On Wed, 2009-04-15 at 03:52 +0800, Andika Triwidada wrote: > 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 > please attach the acpidump output. please try the latest git tree. thanks, rui -- 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