http://bugzilla.kernel.org/show_bug.cgi?id=13121
--- Comment #12 from Zhang Rui <rui.zh...@intel.com> 2009-04-20 03:02:59 --- good job, Maxim.:) (In reply to comment #11) > It is oblivious, why the driver is broken, this is due to bug in acpi table, > that now got exposed, (It was present before, and resuled it brightness going > three levels down, when I pressed brightness down key) > And if I add 9 to _BQC result, everything work just fine. > right, this is an AML code problem to me. > I have small question, does windows use the acpi video interface? I have the same question. I've seen BIOSes with all kinds of buggy _BQC/_BCL/_BCM implemented, and I wonder how they works in Windows, sigh. Maybe windows prefer the platform specific methods to control the backlight by default and the ACPI video extension is a second choice. > What to do next: > > - Add a dmi quirk, > - catch similiar errors (if they return x*10+1, and model is acer, then add 9) > > - ignore that bug > well, this is a only way to workaround this problem in Linux kernel. but I need to make sure if this is worth doing. Maybe we should upgrade the BIOS first in the hope of the problem being fixed in a new BIOS release. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
