Bug#890326: linux: Thinkpad X61 brightness reset to 0% on each boot

[Salvatore Bonaccorso <carnil@debian.org>]

Control: tags -1 + moreinfo

Hi Thorsten,

On Tue, Feb 13, 2018 at 02:51:37PM +0100, Thorsten Glaser wrote:
> Package: src:linux
> Version: 4.14.13-1
> Severity: minor
> 
> Ever since a recent kernel upgrade (I *think* 4.13 to 4.14; if
> necessary, I can check), on each boot, my LCD brightness gets
> reset to the minimum.
> 
> This is annoying; I currently work around it by putting
> 	cat /sys/class/backlight/intel_backlight/max_brightness \
> 	    >/sys/class/backlight/intel_backlight/brightness
> into /etc/rc.local, but it makes it virtually impossible to read
> boot messages.
> 
> Furthermore, I have a slight feeling that the maximum brightness
> is lower than it was before, or compared to my IBM Thinkpad X40.
> That being said, several minutes after booting, it seems to be
> becoming a bit brighter, so it’s maybe only on a cold start.

Is this still something you can reproduce with recent kernels?

Regards,
Salvatore