I have the same problem while compiling an trying to run a demo embedding a Irrlich display inside a QT window.
Xubuntu 12.04. console: radeon: The kernel rejected CS, see dmesg for more information. radeon: The kernel rejected CS, see dmesg for more information. radeon: The kernel rejected CS, see dmesg for more information. Then, dmesg | tail displays: [18347.094965] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream ! [18347.095031] radeon 0000:01:00.0: z/stencil with no depth buffer [18347.095034] radeon 0000:01:00.0: r600_packet3_check:1483 invalid cmd stream [18347.095036] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream ! [18347.095116] radeon 0000:01:00.0: z/stencil with no depth buffer [18347.095119] radeon 0000:01:00.0: r600_packet3_check:1483 invalid cmd stream [18347.095121] [drm:radeon_cs_ioctl] *ERROR* Invalid command stream ! [18347.104735] radeon 0000:01:00.0: z/stencil with no depth buffer [18347.104742] radeon 0000:01:00.0: r600_packet3_check:1483 invalid cmd stream [18347.104746] [drm:radeon_cs_ioctl] *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
