[Virtual-pkg-base-maintainers] Bug#656015: base: Monitor EDID not recognized by Linux kernel 3.x on AMD A6 CPU

[Grigor Gatchev]

Package: base
Severity: important

-- System Information:
CPU: AMD A6
MB: AsRock A55 Pro3
Debian release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

-- Bug Description:
After upgrading kernel from 2.6.39 to 3.0.0, monitor gets switched off
during kernel boot. Otherwise all is OK (I can ssh in, etc).

The following lines are found in the syslog:

[drm] Radeon display connector HDMI-A-1: No monitor connected or invalid EDID
[drm] Radeon display connector VGA-1: No monitor connected or invalid EDID

The bug persists also in kernels 3.1.0, 3.1.0-1 and 3.2.0-rc7.
Kernels up to 2.6.39 incl. work fine.

Tested with several different monitors (all connected to the VGA port).

Please do not hesitate to ask for more info.

Grigor