http://bugzilla.kernel.org/show_bug.cgi?id=12249
------- Comment #26 from rui.zh...@intel.com 2008-12-22 23:40 ------- (In reply to comment #25) > (In reply to comment #23) > > Created an attachment (id=19443) --> (http://bugzilla.kernel.org/attachment.cgi?id=19443&action=view) [details] [details] > > customized DSDT: fix another BIOS bug > > > > _BQC should return the current backlight levels rather than an index in the > > PCTG package. > > With this DSDT, incrementing brightness above 100% will flip-flop from 25% to > 100%: ... -> 80 -> 85 -> 90 -> 100 -> 25 -> 100 -> 25 -> ... > And same thing when decrementing below 20%. weird, please apply the debug patch I attached below and attach the dmesg output after doing the same test, and you'd better add some comments in the dmesg like this: ... ... pressing the hotkey ... ... cat /proc/acpi/video/VGA/LCDD/brightness ... ... pressing the hotkey ... ... > > Start with brightness at 100% > > # cat /sys/class/backlight/acpi_video0/actual_brightness > 0 echo 0 > /sys/class/backlight/acpi_video0/brightness at this time, and cat /sys/class/backlight/acpi_video0/actual_brightness what does dmesg say? BTW: do remember to apply the patch in comment #3 when doing this test. > # dmesg | tail > <...> > [ 893.870775] Rui: current level is 20, brightness count is 18 > # echo 6 > /sys/class/backlight/acpi_video0/brightness > /* brightness goes to 50% */ > # cat /sys/class/backlight/acpi_video0/actual_brightness > 9 > # dmesg | tail > <...> > [ 893.870775] Rui: current level is 20, brightness count is 18 > [ 929.443643] Rui: current level is 65, brightness count is 18 > > /* Note: according to my eyes and /proc/acpi/video/VGA/LCDD/brightness , > brightness is now 50%, not 65% */ > hmm, what does "/proc/acpi/video/VGA/LCDD/brightness" say in this case? there should be something like "current: 65" I think. -- 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, or are watching someone who is. ------------------------------------------------------------------------------ _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
