You have old & broken userspace please consider updating mesa radeon 0000:05:00.0: GPU lockup CP stall for more than 1000msec ------------[ cut here ]------------ WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:235 radeon_fence_wait+0x239/0x290 [radeon]() Hardware name: MS-7125 GPU lockup (waiting for 0x0002B3E2 last fence id 0x0002B3DE) Modules linked in: ipv6 fuse ext3 jbd ata_generic pata_acpi pata_amd ide_pci_generic snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_emu10k1 snd_rawmidi snd_ac97_codec snd_hda_codec_atihdmi ac97_bus snd_seq_device snd_util_mem snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc fan firewire_ohci firewire_core crc_itu_t rtc_cmos rtc_core rtc_lib emu10k1_gp amd74xx gameport i2c_nforce2 processor thermal button ide_core forcedeth psmouse lp parport sg k8temp serio_raw evdev joydev pcspkr ext4 mbcache jbd2 crc16 aes_i586 aes_generic xts gf128mul dm_crypt dm_mod hid_cherry usbhid hid sd_mod ohci_hcd sata_nv ehci_hcd libata scsi_mod usbcore radeon ttm drm_kms_helper drm agpgart i2c_algo_bit i2c_core Pid: 6186, comm: firefox Not tainted 2.6.35-ck #1 Call Trace: [] warn_slowpath_common+0x6d/0xa0 [] ? radeon_fence_wait+0x239/0x290 [radeon] [] ? radeon_fence_wait+0x239/0x290 [radeon] [] warn_slowpath_fmt+0x2e/0x30 [] radeon_fence_wait+0x239/0x290 [radeon] [] ? autoremove_wake_function+0x0/0x40 [] radeon_sync_obj_wait+0xc/0x10 [radeon] [] ttm_bo_wait+0xd6/0x170 [ttm] [] radeon_gem_wait_idle_ioctl+0x81/0x110 [radeon] [] drm_ioctl+0x1b8/0x460 [drm] [] ? radeon_gem_wait_idle_ioctl+0x0/0x110 [radeon] [] ? sched_clock_cpu+0xe7/0x170 [] ? sched_clock_tick+0x5e/0x90 [] ? sched_clock+0x8/0x10 [] vfs_ioctl+0x34/0xa0 [] ? drm_ioctl+0x0/0x460 [drm] [] do_vfs_ioctl+0x66/0x560 [] ? __switch_to+0x169/0x170 [] ? schedule+0x484/0x890 [] sys_ioctl+0x5f/0x80 [] sysenter_do_call+0x12/0x28 ---[ end trace 1d12d8d1d8bb140e ]--- [drm] Disabling audio support radeon 0000:05:00.0: GPU softreset radeon 0000:05:00.0: R_008010_GRBM_STATUS=0xA0003030 radeon 0000:05:00.0: R_008014_GRBM_STATUS2=0x00000003 radeon 0000:05:00.0: R_000E50_SRBM_STATUS=0x200000C0 radeon 0000:05:00.0: R_008020_GRBM_SOFT_RESET=0x00007FEE [drm:radeon_ib_schedule] *ERROR* radeon: couldn't schedule IB(14). [drm:radeon_cs_ioctl] *ERROR* Faild to schedule IB ! [drm:radeon_ib_schedule] *ERROR* radeon: couldn't schedule IB(15). [drm:radeon_cs_ioctl] *ERROR* Faild to schedule IB ! radeon 0000:05:00.0: R_008020_GRBM_SOFT_RESET=0x00000001 radeon 0000:05:00.0: R_008010_GRBM_STATUS=0x00003030 radeon 0000:05:00.0: R_008014_GRBM_STATUS2=0x00000003 radeon 0000:05:00.0: R_000E50_SRBM_STATUS=0x200000C0 radeon 0000:05:00.0: GPU reset succeed [drm] Clocks initialized ! [drm:radeon_ib_schedule] *ERROR* radeon: couldn't schedule IB(0). [drm:radeon_cs_ioctl] *ERROR* Faild to schedule IB ! [drm] ring test succeeded in 1 usecs [drm] ib test succeeded in 1 usecs [drm] Enabling audio support