Update Kernel 515 doesn't finish

Today got the message to update pipewire and linux 515. I started this using pamac GUI. Now its running since more than 15 Minutes without any progress in Post-Transaction-Hooks 4/5:

Vorbereitung...
Synchronisiere Paketdatenbanken...
Aktualisierung von AUR...
Warnung: libreoffice-fresh-rpm: ignoriere Paket-Upgrade (6.4.7-2 => 7.4.1-1)
Abhängigkeiten werden aufgelöst...
Interne Konflikte werden überprüft...
Herunterladen von lib32-libpipewire (1:0.3.70-0) gestartet
Herunterladen von libpipewire (1:0.3.70-0) gestartet
Herunterladen von lib32-libpipewire (1:0.3.70-0) beendet
Herunterladen von grub-theme-manjaro (20.2-15) gestartet
Herunterladen von libpipewire (1:0.3.70-0) beendet
Herunterladen von grub-theme-manjaro (20.2-15) beendet
Herunterladen von pipewire (1:0.3.70-0) gestartet
Herunterladen von lib32-pipewire (1:0.3.70-0) gestartet
Herunterladen von lib32-pipewire (1:0.3.70-0) beendet
Herunterladen von linux510 (5.10.178-1) gestartet
Herunterladen von pipewire (1:0.3.70-0) beendet
Herunterladen von linux510-virtualbox-host-modules (7.0.6-21) gestartet
Herunterladen von linux510-virtualbox-host-modules (7.0.6-21) beendet
Herunterladen von linux515 (5.15.108-1) gestartet
Herunterladen von linux510 (5.10.178-1) beendet
Herunterladen von linux515-virtualbox-host-modules (7.0.6-24) gestartet
Herunterladen von linux515-virtualbox-host-modules (7.0.6-24) beendet
Herunterladen von linux54 (5.4.241-1) gestartet
Herunterladen von linux515 (5.15.108-1) beendet
Herunterladen von linux54-virtualbox-host-modules (7.0.6-17) gestartet
Herunterladen von linux54-virtualbox-host-modules (7.0.6-17) beendet
Herunterladen von linux54 (5.4.241-1) beendet
Überprüfe Schlüsselring...
Integrität wird überprüft...
Paketdateien werden geladen...
Dateikonflikte werden überprüft...
Überprüfe verfügbaren Speicherplatz...
Starte Pre-Transaction-Hooks...
Removing linux initcpios...
Save Linux kernel modules
Erneuere grub-theme-manjaro (20.2-13 -> 20.2-15)...
Erneuere libpipewire (1:0.3.68-1 -> 1:0.3.70-0)...
Erneuere lib32-libpipewire (1:0.3.68-1 -> 1:0.3.70-0)...
Erneuere pipewire (1:0.3.68-1 -> 1:0.3.70-0)...
Erneuere lib32-pipewire (1:0.3.68-1 -> 1:0.3.70-0)...
Erneuere linux510 (5.10.177-1 -> 5.10.178-1)...
Erneuere linux510-virtualbox-host-modules (7.0.6-20 -> 7.0.6-21)...
In order to use the new version, reload all virtualbox modules manually.
Erneuere linux515 (5.15.106-1 -> 5.15.108-1)...
Erneuere linux515-virtualbox-host-modules (7.0.6-22 -> 7.0.6-24)...
In order to use the new version, reload all virtualbox modules manually.
Erneuere linux54 (5.4.240-1 -> 5.4.241-1)...
Erneuere linux54-virtualbox-host-modules (7.0.6-16 -> 7.0.6-17)...
In order to use the new version, reload all virtualbox modules manually.
Starte Post-Transaction-Hooks...
Arming ConditionNeedsUpdate...
Updating module dependencies...
Updating linux initcpios...
==> Building image from preset: /etc/mkinitcpio.d/linux510.preset: 'default'
  -> -k /boot/vmlinuz-5.10-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.10-x86_64.img
==> Starting build: '5.10.178-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.10-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux510.preset: 'fallback'
  -> -k /boot/vmlinuz-5.10-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.10-x86_64-fallback.img -S autodetect
==> Starting build: '5.10.178-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.10-x86_64-fallback.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'default'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64.img
==> Starting build: '5.15.108-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.15-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'fallback'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64-fallback.img -S autodetect
==> Starting build: '5.15.108-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.15-x86_64-fallback.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux54.preset: 'default'
  -> -k /boot/vmlinuz-5.4-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.4-x86_64.img
==> Starting build: '5.4.241-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.4-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux54.preset: 'fallback'
  -> -k /boot/vmlinuz-5.4-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.4-x86_64-fallback.img -S autodetect
==> Starting build: '5.4.241-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.4-x86_64-fallback.img'
==> Image generation successful
Updating Grub-Bootmenu
GRUB-Konfigurationsdatei wird erstellt …
Thema gefunden: /usr/share/grub/themes/manjaro/theme.txt
Linux-Abbild gefunden: /boot/vmlinuz-5.15-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.10-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.10-x86_64.img
Found initrd fallback image: /boot/initramfs-5.10-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.4-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.4-x86_64.img
Found initrd fallback image: /boot/initramfs-5.4-x86_64-fallback.img
Warnung: Zur Erkennung anderer bootfähiger Partitionen wird os-prober ausgeführt.
Dessen Ausgabe wird zur Erkennung bootfähiger Programmdateien und Erzeugen neuer Boot-Einträge verwendet.

Now what?

Contrary to post title the kernel update did finish, initramfs were built for multiple kernels and it looks fine to me.
If the output correlates to your problem grub’s os-prober seems to stall.
If you don’t need it (no other operating systems on the machine), disable it in /etc/default/grub.
Try killing the os-prober process to let the update finish and re-generate your grub.cfg afterwards:

$ sudo update-grub

Friendly reminder: do not reboot or power off your machine until this is solved as grub.cfg is kinda important for booting up again.

Can you post fdisk -l or blkid ?

Thank you, first your request:

$ sudo fdisk -l or blkid
fdisk: or kann nicht geöffnet werden: Datei oder Verzeichnis nicht gefunden
fdisk: blkid kann nicht geöffnet werden: Datei oder Verzeichnis nicht gefunden

and

f sudo fdisk -l
Festplatte /dev/nvme0n1: 1,82 TiB, 2000398934016 Bytes, 3907029168 Sektoren
Festplattenmodell: Samsung SSD 970 EVO Plus 2TB            
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes
E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes
Festplattenbezeichnungstyp: gpt
Festplattenbezeichner: A848537D-B25C-A346-881C-D1AA4A1BBCC3

Gerät              Anfang       Ende   Sektoren Größe Typ
/dev/nvme0n1p1       2048    1050623    1048576  512M EFI-System
/dev/nvme0n1p2    1050624  135268351  134217728   64G Linux Swap
/dev/nvme0n1p3  135268352  202377215   67108864   32G Linux-Dateisystem
/dev/nvme0n1p4  202377216  269486079   67108864   32G Linux-Dateisystem
/dev/nvme0n1p5  269486080  898631679  629145600  300G Linux-Dateisystem
/dev/nvme0n1p6  898631680 1318062079  419430400  200G Linux-Dateisystem
/dev/nvme0n1p7 1318062080 3907028991 2588966912  1,2T Linux-Dateisystem


Festplatte /dev/sda: 14,55 TiB, 16000900661248 Bytes, 31251759104 Sektoren
Festplattenmodell: My Book 25ED    
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 4096 Bytes
E/A-Größe (minimal/optimal): 4096 Bytes / 4096 Bytes
Festplattenbezeichnungstyp: gpt
Festplattenbezeichner:#######

Gerät      Anfang        Ende    Sektoren Größe Typ
/dev/sda1    2048 31251757055 31251755008 14,6T Linux-Dateisystem

and

$ blkid
/dev/nvme0n1p7: LABEL="Daten" UUID="##### BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="Daten" PARTUUID="#####"
/dev/nvme0n1p5: LABEL="Virtual" UUID="##### BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="Virtual" PARTUUID="#####"
/dev/nvme0n1p3: LABEL="Manjaro" UUID="#####" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="Manjaro" PARTUUID="#####"
/dev/nvme0n1p1: LABEL_FATBOOT="UEFI-ESP" LABEL="UEFI-ESP" UUID="F8E8-132F" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="UEFI-ESP" PARTUUID="#####"
/dev/nvme0n1p6: LABEL="TimeShift" UUID="#####" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="TimeShift" PARTUUID="#####"
/dev/nvme0n1p4: LABEL="home" UUID="#####" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="home" PARTUUID="#####"
/dev/nvme0n1p2: LABEL="Swap" UUID="#####" TYPE="swap" PARTLABEL="Swap" PARTUUID="#####"
/dev/sda1: LABEL="myBook16" UUID="#####" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="myBook16" PARTUUID="#####"

Hope, this is close to what you’d like to see …

is it still stuck?
if yes, cancel it, and rerun it again:

sudo pacman-mirrors --fasttrack 5 && sudo pacman -Syyu

If the above command tells you that there’s nothing to do, I would still regenerate the initramfs and grub:

sudo mkinitcpio -P
sudo update-grub

Thank you!
@brahma: pamac-GUI is still running, the close-X does nothing. The screen from here did not change.

@mithrial: I fired this:

$ sudo mkinitcpio -P
==> Building image from preset: /etc/mkinitcpio.d/linux510.preset: 'default'
  -> -k /boot/vmlinuz-5.10-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.10-x86_64.img
==> Starting build: '5.10.178-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.10-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux510.preset: 'fallback'
  -> -k /boot/vmlinuz-5.10-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.10-x86_64-fallback.img -S autodetect
==> Starting build: '5.10.178-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.10-x86_64-fallback.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'default'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64.img
==> Starting build: '5.15.108-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.15-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'fallback'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64-fallback.img -S autodetect
==> Starting build: '5.15.108-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.15-x86_64-fallback.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux54.preset: 'default'
  -> -k /boot/vmlinuz-5.4-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.4-x86_64.img
==> Starting build: '5.4.241-1-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: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.4-x86_64.img'
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux54.preset: 'fallback'
  -> -k /boot/vmlinuz-5.4-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.4-x86_64-fallback.img -S autodetect
==> Starting build: '5.4.241-1-MANJARO'
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [modconf]
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: 'qed'
==> WARNING: Possibly missing firmware for module: 'bfa'
==> WARNING: Possibly missing firmware for module: 'qla2xxx'
==> WARNING: Possibly missing firmware for module: 'qla1280'
  -> Running build hook: [keyboard]
  -> Running build hook: [keymap]
  -> Running build hook: [resume]
  -> Running build hook: [filesystems]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: '/boot/initramfs-5.4-x86_64-fallback.img'
==> Image generation successful

But pamac-GUI is still as decribed above answering @brahma.
What are my next steps?

How about update-gub?

Now this:

$ sudo update-grub
GRUB-Konfigurationsdatei wird erstellt …
Thema gefunden: /usr/share/grub/themes/manjaro/theme.txt
Linux-Abbild gefunden: /boot/vmlinuz-5.15-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.10-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.10-x86_64.img
Found initrd fallback image: /boot/initramfs-5.10-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.4-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.4-x86_64.img
Found initrd fallback image: /boot/initramfs-5.4-x86_64-fallback.img
Warnung: Zur Erkennung anderer bootfähiger Partitionen wird os-prober ausgeführt.
Dessen Ausgabe wird zur Erkennung bootfähiger Programmdateien und Erzeugen neuer Boot-Einträge verwendet.
rmdir: konnte '/var/lib/os-prober/mount' nicht entfernen: Das Gerät oder die Ressource ist belegt
rmdir: konnte '/var/lib/os-prober/mount' nicht entfernen: Das Gerät oder die Ressource ist belegt
rmdir: konnte '/var/lib/os-prober/mount' nicht entfernen: Das Gerät oder die Ressource ist belegt
rmdir: konnte '/var/lib/os-prober/mount' nicht entfernen: Das Gerät oder die Ressource ist belegt
Bootmenü-Eintrag für UEFI-Firmware-Einstellungen wird hinzugefügt …
Found memtest86+ image: /boot/memtest86+/memtest.bin
/usr/bin/grub-probe: Warnung: Unbekannter Gerätetyp nvme0n1.
abgeschlossen

My guess: The USB-drive

/dev/sda1: LABEL="myBook16" UUID="#####" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="myBook16"

may be the problem. It started running (noise) after $ sudo update-grub. The drive is connected, but not mounted:

 sudo umount /media/myBook16/
umount: /media/myBook16/: is not mounted.

@freggel.doe mentioned os-prober …
What’s next?

Do you actually need os-prober?

If you’re familiar with chroot and live USB, I would try a reboot. However, it might be dangerous

You have no Windows installation: you can disable os-prober in /etc/default/grub.

I modified /etc/default/grub:

# Uncomment this option to enable os-prober execution in the grub-mkconfig command
# GRUB_DISABLE_OS_PROBER=false
GRUB_DISABLE_OS_PROBER=true

and

$ sudo update-grub
GRUB-Konfigurationsdatei wird erstellt …
Thema gefunden: /usr/share/grub/themes/manjaro/theme.txt
Linux-Abbild gefunden: /boot/vmlinuz-5.15-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.10-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.10-x86_64.img
Found initrd fallback image: /boot/initramfs-5.10-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.4-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.4-x86_64.img
Found initrd fallback image: /boot/initramfs-5.4-x86_64-fallback.img
Warnung: Zur Erkennung anderer bootfähiger Partitionen wird os-prober nicht ausgeführt.
Die darauf befindlichen Systeme werden nicht zur GRUB-Bootkonfiguration hinzugefügt.
Schauen Sie in den Dokumentationseintrag GRUB_DISABLE_OS_PROBER.
Bootmenü-Eintrag für UEFI-Firmware-Einstellungen wird hinzugefügt …
Found memtest86+ image: /boot/memtest86+/memtest.bin
/usr/bin/grub-probe: Warnung: Unbekannter Gerätetyp nvme0n1.
abgeschlossen

Then I tried to kill the os_process to let the update finalize, as described here


There were three, I stopped all three, now I have:

Pamac-GUI stiill looks as before, I can’t close “X” it. Should I stopp also the 30_os-prober?

Try to kill os-prober.

What do you mean, the actual os-prober processes are shown here Shall I kill 30_os-prober?

I disabled it, ref. below. Reboot worked. I change /etc/default/grub back to what I had. Reboot worked too.
Thanks everybody for the support!

grub-mount needs to be killed at that point in time in order to continue.

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