[Bug 35160] New: inferior output using external VGA with radeon mobility m7 laptopP

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Mar 9 13:48:16 PST 2011


           Summary: inferior output using external VGA with radeon
                    mobility m7 laptopP
           Product: xorg
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: clint at debian.org
         QAContact: xorg-team at lists.x.org

On various laptops with radeon cards, the LVDS display is fine, but the font
rendering varies from blurry to spastic on an external display, and sometimes
the color balance is affected.

One card is

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW
[Radeon Mobility 7500]

and the Debian revision of xserver-xorg-video-radeon is 1:6.13.1-2+squeeze1.

No large distortions in the style of #22175 are experienced.

This happens with an empty/non-existent config.  The effects are not entirely
consistent, but some form of the problem consistently occurs when windows are
placed on the external monitor.

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