I bought a brand new HP x360 435 g7 with ryzen 5 4500U with only FreeDOS pre-installed. I wanted to switch to linux, so I tried ubuntu, but nothing worked there. Since this is a new processor, I figured that manjaro would have newer drivers out of the box. It worked better, the only issue left is that the F4-F5 backlight buttons only manage to get the backlight between 50%-100% of intensity. I tried updating to a newer kernel, but during reboot I got this error message:
[FAILED] Failed to start Load/Save Screen Backlight ness of backlight:acpi_video0
I used timeshift to return to my old working kernel and it worked fine. But after updating my system yesterday, I again get stuck with the error message.
I did research and tried setting a Kernel Parameter:
GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_backlight=vendor"
But it doesn’t work, saying something like no vendor driver is specified
So back to timeshift, reset my kernel, more research. I tried this:
systemctl status systemd-backlight@backlight:acpi_video0.service
Output is:
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen Backlight Brightness of backlight:acpi_video0
Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2020-08-17 11:26:39 CEST; 5min ago
Docs: man:systemd-backlight@.service(8)
Process: 1233 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:acpi_video0 (code=exited, status=1/FAILURE)
Main PID: 1233 (code=exited, status=1/FAILURE)
Aug 17 11:26:39 martin435g7 systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:acpi_video0...
Aug 17 11:26:39 martin435g7 systemd-backlight[1233]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Aug 17 11:26:39 martin435g7 systemd[1]: systemd-backlight@backlight:acpi_video0.service: Main process exited, code=exited, status=1/FAILURE
Aug 17 11:26:39 martin435g7 systemd[1]: systemd-backlight@backlight:acpi_video0.service: Failed with result 'exit-code'.
Aug 17 11:26:39 martin435g7 systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
journalctl -b _PID=1233
output:
-- Logs begin at Mon 2020-08-17 11:26:36 CEST, end at Mon 2020-08-17 11:50:48 CEST. --
Aug 17 11:26:39 martin435g7 systemd-backlight[1233]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Is there some way to get updates not crash my system AND getting my backlights to work…?
I am a complete newbie and definitely can’t figure this out on my own, I am grateful for every help I can get.