Ubuntu
linux package

  1. Bug #1007765
  2. Comment #88

Comment 88 for bug 1007765

Revision history for this message
Marwan Tanager (marwan-tngr) wrote : Re: [Bug 1007765] Re: brightness adjusting crashes system

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.

For more info, see https://bugzilla.kernel.org/show_bug.cgi?id=57571