[Bug 51248] New: Radeon fails to correctly initialise screen - turns off monitor then turns it back on with uniform colour

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=51248

             Bug #: 51248
           Summary: Radeon fails to correctly initialise screen - turns
                    off monitor then turns it back on with uniform colour
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: abc.mikey at googlemail.com
         QAContact: xorg-team at lists.x.org


Created attachment 63249
  --> https://bugs.freedesktop.org/attachment.cgi?id=63249
Xorg.0.log for first boot after fresh 12.04 install where monitor problem was
experienced

This is a regression on my Radeon HD 6950 as when I installed Ubuntu 11.04 it
was working however when I upgraded to 11.10 the problem started and it
persists in a fresh install of Ubuntu 12.04. (Sorry I can't be more specific
about when it started. If required I can boot into safe mode and pick up the
version of the Radeon driver.) 

When booting during the boot splash screen before any splash is shown the
monitor switches itself off for a second then turns on again but instead of
showing lightdm it shows a screen of a uniform colour that appears to be
related to the colour of the background on lightdm. (I noticed that the colour
in Ubuntu 11.10 was a purple colour however when I upgraded to 12.04 it
switched to a brownish colour, I don't know what background lightdm in 12.04
uses but I suspect that it must be similar to this brownish colour.) 

Switching to the terminal changes the uniform colour to black but does not
display any text.

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