On Sun, 2011-07-31 at 15:37 -0300, Sergio Belkin wrote:
> I've read http://fedoraproject.org/wiki/Bugs/Common#Laptop_screen_dims_when_switching_to_battery_power_or_idle_mode_but_never_brightens_again
>
> My system suffers the same symptoms but I use KDE. So it seems that is
> not GNOME restricted.
>
>
> Using F15 on x86_64
>
> cat /sys/module/pcie_aspm/parameters/policy
> default performance [powersave]
>
> any ideas?

That bug certainly was GNOME specific: it was a bug in
gnome-power-manager 's logic. There's no way that specific bug could
affect KDE, unless somehow you're running g-p-m in KDE. If you're seeing
a similar issue in KDE, it must track down to a different bug, so please
file it. Be aware, though, that the display dimming somewhat when you
disconnect the AC power is 'normal': both KDE and GNOME do this to save
battery power.

Yes of course Adam, I know it :)

The bug in this case was that when you re-connected to AC
the brightness did not increase again, but if you then disconnected from
AC once more the brightness would decrease further

This is the symptom that I'm talking about!

- so you got stuck in
a descending spiral of darkness until the screen was stuck at its lowest
possible brightness setting until you adjusted it manually or rebooted.
If the screen dims somewhat (to, say, 50%) when you unplug, goes back up
to 100% when you plug back in, then dims back to 50% when you unplug
again, that's intended behaviour and not a bug (though if you don't like
it, it's configurable).

Well in this case when I plug AC, kde applet says Performance, but screen is still dimmed, I have to select again Performance and maximum brigthness come back!

So it seems a kde bug, isn't it?

Thanks Adam for your help, I remember you since Mandriva days :)

--
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net

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