https://bugs.freedesktop.org/show_bug.cgi?id=31213

Summary: [drm] *ERROR* with KMS (any kernels 2.6.3x.x) and ati mobility radeon X300 Product: DRI Version: XOrg CVS Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: djnass_18@hotmail.com

when loading the 'radeon' driver with modeset=1 (KMS enabled) the following error appears in dmesg | grep drm

[drm:r100_ring_test] *ERROR* radeon: ring test failed (sracth(0x15E4)=0xCAFEDEAD) [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).

the result is that OpenGL renderer with be the 'software rasterizer'. and performance is obviously crippled.

glxinfo returns:

OpenGL vendor string: Mesa Project OpenGL renderer string: Software Rasterizer OpenGL version string: 2.1 Mesa 7.8.1

The error occurs with kernels 2.6.33.4, 2.6.35.7 and even the latest at the time 2.6.36. The pc is a toshiba satellite m40-185 laptop with ati mobility radeon X300 (rv370) gpu.

Additionally, I have tried installing the git versions of libdrm, mesa, and xf86-video-ati to this date (29/10/2010) with Gallium support (enabled in turn --enable-gallium, --enable-gallium-radeon and even both, using llvm (version 2.8) compiler. The problem persists.

The only way to get 3d accelaration is to disable KMS. then dmesg | grep drm seems to load up fine (see here: http://pastebin.com/vNfyeq7P). But then I have problems with 3d applications 'competing' to stay on top - they don't seem to be able to work well with KDE4 compositing effects. To avoid that I have to disable the compositing effects ( see here for in depth explanation and some Xorg.0.log and dmesg outputs http://www.linuxquestions.org/questions/slackware-14/3d-applications-compete... )