Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa015a82f>] ? 
ttm_bo_reserve+0xdf/0x120 [ttm]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa015c7ec>] ? 
ttm_buffer_object_validate+0x3c/0xd0 [ttm]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa019147c>] ? 
radeon_object_list_validate+0xfc/0x210 [radeon]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa019fade>] ? 
radeon_cs_ioctl+0x9e/0x1e0 [radeon]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa00b04fa>] ? 
drm_ioctl+0x17a/0x390 [drm]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffffa019fa40>] ? 
radeon_cs_ioctl+0x0/0x1e0 [radeon]
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff810a005a>] ? 
mmap_region+0x24a/0x5b0
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff810c7b32>] ? 
vfs_ioctl+0x82/0xb0
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff810c7c88>] ? 
do_vfs_ioctl+0x88/0x570
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff810a07f0>] ? 
do_mmap_pgoff+0x430/0x480
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff814dbdb2>] ? 
do_page_fault+0x112/0x440
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff810c81b9>] ? 
sys_ioctl+0x49/0x80
Dec  7 18:48:20 NCC-5001-D kernel: [<ffffffff8100b3ab>] ? 
system_call_fastpath+0x16/0x1b
Dec  7 18:48:20 NCC-5001-D kernel: Code: 08 89 0c 24 31 c0 48 c7 c1 20 
b0 1d a0 bf 01 00 00 00 e8 93 d4 ee ff 8b 8b c0 0e 00 00 48 8b 83 c8 0e 
00 00 41 89 cc 49 c1 e4 02 <4c> 03 60 28 40 f6 c5 03 0f 85 d2 03 00 00 
4c 89 f8 4c 09 e8 a8
Dec  7 18:48:20 NCC-5001-D kernel: RIP  [<ffffffffa01c76b1>] 
r600_kms_blit_copy+0x61/0xaa0 [radeon]
Dec  7 18:48:20 NCC-5001-D kernel: RSP <ffff8800794f19f8>
Dec  7 18:48:20 NCC-5001-D kernel: CR2: 0000000000000028
Dec  7 18:48:20 NCC-5001-D kernel: ---[ end trace f231c3afbb839b02 ]---
Dec  7 18:48:20 NCC-5001-D kernel: [drm:drm_release] *ERROR* Device 
busy: 1