I think it's relatively common practice to have "extra" buttons *only* mapped as soft-keys. In the Microsoft Windows world, they want to have a clean behaviour between optimus compliant Windows versions and pre-optimus versions, and having it hard-wired would create problems.
That said, it would be great to have an easy way to create a powersave/performance keyboard shortcut in bumblebee/acpi_call/vga-switcheroo. On Mon, Jul 4, 2011 at 2:30 PM, Tommaso Falchi Delitala <[email protected]> wrote: > Hello everybody, > > Acer TimelineX laptops (3820TG, 4820TG) have a button labelled P > (Powersave?) and a blu led showing whether P(owersave) mode is enabled. > > Does any of you know what the P (Powersave?) button actually does. It seems > to me that it could have a role in VGA switching (Intel/ATI). > > This is my experience. > > Windows: > > the button switches between high-performance and power-save profiles, thus > automatically switching video cards (Intel/ATI). Led is OFF when in > Performance mode, ON when in Powersave. When the A/C power is diconnected > the led automatically turns on and the laptop switches to Intel graphics and > Powersave profile. Same behaviour can be triggered manually by clicking the > P button at any moment. > > Linux: > > If laptop is started on AC power everything works as expected (intel/radeon > drivers + vgaswitcheroo). P led is always off (no matters which card is > used). > > Clicking P button: > > - if Xorg is running --> button does nothing apart from showing a "keyboard: > can't emulate rawmode for keycode 240" message > > - if Xorg is not running --> screen brightness suddently decreases and this > message is printed: > > "ACPI Error: Current brightness invalid (20110316/video-377) > > ACPI: Failed to switch the brightness > > ACPI Warning: _BQC returned an invalid level (20110316/video-473)" > > If laptop is started on batteries, P led lights up as soon as Linux boots > and the kernel panics during UDEV start-up ( "BUG: unable to handle kernel > paging request at ffffc90409681ffc" @ evergreen_cp_resume [radeon], see full > dmesg log attached). This error can be prevented by clicking the P button > before UDEV starts (thus turning off P led). > > Is this P button more then just a soft-key? It seems that it could be > triggering something at BIOS level. > > Do you think this issue has anything to do with vgaswitcheroo or is it > related to acer-wmi/radeon modules? > > Best Regards, > > Tommaso > > _______________________________________________ > Mailing list: https://launchpad.net/~hybrid-graphics-linux > Post to : [email protected] > Unsubscribe : https://launchpad.net/~hybrid-graphics-linux > More help : https://help.launchpad.net/ListHelp > > _______________________________________________ Mailing list: https://launchpad.net/~hybrid-graphics-linux Post to : [email protected] Unsubscribe : https://launchpad.net/~hybrid-graphics-linux More help : https://help.launchpad.net/ListHelp
