https://bugs.freedesktop.org/show_bug.cgi?id=52313
Bug #: 52313 Summary: r600g: Linux 3.3.x broken since 30257c32 Classification: Unclassified Product: Mesa Version: git Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r600 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: stefandoesinger@gmx.at
Since Mesa commit 30257c32910c3f7ac2b9cc24399d6be196d34d26 r600g fails to render anything on Linux 3.3 and probably all earlier versions. An upgrade to 3.4 fixes the issue.
The output from glxinfo is: radeon: The kernel rejected CS, see dmesg for more information.
This is accompanied by the following lines in dmesg: [199859.400626] radeon 0000:01:00.0: forbidden register 0x00028b28 at 188 [199859.400628] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
My understanding is that Mesa is intended to remain backwards compatible with older kernels. If this is not the case feel free to close the bug.