[Bug 57679] New: EQ overflow when start X with KMS-enabled radeon

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57679

          Priority: medium
            Bug ID: 57679
          Assignee: xorg-driver-ati at lists.x.org
           Summary: EQ overflow when start X with KMS-enabled radeon
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mityukov at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/Radeon
           Product: xorg

Created attachment 70778
  --> https://bugs.freedesktop.org/attachment.cgi?id=70778&action=edit
Full dmesg that I've got; Kernel was booted with drm.debug=1

I have dual-graphics laptop (AMD Fusion A6 based). Here's the hardware spec:

00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
BeaverCreek [Radeon HD 6520G]
02:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Caicos
[Radeon HD 6400M/7400M Series]


I can boot into console with KMS enabled, but when I start X Windows (twm, so,
not 3D, I believe), I get corrupted screen and the mouse cursor is either
locked or unlocked periodically (about 10 seconds for every state). Xorg.log
shows "EQ overflow" errors.

Graphics stack:
- DRM: radeon module; Kernel v3.6.5;
- Mesa 9.0.1;
- glamor(git)
- xf86-video-ati(git); built with --enable-glamor; 
P.S.: With EXA or even without explicit definition of "AccelMethod" the problem
remains the same. It is the same either with xf86-video-ati 7.0.0 (non-git).

Attaching dmesg and xorg log.

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