Blank screen after backlight@.service

[ar_0]

Below the output of the inxi -Fxxxz command:

System:
  Kernel: 5.6.19-2-MANJARO x86_64 bits: 64 compiler: gcc 
  v: 10.1.0 Desktop: i3 4.18.2 info: i3bar dm: LightDM 1.30.0 
  Distro: Manjaro Linux 
Machine:
  Type: Laptop System: ASUSTeK 
  product: VivoBook_ASUSLaptop X521IA_M533IA v: 1.0 
  serial: <filter> 
  Mobo: ASUSTeK model: X521IA v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: X521IA.300 date: 04/13/2020 
Battery:
  ID-1: BAT0 charge: 45.2 Wh condition: 50.9/50.0 Wh (102%) 
  volts: 11.9/11.9 model: ASUSTeK ASUS Battery type: Li-ion 
  serial: N/A status: Discharging cycles: 6 
CPU:
  Topology: 8-Core 
  model: AMD Ryzen 7 4700U with Radeon Graphics bits: 64 
  type: MCP arch: Zen rev: 1 L2 cache: 4096 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a 
  ssse3 svm 
  bogomips: 31952 
  Speed: 1397 MHz min/max: 1400/2000 MHz boost: enabled 
  Core speeds (MHz): 1: 1397 2: 1397 3: 1397 4: 1397 5: 1397 
  6: 1397 7: 1397 8: 1397 
Graphics:
  Device-1: AMD Renoir vendor: ASUSTeK driver: amdgpu v: kernel 
  bus ID: 03:00.0 chip ID: 1002:1636 
  Device-2: IMC Networks USB2.0 HD UVC WebCam type: USB 
  driver: uvcvideo bus ID: 3-3:3 chip ID: 13d3:56a2 
  serial: <filter> 
  Display: x11 server: X.Org 1.20.8 driver: amdgpu,ati 
  unloaded: modesetting alternate: fbdev,vesa 
  resolution: 1920x1080~60Hz s-dpi: 96 
  OpenGL: 
  renderer: AMD RENOIR (DRM 3.36.0 5.6.19-2-MANJARO LLVM 10.0.1) 
  v: 4.6 Mesa 20.1.5 direct render: Yes 
Audio:
  Device-1: AMD driver: snd_hda_intel v: kernel bus ID: 03:00.1 
  chip ID: 1002:1637 
  Device-2: AMD Family 17h HD Audio vendor: ASUSTeK 
  driver: snd_hda_intel v: kernel bus ID: 03:00.6 
  chip ID: 1022:15e3 
  Sound Server: ALSA v: k5.6.19-2-MANJARO 
Network:
  Device-1: Realtek RTL8821CE 802.11ac PCIe Wireless Network 
  Adapter 
  vendor: AzureWave driver: rtl8821ce v: N/A port: f000 
  bus ID: 01:00.0 chip ID: 10ec:c821 
  IF: wlp1s0 state: up mac: <filter> 
Drives:
  Local Storage: total: 476.94 GiB used: 24.61 GiB (5.2%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLQ512HALU-00000 
  size: 476.94 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> 
  rev: FXV7000Q scheme: GPT 
Partition:
ID-1: / size: 459.50 GiB used: 24.61 GiB (5.4%) fs: ext4 
  dev: /dev/nvme0n1p2 
Swap:
  ID-1: swap-1 type: partition size: 8.80 GiB 
  used: 0 KiB (0.0%) priority: -2 dev: /dev/nvme0n1p3 
Sensors:
  System Temperatures: cpu: 39.0 C mobo: N/A gpu: amdgpu 
  temp: 38 C 
  Fan Speeds (RPM): cpu: 0 
Info:
  Processes: 227 Uptime: 1h 01m Memory: 15.13 GiB 
  used: 1.45 GiB (9.6%) Init: systemd v: 245 Compilers: 
  gcc: 10.1.0 Packages: pacman: 978 Shell: Zsh v: 5.8 
  running in: termite inxi: 3.1.05

Thanks in advance.

[stephane]

can you add these kernels

sudo mhwd-kernel -i linux57
sudo mhwd-kernel -i linux58

reboot , press Esc for appears Grub
and choose in detail version kernel 5.8

minima kernel will be 5.7 for your motherboard & video
& firmware

you can remove after 5.6 ( End Of Life no more update )

sudo mhwd-kernel -r linux56

[ar_0]

After installed the kernels you suggested, I’ve rebooted the pc and chosen the linux58 kernel.
However the login screen has never shown up. So I’ve digited ctrl + alt + F2, rebooted the pc and then chosen linux56 and all worked as expected.

[stephane]

can you return

sudo cat /etc/default/grub

[ar_0]

GRUB_DEFAULT=saved
GRUB_TIMEOUT=10
GRUB_TIMEOUT_STYLE=hidden
GRUB_DISTRIBUTOR="Manjaro"
GRUB_CMDLINE_LINUX_DEFAULT="quiet resume=UUID=39e35c53-46df-4d4d-ae8d-489efbecdbb0 udev.log_priority=3"
GRUB_CMDLINE_LINUX=""

# If you want to enable the save default function, uncomment the following
# line, and set GRUB_DEFAULT to saved.
GRUB_SAVEDEFAULT=true

# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"

# Uncomment to enable booting from LUKS encrypted devices
#GRUB_ENABLE_CRYPTODISK=y

# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console

# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command 'videoinfo'
GRUB_GFXMODE=auto

# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep

# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true

# Uncomment and set to the desired menu colors.  Used by normal and wallpaper
# modes only.  Entries specified as foreground/background.
GRUB_COLOR_NORMAL="light-gray/black"
GRUB_COLOR_HIGHLIGHT="green/black"

# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/usr/share/grub/background.png"
GRUB_THEME="/usr/share/grub/themes/manjaro/theme.txt"

# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"

[stephane]

change this and reboot
in file /etc/default/grub
menu will be visible
GRUB_TIMEOUT_STYLE=menu

sudo nano /etc/default/grub
sudo update-grub

stay on kernel 5.7

[ar_0]

Ok thanks, that’s worked!
Also the screen suspend issue seems ok.
Why not linux58 though?

[stephane]

kerl 5.8 is just started
can you close on solve topic ?

[ar_0]

Today when I start up the pc, selected linux57 kernel, I come across this message:

[FAILED] Failed to start Load/Save #ness of backlight:acpi_video0.
[FAILED] Failed to start Light Display Manager.

and I cannot login because the login screen never show up.
So I’ve to reboot and choose linux56 instead.

[stephane]

see this topic

Manjaro won't boot after update, Failed to start Load/Save #ness of backlight:acpi_video0

That is a systemd service that tries to save the level of backlight for your monitor when you shut down and restore it when you boot. To disable that as it doesn’t seem to work on your system anyway (It doesn’t on mine neither) just execute: sudo systemctl disable systemd-backlight@.service As taken from the old forum.

[ar_0]

As this post says I’ve run

sudo systemctl disable systemd-backlight@.service

then I shut down the pc. This time at the start up there isn’t the error above but blank screen and no login screen (linux57).

[stephane]

try to log with
Ctrl +Alt +F2 to F7

and after

sudo systemctl start systemd-backlight@.service

[ar_0]

I didn’t change anything in the meanwhile you were answering, but this time when I start up and select linux57 the login screen shown up. Isn’t that weird? (without any message like the one before)