Hi Volker, I tried different manner but none of them reproduce your behaviour. Thanks for the tips and tricks anyway :) I didn't give up with my tests as I really like this little Amilo machine and use it everyday to code web site. So I ended up with a Lenny Debian 5 installation to go back to the roots and see what happen. Good news: as you may guess, all is working perfectly ! I hope this feedback will help to diff somewhere the differences between Debian Lenny and Jaunty. My kernel is 2.6.26-2. Or, if someone can tell me where to look at I will be more than happy to help. Philippe
Volker Knollmann a écrit : > Hmmm... weird... I just found out that correct display brightness is > restored on resume if the laptop is NOT CONNECTED to the AC power. So > the problem does not occur when resuming on battery power. > > @Philippe: > Can you confirm this behaviour with our own system? > > I have no idea about the detailed technical background, so I'm just guessing: > Is there some kind of trigger/event/interrupt from ACPI missing/ignored when > resuming on AC power? Some trigger like "Hey, adjust your display > brightness!!". > During normal operation such an event seems to be fired when disconnecting AC > power, since the display is slightly dimmed. Maybe it's exactly this function > "detect transition from AC to battery ==> set brightness" that runs at the > very moment the laptop wakes up with AC power disconnected. That would > explain why the brightness is restored in that special case. > > > This is just my own theory... since I'm not burdened with any technical > expertise chances are high that it's complete bullsh*t... ;-) > > Best regards, > Volker > > -- *Philippe Lanceleur* Directeur Associé *DoDo-IT Limited* Chemin de la quincaillerie Flic-en-Flac Ile Maurice Tel:(+230)453 9302 Fax:(+230)453 9340 www.dodo-it.com -- [i965GM] Display brightness completely dimmed after waking up from suspend https://bugs.launchpad.net/bugs/417610 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
