[Bug 23015] New: Display corruption, X-window becomes unusable with radeon driver and Radeon HD 3300: [drm] wait for fifo...

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=23015

           Summary: Display corruption, X-window becomes unusable with
                    radeon driver and Radeon HD 3300: [drm] wait for fifo...
           Product: xorg
           Version: 7.3
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: toekimov at gmail.com
         QAContact: xorg-team at lists.x.org


While 10-15 minutes working with X-window the whole screen gets
corrupted(vertical lines and trash) and machine becomes unusable. Scrolling
something (for example: filelist in Krusader) makes it faster. Dmesg says:
[drm] wait for fifo failed status : 0xE00014AC 0x00100003.
VideoCard: Radeon HD 3300 Integrated Graphics
This problem was found on 2 machines: MSI 790GX-G65 motherbord and ASUS
m4a78t-e (790GX too).

I build on last week radeon and radeonhd from git, but the same result.
But i find next:
If disable onboard video memory(called SIDEPORT) and use ONLY system memory as
video memory(in BIOS called UMA) problem disappeared.  


Post Scriptum: Sorry for my pidgin english.


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