kernel BUG at /build/buildd/linux-2.6.32/drivers/gpu/drm/drm_fops.c:146!
invalid opcode: 0000 [#2] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:10.0/0000:03:00.0/boot_vga
CPU 1 
Modules linked in: snd_hda_codec_nvhdmi snd_hda_codec_via snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss joydev snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event fbcon tileblit font bitblit softcursor vga16fb vgastate snd_seq nouveau snd_timer snd_seq_device ppdev ttm drm_kms_helper parport_pc video output asus_atk0110 usbhid hid drm snd i2c_algo_bit i2c_nforce2 shpchp psmouse serio_raw edac_core edac_mce_amd soundcore snd_page_alloc lp parport floppy forcedeth
Pid: 1185, comm: Xorg Tainted: G      D    2.6.32-16-generic #25-Ubuntu System Product Name
RIP: 0010:[<ffffffffa00e402f>]  [<ffffffffa00e402f>] drm_open+0x10f/0x120 [drm]
RSP: 0018:ffff88021e8e5c68  EFLAGS: 00010206
RAX: ffff880226bb7d48 RBX: 0000000000000000 RCX: 0000000000000015
RDX: 0000000000000000 RSI: ffff8802368029c0 RDI: ffff88023685f820
RBP: ffff88021e8e5c98 R08: ffff8800282922e0 R09: 00000000000000c0
R10: ffff8802376969c0 R11: 0000000000000002 R12: ffff88022583f800
R13: ffff8802257fd070 R14: ffff88023685f800 R15: ffff88023685f820
FS:  00007f0a758e4700(0000) GS:ffff880028280000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a72222c80 CR3: 0000000236c2e000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process Xorg (pid: 1185, threadinfo ffff88021e8e4000, task ffff88021e8744d0)
Stack:
 000000000e200000 ffffffffa00f67c0 ffff8802257fd070 ffff880236802480
<0> 00000000ffffffed ffff88023685f800 ffff88021e8e5ce8 ffffffffa00e4173
<0> ffff880236c38180 ffff880237840000 000000000000002b 0000000000000000
Call Trace:
 [<ffffffffa00e4173>] drm_stub_open+0x133/0x260 [drm]
 [<ffffffff81143d0a>] chrdev_open+0x13a/0x240
 [<ffffffff81143bd0>] ? chrdev_open+0x0/0x240
 [<ffffffff8113e033>] __dentry_open+0x113/0x370
 [<ffffffff8124ecdf>] ? security_inode_permission+0x1f/0x30
 [<ffffffff8114a3c7>] ? inode_permission+0xb7/0xe0
 [<ffffffff8113e3a7>] nameidata_to_filp+0x57/0x70
 [<ffffffff8114e60a>] do_filp_open+0x2ca/0xb90
 [<ffffffff8115a0aa>] ? alloc_fd+0x10a/0x150
 [<ffffffff8113dda9>] do_sys_open+0x69/0x170
 [<ffffffff8113def0>] sys_open+0x20/0x30
 [<ffffffff810131f2>] system_call_fastpath+0x16/0x1b
Code: 89 ff e8 65 57 f5 e0 66 90 eb 99 90 4c 89 ff e8 58 57 f5 e0 66 90 4c 89 f7 e8 ce f9 ff ff 89 c3 eb 82 49 3b 85 10 01 00 00 74 a7 <0f> 0b eb fe 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 
RIP  [<ffffffffa00e402f>] drm_open+0x10f/0x120 [drm]
 RSP <ffff88021e8e5c68>
---[ end trace b1b94b9a0516a73e ]---