[Bug 12048] New: Xpress 200M (RC410, 5a62) gives black screen when DRI is enabled

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12048

           Summary: Xpress 200M (RC410, 5a62) gives black screen when DRI is
                    enabled
           Product: xorg
           Version: git
          Platform: Other
               URL: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=437321
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: brice.goglin at ens-lyon.org
         QAContact: xorg-team at lists.x.org
OtherBugsDependingO 11749
             nThis:


Bug reported by Zack Weinberg on the Debian BTS 2 weeks ago, discussed with
airlied on IRC a couple times.

Since 6.6.192 and kernel 2.6.22, the radeon driver enables DRI on
  PCI:*(1:5:0) ATI Technologies Inc RC410 [Radeon Xpress 200M] rev 0
It results in a black screen for Zack.

The log with 6.6.193 and DRI is available at:
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=42;filename=xorg.log.6_6_193-1_dri;att=6;bug=437321
With DRI disabled in xorg.conf:
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=42;filename=xorg.log.6_6_193-1_no-dri;att=5;bug=437321

With AIGLX disabled (requested by airlied):
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=52;filename=xorg.log.6_6_193-1_no-aiglx;att=1;bug=437321

And finally, airlied requested the dmesg output when debug is enabled in the
drm kernel module:
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=62;bug=437321

I am marking as a blocker for 6.7 in case it's easy to fix. But, this
"regression" may be easily worked around by disabling DRI, feel free to unblock
if there's too much work needed to fix this...


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