I'm getting this error too after updating to Quantal, when I check dmesg I get:
[ 2554.569136] radeon 0000:01:00.0: evergreen_cs_track_validate_cb:477 cb[0] bo too small (layer size -2147483648, offset 0, max layer 1, bo size 4096, slice 4194303) [ 2554.569140] radeon 0000:01:00.0: evergreen_cs_track_validate_cb:481 problematic surf: (32 8388608) (0 8 1 0 0 0 0) [ 2554.569142] radeon 0000:01:00.0: evergreen_packet3_check:2096 invalid cmd stream 783 [ 2554.569143] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream ! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/954058 Title: radeon: The kernel rejected CS, see dmesg for more information. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954058/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
