[Bug 207473] Re: Screen brightness double level changes

[Mario Limonciello]

this is actually caused by a BIOS bug/kernel bug (depends who you talk
to).  It's because the BIOS has tables in the DSDT to represent the
possible different video cards that would ship with the box (UMA or
discrete).  There is a fix available upstream, but it causes regressions
on other machines.  It will need to be tracked until it's ready.

** Changed in: hal (Ubuntu)
       Status: Confirmed => Invalid

** Changed in: hal (Ubuntu Hardy)
       Status: Confirmed => Invalid

** Bug watch added: Linux Kernel Bug Tracker #11647
   http://bugzilla.kernel.org/show_bug.cgi?id=11647

** Also affects: linux via
   http://bugzilla.kernel.org/show_bug.cgi?id=11647
   Importance: Unknown
       Status: Unknown

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low
       Status: New => Confirmed

** Changed in: linux (Ubuntu Hardy)
   Importance: Undecided => Low
       Status: New => Confirmed

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Screen brightness double level changes
https://bugs.launchpad.net/bugs/207473
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