Screen brightness resets to default (half) with battery power

[Nicolas Valcarcel]

Binary package hint: gnome-power-manager

When running on battery mode no AC connected, the screen brightness comes back to the middle of it, as it should be, but when changing it to 100% it automatically returns to 50%, which is something not wanted.

[Mackenzie Morgan (maco.m)]

What version of Ubuntu are you using?

[Nicolas Valcarcel (nvalcarcel)]

Intrepid

[Chow Loong Jin (hyperair)]

Setting to gnome-power-manager, because pm-utils doesn't touch the screen brightness.

[Victor Vargas (kamus)]

Since this report have a long time without activity, could you check (if is possible) in latest version included in Karmic if this issue is still happening? Thanks in advance.

[DGMcCloud (duncan-doyle)]

I can confirm that this bug is still present in Karmic (I'm on a Dell D820). With the "reduce backlight" option enabled and the "dim backlight when idle" disabled, the backlight is automatically reduced to 50% when unplugging AC. When I then up the backlight to 100% and let the system sit idle for a while, the backlight is reduced to 50% again. The idle time seems to be random, sometimes it happens after 5 seconds, sometimes after 50 seconds. The maximum idle time is around a minute or so.

This issue seems more or less similar to what "drekbour" describes in this bug-report: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/292840/comments/3

I can reproduce this bug. The only workaround I found so far is to disable the "reduce backlight" option.

[DGMcCloud (duncan-doyle)]

I just tested this on Lucid. The bug is still there.

[Marc MAURICE (dooblem)]

I have this bug too with my thinkpad t42p. When on battery, brightness is reset to a low value after some time.
It's really anoying.

[Marc MAURICE (dooblem)]

I'm using maverick.

[Launchpad Janitor (janitor)]

[Expired for gnome-power-manager (Ubuntu) because there has been no activity for 60 days.]