https://bugs.freedesktop.org/show_bug.cgi?id=39550
--- Comment #13 from rick <rick.hendrick...@gmail.com> 2011-09-25 05:08:35 PDT --- (In reply to comment #12) > Rik > > Can you please indicate what exactly do you mean with > > "Brightness control does not work with this option for me." > > Does it work before suspending the system? Brightness control does not work before suspend, I did not try suspending. So no. > Can you please attach your dmesg log, as it is the one relevant in this case > (whereas xf86-video-nouveau, mesa and libdrm are not) will post in a few minutes (need to get laptop) > > Auke, Rik > > AFAIK brightness/backlight is(can be) controlled via > 1. ACPI > 2. platform specific - (asus-laptop, samsung-laptop, thinkpad ...) > 3. the gpu/card itself > > On various system different ones work correctly > > By default nouveau does not register it's device if an ACPI one exists > Note that the blob has similar behaviour but they have an option to override > it. > > If you suspect that the ACPI backlight control is buggy you can disable it by > appending "acpi_backlight=vendor" to your kernel command line I tried that. It works exactly the same as without this option. Brightness control works fine before suspend, fails after. > This will fall back to either 2. or 3. - dmesg will tell you which one > > Feel free to give it a try > > Cheers > Emil -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ Nouveau mailing list Nouveau@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/nouveau