On Wed, Apr 15, 2009 at 2:33 AM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > On Wed, Apr 15, 2009 at 02:31:35AM +0700, Andika Triwidada wrote: > >> /sys/class/backlight/acpi_video0/brightness exist, I can write and >> the value kept, >> but no effect on display brightness. > > Is this an Intel graphics machine? Is the i915 driver loaded? yes and yes $ lspci -nn|egrep '(VGA|Disp)' 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) 00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07) $ lsmod|grep 915 i915 44928 2 drm 110304 3 i915 intel_agp 39152 1 Regards, Andika -- 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
