On Sat, Jun 22, 2013 at 11:07:27PM -0000, Savio wrote:
> I have Dell inspiron with Intel core I3 and Intel HD graphics with ubuntu. 13.04 .
> I tried setting acpi_backlight=vendor but no help
> but setting acpi = off works but no touchpad support
>
> setting brightness manually in /sys/class/backlight/dell_ brightness/
> current* to 1 works and also changing this setting multiple times works
> great
This is actually a kernel bug (actually a firmware bug specific to your
machine) that is supposed to be fixed upstream by now (by just disabling the
interface for the firmware backlight driver). I think the fix will be
available starting from 3.10.
On Sat, Jun 22, 2013 at 11:07:27PM -0000, Savio wrote: vendor but no help backlight/ dell_ brightness/
> I have Dell inspiron with Intel core I3 and Intel HD graphics with ubuntu. 13.04 .
> I tried setting acpi_backlight=
> but setting acpi = off works but no touchpad support
>
> setting brightness manually in /sys/class/
> current* to 1 works and also changing this setting multiple times works
> great
This is actually a kernel bug (actually a firmware bug specific to your
machine) that is supposed to be fixed upstream by now (by just disabling the
interface for the firmware backlight driver). I think the fix will be
available starting from 3.10.
For more info, see https:/ /bugzilla. kernel. org/show_ bug.cgi? id=57571