Bug#690794: [wheezy] Fails to read EDID, results in bad monitor flickering

[Jonathan Nieder <jrnieder@gmail.com>]

found 690794 linux/3.5.5-1~experimental.1
quit

Hi again,

darxus@chaosreigns.com wrote:

> Verified problem does still exist with linux-image-3.5-trunk-amd64
> from experimental.

Thanks much for checking.

Please report this to <http://bugs.freedesktop.org>, product DRI,
component General, and let us know the bug number so we can track it.

Be sure to mention:

 - steps to reproduce, expected result, actual result, and how the
   difference indicates a bug (should be simple enough)

 - which kernel versions and video cards you have tested and what
   happened with each

 - full "dmesg" output from booting and testing an affected kernel, as
   an attachment

 - full "dmesg" output from an unaffected kernel (also as an
   attachment), for comparison

 - any other weird symptoms or workarounds

 - links to http://bugs.debian.org/690794 and
   https://launchpad.net/bugs/958439 for the backstory

Hopefully someone upstream will have some idea about how to pin the
source of the problem down more precisely.

The only other idea I have is that if you know of an older, unaffected
kernel, it would be useful to find as new an unaffected kernel as
possible by trying kernels halfway between the newest known-bad and
oldest known-good kernel at
http://snapshot.debian.org/package/linux-2.6/ and
http://snapshot.debian.org/package/linux/ to figure out how this bug
was introduced.

Thanks and hope that helps,
Jonathan