>From acer acpi ,I came to know that the 4730 series uses new wmi interface . http://code.google.com/p/aceracpi/wiki/SupportedHardware Thanks , Pradeep Subrahmanion On Thu, Mar 22, 2012 at 9:24 AM, joeyli <jlee@xxxxxxxx> wrote: > 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
