kernel: [12685.981409] Pid: 9534, comm: Xorg Tainted: G        W  O 3.5.0-18-generic #29-Ubuntu    /GA-K8N-SLi / GA-K8N-SLi-RH
kernel: [12685.981412] RIP: 0010:[<ffffffff8133b652>]  [<ffffffff8133b652>] ioread32+0x42/0x50
kernel: [12685.981415] RSP: 0018:ffff88009cc4b8a0  EFLAGS: 00000292
kernel: [12685.981417] RAX: 0000000000000b01 RBX: 0000000000000010 RCX: 000000000000aa16
kernel: [12685.981419] RDX: 000000000000aa16 RSI: 0000000000000000 RDI: ffffc9000066e048
kernel: [12685.981421] RBP: ffff88009cc4b8a8 R08: 0000000000000000 R09: ffff8800c5dac844
kernel: [12685.981423] R10: 00000000000027d6 R11: 00000000000007e9 R12: ffffffffffffff10
kernel: [12685.981424] R13: ffffc9000066e048 R14: 0000000000000000 R15: 0000000000009ff5
kernel: [12685.981427] FS:  00007f86d2e35880(0000) GS:ffff8800cfd00000(0000) knlGS:0000000000000000
kernel: [12685.981429] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: [12685.981431] CR2: 00007f86d24b0000 CR3: 00000000b2db0000 CR4: 00000000000007e0
kernel: [12685.981432] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kernel: [12685.981434] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
kernel: [12685.981436] Process Xorg (pid: 9534, threadinfo ffff88009cc4a000, task ffff88003b471700)
kernel: [12685.981437] Stack:
kernel: [12685.981438]  ffffffffa01486f6 ffff88009cc4b8f8 ffffffffa011b2b8 ffff88009cc4b918
kernel: [12685.981442]  ffff88003a0e03c0 ffff8800665ba100 ffff8800665ba100 ffffffffa01ceac0
kernel: [12685.981446]  ffff8800c5dac800 0000000000000000 ffff880035f80718 ffff88009cc4b918
kernel: [12685.981449] Call Trace:
kernel: [12685.981465]  [<ffffffffa01486f6>] ? nv10_fence_read+0x16/0x20 [nouveau]
kernel: [12685.981478]  [<ffffffffa011b2b8>] nouveau_fence_update+0xb8/0xe0 [nouveau]
kernel: [12685.981491]  [<ffffffffa011b301>] nouveau_fence_done+0x21/0x40 [nouveau]
kernel: [12685.981504]  [<ffffffffa011825e>] nouveau_bo_fence_signalled+0xe/0x10 [nouveau]
kernel: [12685.981511]  [<ffffffffa008b1a2>] ttm_bo_wait+0x132/0x1c0 [ttm]
kernel: [12685.981518]  [<ffffffffa008b582>] ttm_bo_cleanup_refs+0x62/0x160 [ttm]
kernel: [12685.981525]  [<ffffffffa008c744>] ttm_mem_evict_first+0xc4/0x230 [ttm]
kernel: [12685.981532]  [<ffffffffa008d075>] ttm_bo_mem_space+0x2d5/0x380 [ttm]
kernel: [12685.981539]  [<ffffffffa008d20e>] ttm_bo_move_buffer+0xee/0x160 [ttm]
kernel: [12685.981543]  [<ffffffff8168337e>] ? _raw_spin_lock+0xe/0x20
kernel: [12685.981554]  [<ffffffffa00c1cc0>] ? drm_mm_kmalloc+0x40/0xe0 [drm]
kernel: [12685.981562]  [<ffffffffa008d31d>] ttm_bo_validate+0x9d/0x120 [ttm]
kernel: [12685.981569]  [<ffffffffa008d6b1>] ttm_bo_init+0x311/0x3e0 [ttm]
kernel: [12685.981581]  [<ffffffffa01193ea>] nouveau_bo_new+0x1ca/0x2a0 [nouveau]
kernel: [12685.981593]  [<ffffffffa01181a0>] ? nouveau_ttm_io_mem_reserve+0x170/0x170 [nouveau]
kernel: [12685.981606]  [<ffffffffa011c2bb>] nouveau_gem_new+0x6b/0x130 [nouveau]
kernel: [12685.981619]  [<ffffffffa011c3ed>] nouveau_gem_ioctl_new+0x6d/0x190 [nouveau]
kernel: [12685.981630]  [<ffffffffa00b65f3>] drm_ioctl+0x4d3/0x580 [drm]
kernel: [12685.981644]  [<ffffffffa011c380>] ? nouveau_gem_new+0x130/0x130 [nouveau]
kernel: [12685.981648]  [<ffffffff811939d9>] do_vfs_ioctl+0x99/0x590
kernel: [12685.981651]  [<ffffffff81193f69>] sys_ioctl+0x99/0xa0
kernel: [12685.981654]  [<ffffffff81074771>] ? posix_ktime_get_ts+0x11/0x20
kernel: [12685.981658]  [<ffffffff8168b629>] system_call_fastpath+0x16/0x1b
kernel: [12685.981659] Code: 66 0f 1f 84 00 00 00 00 00 55 48 c7 c6 47 ff a3 81 48 89 e5 e8 40 fe ff ff b8 ff ff ff ff 5d c3 66 0f 1f 84 00 00 00 00 00 8b 07 <c3> 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 ff ff ff 03 00