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  1. Bug #428910
  2. Comment #6

Comment 6 for bug 428910

Revision history for this message
Stefan Bader (smb) wrote :

Note: this upstream patch looks interesting:

commit 90c53ca426cb93d15eefea79dcf6bd15ad3ffeb4
Author: Zhang Rui <email address hidden>
Date: Mon Aug 31 12:39:54 2009 -0400

    ACPI video: work-around BIOS AML bug in _BQC

    _BQC on some laptops returns an uninitialized value when it's
    invoked for the first time.

    Set the laptop to the maximum backlight level in this case.
    http://bugzilla.kernel.org/attachment.cgi?id=22675