Comment 32 for bug 557266

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Daniel Richard G. (skunk) wrote : Re: [Radeon kernel module] drmRadeonCmdBuffer: -22. Kernel failed to parse or rejected command stream

Downgrading my kernel to linux-image-2.6.31-02063113-generic makes this problem go away. (This is with X11 packages from the xorg-edgers PPA, but those shouldn't be necessary, since they never seemed to make a difference anyway.)

I believe this is technically a Karmic kernel---it's the most recent available mainline build of 2.6.31, from June 4---but have not noticed any anomalies from my Lucid system running on it. For those interested in this workaround, kernel packages are available here:

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.31.13-karmic/