On Wed, Dec 17, 2008 at 1:57 AM, Zhang Rui <rui.zhang@xxxxxxxxx> wrote: > On Wed, 2008-12-17 at 04:55 +0800, Matthew Garrett wrote: >> On Tue, Dec 16, 2008 at 10:00:23AM -0800, Andrew Morton wrote: >> >> > OK, that's weird. I have a suspicion that we're about to find out that >> > this is intentional, but I don't know what the fix is.. >> >> My recollection is that some BIOSes provide the list of brightness >> values in reverse order - someone posted a patch to sort them in-kernel, >> but I can't remember what happened to it. xbacklight will work because >> it triggers a direct write to the hardware if the acpi driver isn't >> loaded. >> > right, this seems to be a duplicate of > http://bugzilla.kernel.org/show_bug.cgi?id=12037 > > khashayar, > please attach the result of "grep . /proc/acpi/video/*/*/*". > please try the patch in > http://bugzilla.kernel.org/show_bug.cgi?id=12037#c5 > and see if it helps. > Here's the output of "grep . /proc/acpi/video/*/*/*". The video module wasn't loaded at boot time, but just before greping. I don't know if that has any relevance. Also, there's an external display attached at this point. /proc/acpi/video/VGA/CRTD/brightness:<not supported> /proc/acpi/video/VGA/CRTD/EDID:<not supported> /proc/acpi/video/VGA/CRTD/info:device_id: 0x0100 /proc/acpi/video/VGA/CRTD/info:type: CRT /proc/acpi/video/VGA/CRTD/info:known by bios: yes /proc/acpi/video/VGA/CRTD/state:state: 0x1d /proc/acpi/video/VGA/CRTD/state:query: 0x00 /proc/acpi/video/VGA/DVID/brightness:<not supported> /proc/acpi/video/VGA/DVID/EDID:<not supported> /proc/acpi/video/VGA/DVID/info:device_id: 0x0321 /proc/acpi/video/VGA/DVID/info:type: DVI /proc/acpi/video/VGA/DVID/info:known by bios: yes /proc/acpi/video/VGA/DVID/state:state: 0x1d /proc/acpi/video/VGA/DVID/state:query: 0x00 /proc/acpi/video/VGA/HDMI/brightness:<not supported> /proc/acpi/video/VGA/HDMI/EDID:<not supported> /proc/acpi/video/VGA/HDMI/info:device_id: 0x7320 /proc/acpi/video/VGA/HDMI/info:type: DVI /proc/acpi/video/VGA/HDMI/info:known by bios: yes /proc/acpi/video/VGA/HDMI/state:state: 0x1d /proc/acpi/video/VGA/HDMI/state:query: 0x00 /proc/acpi/video/VGA/LCDD/brightness:levels: 100 91 86 81 76 70 65 60 55 50 45 40 35 30 25 20 /proc/acpi/video/VGA/LCDD/brightness:current: 86 /proc/acpi/video/VGA/LCDD/EDID:<not supported> /proc/acpi/video/VGA/LCDD/info:device_id: 0x0410 /proc/acpi/video/VGA/LCDD/info:type: LCD /proc/acpi/video/VGA/LCDD/info:known by bios: yes /proc/acpi/video/VGA/LCDD/state:state: 0x1d /proc/acpi/video/VGA/LCDD/state:query: 0x00 I will try the patch as soon as I can, and get back to you. > thanks, > rui > Thank you, Khash. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
