於 四，2012-03-22 於 09:02 +0530，Pradeep Subrahmanion 提到： > On Thu, 2012-03-22 at 11:25 +0800, joeyli wrote: > > 於 四，2012-03-22 於 08:03 +0530，Pradeep Subrahmanion 提到： > > > On Thu, 2012-03-22 at 09:33 +0800, joeyli wrote: > > > > 於 四，2012-03-22 於 00:39 +0530，Pradeep Subrahmanion 提到： > > > > > > This new patch should remove acpi_video0 interface on your machine. > > > > > > Please kindly provide your dmidecode: > > > > > > dmidecode > dmidecode.log > > > > > > > > > > > > And, > > > > > > please make should the patch really applied, you can do a bit change on > > > > > > pr_info message by yourself. > > > > > > > > > > Sorry . I think there was some mistake . I tried the patch again. Now > > > > > I see only intel_backlight inside /sys/class/backlight. There is no > > > > > acer-wmi interface . Is this the expected behavior ? . Or am I missing > > > > > anything ? > > > > > > > > > > > > > Yes, this is the expected behavior! But, now I doubt your issue was > > > > workaround by acpi_osi=Linux but not intel_backlight. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > echo 5 > /sys/class/backlight/acpi_video0/brightness > > > > > > > echo 5 > /sys/class/backlight/intel_backlight/brightness > > > > > > > > > > > > > > But it doesn't make any change . > > > > > > > > > > > > > > In my case , 'acpi_backlight = vendor' does not make any difference since the hot key control > > > > > > > > > > > > > > already starts working with 'acpi_osi=Linux' option. > > > > > > > > > > > > > > cat /proc/cmdline gives , > > > > > > > > > > > > > > BOOT_IMAGE=/boot/vmlinuz-3.3.0+ > > > > > > > root=UUID=f0197a59-c067-4fd8-ad90-c4d721816077 ro acpi_osi=Linux > > > > > > > > > > > > > > > > > > > > > Thanks , > > > > > > > > > > > > > > Pradeep Subrahmanion > > > > > > > > > > > > > > > > > > > OK, that's more clearly, please remove acpi_osi=Linux then re-test, I > > > > > > think the hotkey of backlight control only works with acpi_osi=Linux ? > > > > > > > > > > > > > > Does your backlight control still work if you remove acpi_osi=Linux ? > > > > > > If I remove acpi_osi=Linux , the hot key control stops working . > > > > > > > What is the preload OS in your machine when you bought it? Windows XP, > > Vista or Windows 7? > > It was Windows XP. > The WDDM driver didn't support by Windows XP, the brightness control on XP should works with _BCM or OpRegion. Wonder how does brightness control work on XP with your machine. I will dig more in your dsdt... Thanks Joey Lee -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
