[SOLVED] Laptop backlight dims to zero on boot with kernel 5.14.0

Originally Posted by glats I have the same problem with my thinkpad t14. Only my card is a single Renoir. Is this due to some change in the amdgpu driver or kernel?

Having the same issue with my T14 here.

Does anyone know where to correctly file a bug report for this? (kernel vs. freedesktop/amdgpu)

Originally Posted by jorp Having the same issue with my T14 here. Does anyone know where to correctly file a bug report for this? (kernel vs. freedesktop/amdgpu)

https://www.linuxquestions.org/quest...ml#post6290782

Originally Posted by marav FYI, kernel 5.10.x, just as kernel 5.15.0-rcX, doesn't seem to have the "amdgpu backlight" issue So, they don't need the udev .rules (needed for 5.14.x serie) or any other workaround

It seems that this is only related to version 5.14.x. (for me, at least)

Originally Posted by marav https://www.linuxquestions.org/quest...ml#post6290782 It seems that this is only related to version 5.14.x. (for me, at least)

I can also confirm that this problem is fixed in 5.15.x on my end. No longer need udev rule.

Originally Posted by Daedra I can also confirm that this problem is fixed in 5.15.x on my end. No longer need udev rule.

+1. Since upgrading to the 5.15 series kernel today, this issue is resolved with no udev rule required.