Hi Русев, On 4/28/23 15:22, Hans de Goede wrote: > 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. p.s. In the mean time you can work around the regression by passing: "acpi_backlight=native" on the kernel commandline. Regards, Hans
