KiB   187 KiB/s 00:00 [################################] 100%
 libpulse-14.0-1-x86_64        396.4 KiB   187 KiB/s 00:02 [################################] 100%
 pulseaudio-14.0-1-x86_64     1216.4 KiB   221 KiB/s 00:06 [################################] 100%
 pulseaudio-bluetooth-14....    61.0 KiB   176 KiB/s 00:00 [################################] 100%
 libxkbcommon-x11-1.0.3-1...    21.7 KiB   804 KiB/s 00:00 [################################] 100%
 gdm-3.38.2-1.2-x86_64         702.9 KiB   185 KiB/s 00:04 [################################] 100%
 libsigc++-2.10.6-1-x86_64      67.4 KiB   162 KiB/s 00:00 [################################] 100%
 glibmm-2.64.4-1-x86_64       1033.0 KiB   169 KiB/s 00:06 [################################] 100%
 gnome-calculator-3.38.2-...  1714.3 KiB   112 KiB/s 00:15 [################################] 100%
 yelp-xsl-3.38.2-1-any         177.7 KiB   241 KiB/s 00:01 [################################] 100%
 yelp-3.38.2-1-x86_64          837.5 KiB   273 KiB/s 00:03 [################################] 100%
 gnome-getting-started-do...     7.3 MiB   253 KiB/s 00:30 [################################] 100%
 gnome-maps-3.38.2-1-x86_64    665.3 KiB   180 KiB/s 00:04 [################################] 100%
 gnome-user-docs-3.38.2-1-any    8.5 MiB   241 KiB/s 00:36 [################################] 100%
 grub-theme-manjaro-20.2-...   958.2 KiB   137 KiB/s 00:07 [################################] 100%
 intel-ucode-20201118-1-any      2.7 MiB   150 KiB/s 00:18 [################################] 100%
 libmagick6-6.9.11.41-1-x...     2.3 MiB   117 KiB/s 00:20 [################################] 100%
 libnautilus-extension-3....    51.0 KiB   151 KiB/s 00:00 [################################] 100%
 xorg-xprop-1.2.5-1-x86_64      26.3 KiB   158 KiB/s 00:00 [################################] 100%
 nautilus-3.38.2-1-x86_64        2.5 MiB   110 KiB/s 00:23 [################################] 100%
 php-7.4.13-1-x86_64             3.7 MiB   306 KiB/s 00:12 [################################] 100%
 php-apache-7.4.13-1-x86_64      2.5 MiB   193 KiB/s 00:13 [################################] 100%
 php-cgi-7.4.13-1-x86_64         2.5 MiB   231 KiB/s 00:11 [################################] 100%
 php-gd-7.4.13-1-x86_64         29.9 KiB   679 KiB/s 00:00 [################################] 100%
 php-pgsql-7.4.13-1-x86_64      58.2 KiB   281 KiB/s 00:00 [################################] 100%
 pkcs11-helper-1.27.0-1-x...    69.7 KiB   311 KiB/s 00:00 [################################] 100%
 qt5-base-5.15.2-1-x86_64       17.7 MiB   162 KiB/s 01:52 [################################] 100%
 python-pyqt5-5.15.2-1-x86_64    4.3 MiB   163 KiB/s 00:27 [################################] 100%
 pulseaudio-equalizer-14....    33.0 KiB   124 KiB/s 00:00 [################################] 100%
 pulseaudio-jack-14.0-1-x...    17.7 KiB  1107 KiB/s 00:00 [################################] 100%
 pulseaudio-lirc-14.0-1-x...     7.5 KiB  0.00   B/s 00:00 [################################] 100%
 pulseaudio-zeroconf-14.0...    23.2 KiB   118 KiB/s 00:00 [################################] 100%
 python-shiboken2-5.15.2-...   175.7 KiB   246 KiB/s 00:01 [################################] 100%
 qt5-declarative-5.15.2-1...     4.8 MiB   106 KiB/s 00:47 [################################] 100%
 pyside2-5.15.2-1-x86_64         8.7 MiB   118 KiB/s 01:15 [################################] 100%
 qt5-webchannel-5.15.2-1-...    72.6 KiB  79.8 KiB/s 00:01 [################################] 100%
 qt5-location-5.15.2-1-x86_64    2.9 MiB   114 KiB/s 00:26 [################################] 100%
 qt5-webengine-5.15.2-1-x...    45.7 MiB   179 KiB/s 04:21 [################################] 100%
 python-pyqtwebengine-5.1...   118.8 KiB   517 KiB/s 00:00 [################################] 100%
 qt5-imageformats-5.15.2-...    52.8 KiB   243 KiB/s 00:00 [################################] 100%
 qt5-multimedia-5.15.2-1-...   795.3 KiB   416 KiB/s 00:02 [################################] 100%
 qt5-quickcontrols-5.15.2...   932.2 KiB   397 KiB/s 00:02 [################################] 100%
 qt5-quickcontrols2-5.15....  1559.3 KiB   317 KiB/s 00:05 [################################] 100%
 qt5-sensors-5.15.2-1-x86_64   177.4 KiB   194 KiB/s 00:01 [################################] 100%
 qt5-speech-5.15.2-1-x86_64     48.0 KiB   221 KiB/s 00:00 [################################] 100%
 qt5-svg-5.15.2-1-x86_64       146.6 KiB   232 KiB/s 00:01 [################################] 100%
 qt5-tools-5.15.2-1-x86_64       5.3 MiB   102 KiB/s 00:53 [################################] 100%
 qt5-translations-5.15.2-...  1697.4 KiB   217 KiB/s 00:08 [################################] 100%
 qt5-wayland-5.15.2-1-x86_64  1107.3 KiB   348 KiB/s 00:03 [################################] 100%
 qt5-webkit-5.212.0alpha4...    12.2 MiB   141 KiB/s 01:28 [################################] 100%
 qt5-x11extras-5.15.2-1-x...    14.5 KiB  1449 KiB/s 00:00 [################################] 100%
 rust-1:1.48.0-1-x86_64         80.3 MiB   119 KiB/s 11:32 [################################] 100%
 sdl_image-1.2.12-7-x86_64      28.5 KiB   145 KiB/s 00:00 [################################] 100%
 system-config-printer-1....  1072.2 KiB   149 KiB/s 00:07 [################################] 100%
 tepl-5.0.1-1-x86_64           186.5 KiB   201 KiB/s 00:01 [################################] 100%
 hugo-0.78.2-1-x86_64           12.5 MiB   104 KiB/s 02:04 [################################] 100%
 libimagequant-2.13.1-1-x...    43.1 KiB   559 KiB/s 00:00 [################################] 100%
 mpv-1:0.33.0-3-x86_64        1391.6 KiB   145 KiB/s 00:10 [################################] 100%
error: failed retrieving file 'nodejs-15.3.0-1-x86_64.pkg.tar.zst' from mirror.ufro.cl : Operation too slow. Less than 1 bytes/sec transferred the last 10 seconds
 nodejs-15.3.0-1-x86_64          6.5 MiB   265 KiB/s 00:25 [################################] 100%
 python-pdftotext-2.1.5-1...     9.2 KiB  0.00   B/s 00:00 [################################] 100%
 python-pikepdf-2.1.2-1-x...   391.3 KiB   244 KiB/s 00:02 [################################] 100%
 lib32-libjpeg-turbo-2.0....   181.7 KiB   173 KiB/s 00:01 [################################] 100%
 lib32-util-linux-2.36.1-...   436.8 KiB  37.3 KiB/s 00:12 [################################] 100%
 lib32-libx11-1.7.0-1-x86_64   649.0 KiB  45.2 KiB/s 00:14 [################################] 100%
 lib32-libpulse-14.0-1-x86_64  280.8 KiB  44.9 KiB/s 00:06 [################################] 100%
 lib32-librsvg-2.50.2-1-x...     2.5 MiB  99.7 KiB/s 00:26 [################################] 100%
 lib32-mesa-20.2.3-1-x86_64     13.2 MiB   123 KiB/s 01:49 [################################] 100%
(92/92) checking keys in keyring                           [################################] 100%
(92/92) checking package integrity                         [################################] 100%
(92/92) loading package files                              [################################] 100%
(92/92) checking for file conflicts                        [################################] 100%
(92/92) checking available disk space                      [################################] 100%
:: Running pre-transaction hooks...
(1/2) Removing linux initcpios...
(2/2) Save Linux kernel modules
:: Processing package changes...
( 1/92) upgrading alsa-card-profiles                       [################################] 100%
( 2/92) upgrading c-ares                                   [################################] 100%
( 3/92) upgrading util-linux-libs                          [################################] 100%
( 4/92) upgrading libjpeg-turbo                            [################################] 100%
( 5/92) upgrading libcups                                  [################################] 100%
( 6/92) upgrading qpdf                                     [################################] 100%
( 7/92) upgrading libraqm                                  [################################] 100%
( 8/92) upgrading libx11                                   [################################] 100%
( 9/92) upgrading imagemagick                              [################################] 100%
(10/92) upgrading util-linux                               [################################] 100%
(11/92) upgrading cups-filters                             [################################] 100%
(12/92) upgrading cups                                     [################################] 100%
>>> Cups systemd socket and service files have been
>>> renamed by upstream decision. Please make sure
>>> to disable/reenable the services to your need.
>>> hint: "pacman -Ql cups | grep systemd" and
>>> "ls -lR /etc/systemd/ | grep cups" 
(13/92) upgrading librsvg                                  [################################] 100%
(14/92) upgrading perl-http-cookies                        [################################] 100%
(15/92) upgrading gpgme                                    [################################] 100%
(16/92) upgrading mesa                                     [################################] 100%
(17/92) upgrading libxkbcommon                             [################################] 100%
(18/92) upgrading dconf-editor                             [################################] 100%
(19/92) upgrading dhcpcd                                   [################################] 100%
(20/92) upgrading gnome-desktop                            [################################] 100%
(21/92) upgrading eog                                      [################################] 100%
(22/92) upgrading webkit2gtk                               [################################] 100%
(23/92) upgrading evolution-data-server                    [################################] 100%
(24/92) upgrading libgdm                                   [################################] 100%
(25/92) upgrading libpulse                                 [################################] 100%
(26/92) upgrading pulseaudio                               [################################] 100%
(27/92) upgrading pulseaudio-bluetooth                     [################################] 100%
(28/92) upgrading libxkbcommon-x11                         [################################] 100%
(29/92) upgrading gdm                                      [################################] 100%
warning: directory permissions differ on /var/lib/gdm/.local/
filesystem: 755  package: 700
(30/92) upgrading libsigc++                                [################################] 100%
(31/92) upgrading glibmm                                   [################################] 100%
(32/92) upgrading gnome-calculator                         [################################] 100%
(33/92) upgrading yelp-xsl                                 [################################] 100%
(34/92) upgrading yelp                                     [################################] 100%
(35/92) upgrading gnome-getting-started-docs               [################################] 100%
(36/92) upgrading gnome-maps                               [################################] 100%
(37/92) upgrading gnome-user-docs                          [################################] 100%
(38/92) upgrading grub-theme-manjaro                       [################################] 100%
(39/92) upgrading hugo                                     [################################] 100%
(40/92) upgrading intel-ucode                              [################################] 100%
(41/92) upgrading lib32-libjpeg-turbo                      [################################] 100%
(42/92) upgrading lib32-util-linux                         [################################] 100%
(43/92) upgrading lib32-libx11                             [################################] 100%
(44/92) upgrading lib32-libpulse                           [################################] 100%
(45/92) upgrading lib32-librsvg                            [################################] 100%
(46/92) upgrading lib32-mesa                               [################################] 100%
(47/92) upgrading libimagequant                            [################################] 100%
(48/92) upgrading libmagick6                               [################################] 100%
(49/92) upgrading libnautilus-extension                    [################################] 100%
(50/92) upgrading linux-firmware                           [################################] 100%
(51/92) upgrading linux59                                  [################################] 100%
(52/92) upgrading xorg-xprop                               [################################] 100%
(53/92) upgrading mpv                                      [################################] 100%
(54/92) upgrading nautilus                                 [################################] 100%
(55/92) upgrading nodejs                                   [################################] 100%
(56/92) upgrading php                                      [################################] 100%
(57/92) upgrading php-apache                               [################################] 100%
(58/92) upgrading php-cgi                                  [################################] 100%
(59/92) upgrading php-gd                                   [################################] 100%
(60/92) upgrading php-pgsql                                [################################] 100%
(61/92) upgrading pkcs11-helper                            [################################] 100%
(62/92) upgrading qt5-base                                 [################################] 100%
(63/92) upgrading python-pyqt5                             [################################] 100%
(64/92) upgrading pulseaudio-equalizer                     [################################] 100%
(65/92) upgrading pulseaudio-jack                          [################################] 100%
(66/92) upgrading pulseaudio-lirc                          [################################] 100%
(67/92) upgrading pulseaudio-zeroconf                      [################################] 100%
(68/92) upgrading python-shiboken2                         [################################] 100%
(69/92) upgrading qt5-declarative                          [################################] 100%
(70/92) upgrading pyside2                                  [################################] 100%
(71/92) upgrading python-pdftotext                         [################################] 100%
(72/92) upgrading python-pikepdf                           [################################] 100%
(73/92) upgrading qt5-webchannel                           [################################] 100%
(74/92) upgrading qt5-location                             [################################] 100%
(75/92) upgrading qt5-webengine                            [################################] 100%
(76/92) upgrading python-pyqtwebengine                     [################################] 100%
(77/92) upgrading qt5-imageformats                         [################################] 100%
(78/92) upgrading qt5-multimedia                           [################################] 100%
(79/92) upgrading qt5-quickcontrols                        [################################] 100%
(80/92) upgrading qt5-quickcontrols2                       [################################] 100%
(81/92) upgrading qt5-sensors                              [################################] 100%
(82/92) upgrading qt5-speech                               [################################] 100%
(83/92) upgrading qt5-svg                                  [################################] 100%
(84/92) upgrading qt5-tools                                [################################] 100%
(85/92) upgrading qt5-translations                         [################################] 100%
(86/92) upgrading qt5-wayland                              [################################] 100%
(87/92) upgrading qt5-webkit                               [################################] 100%
(88/92) upgrading qt5-x11extras                            [################################] 100%
(89/92) upgrading rust                                     [################################] 100%
(90/92) upgrading sdl_image                                [################################] 100%
(91/92) upgrading system-config-printer                    [################################] 100%
(92/92) upgrading tepl                                     [################################] 100%
:: Running post-transaction hooks...
( 1/19) Creating system user accounts...
( 2/19) Reloading system manager configuration...
  Skipped: Current root is not booted.
( 3/19) Creating temporary files...
Failed to open file "/sys/devices/system/cpu/microcode/reload": Read-only file system
error: command failed to execute correctly
( 4/19) Reloading device manager configuration...
  Skipped: Device manager is not running.
( 5/19) Arming ConditionNeedsUpdate...
( 6/19) Updating module dependencies...
( 7/19) Updating linux initcpios...
==> Building image from preset: /etc/mkinitcpio.d/linux59.preset: 'default'
  -> -k /boot/vmlinuz-5.9-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.9-x86_64.img
==> Starting build: 5.9.11-3-MANJARO
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [autodetect]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-5.9-x86_64.img
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux59.preset: 'fallback'
  -> -k /boot/vmlinuz-5.9-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.9-x86_64-fallback.img -S autodetect
==> Starting build: 5.9.11-3-MANJARO
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-5.9-x86_64-fallback.img
==> Image generation successful
( 8/19) Updating Grub-Bootmenu
Generating grub configuration file ...
Found theme: /boot/grub/themes/Vimix/theme.txt
Found linux image: /boot/vmlinuz-5.9-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.9-x86_64.img
Found initrd fallback image: /boot/initramfs-5.9-x86_64-fallback.img
Found linux image: /boot/vmlinuz-5.8-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.8-x86_64.img
Found initrd fallback image: /boot/initramfs-5.8-x86_64-fallback.img
Found linux image: /boot/vmlinuz-5.7-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.7-x86_64.img
Found initrd fallback image: /boot/initramfs-5.7-x86_64-fallback.img
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
Found memtest86+ image: /boot/memtest86+/memtest.bin
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 272
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
error: command failed to execute correctly
( 9/19) Apply adwaita-maia override
/usr/share/applications/org.gnome.Totem.desktop
/usr/share/applications/eog.desktop
/usr/share/applications/celluloid.desktop
/usr/share/applications/shotwell.desktop
/usr/share/applications/org.gnome.gthumb.desktop
(10/19) Reloading system bus configuration...
  Skipped: Current root is not booted.
(11/19) Warn about old perl modules
(12/19) Probing GDK-Pixbuf loader modules...
(13/19) Probing 32-bit GDK-Pixbuf loader modules...
(14/19) Compiling GSettings XML schema files...
(15/19) Updating icon theme caches...
(16/19) Restore Linux kernel modules
ls: cannot access 'backup': No such file or directory

==> Warning:
	 -> Kernel has been updated. Modules of the current kernel
	 -> have been backed up so you can continue to use your
	 -> computer. However, the new kernel will only work 
	 -> at next boot.
	
	
(17/19) Hiding redundant menu entries
(18/19) Updating the info directory file...
(19/19) Updating the desktop file MIME type cache...

[manjaro-gnome /]# update-grub
Generating grub configuration file ...
Found theme: /boot/grub/themes/Vimix/theme.txt
Found linux image: /boot/vmlinuz-5.9-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.9-x86_64.img
Found initrd fallback image: /boot/initramfs-5.9-x86_64-fallback.img
Found linux image: /boot/vmlinuz-5.8-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.8-x86_64.img
Found initrd fallback image: /boot/initramfs-5.8-x86_64-fallback.img
Found linux image: /boot/vmlinuz-5.7-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.7-x86_64.img
Found initrd fallback image: /boot/initramfs-5.7-x86_64-fallback.img
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
Found memtest86+ image: /boot/memtest86+/memtest.bin
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 272
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.

[manjaro-gnome /]# lsblk -f
NAME   FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT
loop0                                         
loop1                                         
loop2                                         
loop3                                         
sda                                           
|-sda1                           82.9G    23% /
|-sda2                          170.9G    59% /home
|-sda3                                        
|-sda4                           70.9M    26% /boot/efi
|-sda5                                        
|-sda6                                        
`-sda7                                        
sdb                                           
`-sdb1                                        
sdc                                           
|-sdc1                                        
`-sdc2                                        
sr0      


[manjaro-gnome /]# parted -l
Model: ATA MTFDDAK1T0MBF (scsi)
Disk /dev/sda: 1024GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name                          Flags
 1      17.4kB  126GB   126GB   ext4
 2      126GB   650GB   524GB   ext4
 3      650GB   651GB   523MB   ntfs         Basic data partition          hidden, diag
 4      651GB   651GB   105MB   fat32        EFI system partition          boot, esp
 5      651GB   651GB   16.8MB               Microsoft reserved partition  msftres
 6      651GB   1024GB  373GB   ntfs         Basic data partition          msftdata
 7      1024GB  1024GB  565MB   ntfs                                       hidden, diag


Model: ATA ST3200822AS (scsi)
Disk /dev/sdb: 200GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End    Size   Type     File system  Flags
 1      1049kB  200GB  200GB  primary  ntfs


Model: Sony Storage Media (scsi)
Disk /dev/sdc: 8053MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 2      1946MB  1950MB  4194kB  primary               esp

El kernel linux59-5.9.11-3 simplemente intenta arrancar y se detiene, los otros dos dan el fallo de la foto superior, mientras que la instalación de Windows 10 inicia correctamente.

Alguna otra sugerencia sera enormemente bienvenida ya que es mi instalación principal y de uso permanente en mi trabajo diario.

Puede leer el registro de arranque usando

journalctl -b | grep kernel | grep load

También pruebe Desintalando los Kernel antiguos 5.7 y 5.8 luego puede reinstalar el ultimo estable
sudo mhwd-kernel -r linux59
sudo mhwd-kernel -i linux59

Ante todo muy agradecido por la ayuda oportuna…

El problema termino resuelto instalando el kernel 5.4 despues de desinstalar el 5.7, los kernels 5.8 y 5.9 no se pudieron desinstalar ni si quiera por el Gestor de Configuración de Manjaro una vez iniciado correctamente el SO.
Esto no es la primera vez que sucede, ya van tres ocasiones y al intentar desinstalar el último kernel instalado automáticamente en una actualización de Manjaro. Solo después de varias actualizaciones continuas es cuando permite eliminarlos.

Reitero mi más sincero agradecimiento a cfinnberg y a pablomhr por su apoyo… se valora un montón.

Tema resuelto.

Editado: No había visto tu último comentario. Lo dejo aquí de todas formas, pero evidentemente ya no hay que hacer nada

Comentario original:

Grub te está dando un error. Me podría parecer que usas o has usado grub-customizer o que tienes hecha alguna personalización al grub. Suelen dar problemas si no sabes bien lo que haces

Voy a darte las intrucciones para reinstalar grub y quitar cualquier personalización. Hazlo solo si tu no has hecho cambios al grub (o no te importa perder los cambios). De nuevo tienes que arrancar desde un USB y abrir la terminal:

# Entrar a tu sistema instalado
manjaro-chroot -a

# Desinstalar grub-customizer
pacman -Rcns grub-customizer

# Borrar todas las configuraciones de grub:
rm /etc/default/grub
rm /etc/grub.d/*

# Reinstalar grub
pacman -S grub

# Volver a crear la configuración de grub
update-grub

Ya dirás

Saludos… El error del GRUB es que agrega una linea antes de la últina con un “fi” invalido cuando se usa grub-customizer…

**fi**
### END /etc/grub.d/60_memtest86+_proxy ###

De todas formas muchas gracias por la información siempre será valiosa.