Upgrading my Alienware 17 R4 laptop to the 465.24.02 driver breaks the backlight control. The backlight is very bright (probably 100%) with the 465.24.02 driver and cannot be changed. Reverting back to the 460.67 driver restores the backlight control.

I reinstalled 465.24.02 and removed the nomodeset kernel parameter when rebooting. The problem persists with 465.24.02. The nomodeset parameter is present for the 460.67 driver and the backlight control works as expected. In case it is useful, I’ve included the bug report after booting with 465.2…

[ 6.576311] audit: type=1130 audit(1618879473.126:108): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=‘unit=systemd-backlight@backlight:acpi_video1 comm=“systemd” exe=“/usr/lib/systemd/systemd” hostname=? addr=? terminal=? res=failed’ What would the output of s…

The output of the systemctl status is: ● systemd-backlight@backlight:acpi_video1.service - Load/Save Screen Backlight Brightness of backlight:acpi_video1 Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static) Active: inactive (dead) Docs: man:systemd-backlight@.service(8) U…

Also tried acpi_backlight=video with 465.24.02 without success. xbacklight also does not change the backlight brightness. I can use “xrandr --output DP-0 --brightness 0.7” to dim the super bright display, but that is an ugly workaround. 460.73.01 works as expected. It would be appreciated if som…

I’m having the same issue tbeckman reported on an Alienware 15 R3 with nvidia driver 465.24.02, while everything works fine using 460.67. I’d like to add that in /sys/class/backlight/nvidia_0 folder, the values within brightness and actual_brightness do change when using hotkeys or tools like xbac…

Still present in 465.31. Downgrading to 460.67 still fixes the issue. Is this regression confirmed/being looked into? For the record: Backlight doesn't work at all / Laptop Issues / Arch Linux Forums

This regression is still present in 470.42.01. The last working driver I’ve found is 460.73.01. @amrits - @aplattner - Can you please acknowledge that you’ve seen this bug and are going to look into it?

regression still present in 470.57.02

nvidia-dkms 460.67-1 was working fine with 5.12.15, but then I upgraded to linux-5.13.4 and it breaks, I’m getting this error when upgrading: ==> dkms install --no-depmod -m nvidia -v 460.67 -k 5.13.4-arch1-1 Error! Bad return status for module build on kernel: 5.13.4-arch1-1 (x86_64) Consult /var/…

Laptop backlight control regression with 465.24.02

Graphics / Linux Linux

tbeckman May 3, 2021, 12:13am 9

This regression is still present in 465.27.

1 Like

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Laptop backlight control regression with 465.24.02

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