Hi Русев, On 4/27/23 17:35, Русев Путин wrote: >> This patch should not change the maximum brightness. But you may need > to adjust the brightness once after changing to a new kernel with > the patch because the range / brightness-curve may be different. > > This patch does change the display brightness curve but it is very > buggy and does not change the brightness as soon as set. There is a > very significant delay in brightness transition on the laptop due to > this patch. Also it is worth mentioning that this patch also messes up > color contrast of the display causing significantly deeper blacks on > the display. Ok, lets remove the acpi_backlight=video quirk for Lenovo ThinkPad W530 then. This was intended to make life easier for Nvidia binary driver users, but since it is causing issues elsewhere Nvidia binary driver users will just have to manually pass acpi_backlight=video on the kernel commandline until Nvidia fixes the driver. I'll submit a patch to remove the quirk right away. Regards, Hans
