Bug#762676: gnome-shell: docking laptop or restarting Shell while docked sets backlight to off

[Michael Biebl]

Control: tags -1 confirmed

Am 24.09.2014 um 12:52 schrieb Simon McVittie:
> Package: gnome-shell
> Version: 3.14.0-1
> Severity: normal
> 
> I have a Lenovo Thinkpad X220 laptop with Intel graphics, a docking station
> and a DisplayPort-attached monitor, in this configuration:
> 
>        /---------\
>  /-----+ monitor |
>  |X220 |         |
>  \-----+---------/
> 
> The X220 is the primary monitor (with the menu bar), if that matters.
> 
> When I dock the X220 into the docking station or restart Shell with
> Alt+F2, "r", the X220's backlight turns down to its lowest level, which
> is unreadable. Workaround: turn it back up with the hotkey (Fn+Home).
> 
> When I experienced this when docking the laptop I thought it was more likely
> to be a kernel or "plumbing" bug (systemd or udev or something), but I'm
> filing it against gnome-shell for now, since I can also reproduce it with
> Alt+F2, "r".
> 
> Any debugging advice?

I almost have the identical setup and I can confirm this behaviour with
with an up-to-date sid.
This seems to be a recent change in behaviour/regression.
I suspected systemd v215 as possible culprit as well, but I can also
reproduce this with v208.

-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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