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kernel BUG at /build/buildd/linux-2.6.38/drivers/tty/vt/vt.c:2857!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:02:0b.0/resource
Modules linked in: usb_storage uas iptable_filter ip_tables x_tables binfmt_misc snd_ens1371 gameport snd_ac97_codec ac97_bus snd_bt87x snd_pcm snd_seq_midi rc_pixelview snd_rawmidi tuner_simple tuner_types nouveau snd_seq_midi_event ir_lirc_codec tuner ttm lirc_dev tvaudio tda7432 snd_seq ir_sony_decoder drm_kms_helper snd_timer bttv v4l2_common videodev ir_jvc_decoder drm videobuf_dma_sg ir_rc6_decoder snd_seq_device videobuf_core ir_rc5_decoder snd ir_nec_decoder i2c_algo_bit btcx_risc rc_core tveeprom soundcore snd_page_alloc ppdev video parport_pc shpchp psmouse serio_raw lp parport usbhid hid firewire_ohci 8139too firewire_core floppy crc_itu_t

Pid: 4325, comm: Xorg Not tainted 2.6.38-7-generic #37-Ubuntu Compaq                          Presario PC                    /D850GB                         
EIP: 0060:[<c1313870>] EFLAGS: 00010246 CPU: 0
EIP is at con_shutdown+0x40/0x50
EAX: c02b8800 EBX: c02b8800 ECX: c204a638 EDX: c1313830
ESI: 00000000 EDI: 00000000 EBP: ceda9d2c ESP: ceda9d24
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process Xorg (pid: 4325, ti=ceda8000 task=c17e6500 task.ti=ceda8000)
Stack:
 c02b8800 c12ffb50 ceda9d38 c12ffb6a c02b8804 ceda9d48 c1273f3d c02b8800
 00000000 ceda9d50 c12ff909 ceda9d5c c12ffa46 c02b8800 ceda9de8 c1301f12
 0000c000 000000d0 00000000 00000007 00000000 c02b891c c02b8928 00000000
Call Trace:
 [<c12ffb50>] ? queue_release_one_tty+0x0/0x60
 [<c12ffb6a>] queue_release_one_tty+0x1a/0x60
 [<c1273f3d>] kref_put+0x2d/0x60
 [<c12ff909>] tty_kref_put+0x19/0x20
 [<c12ffa46>] release_tty+0x26/0x40
 [<c1301f12>] tty_release+0x332/0x4e0
 [<c150967f>] ? _raw_spin_lock_irqsave+0x2f/0x50
 [<c1050038>] ? console_unlock+0x98/0xe0
 [<c13022d0>] tty_open+0x210/0x420
 [<c112a805>] chrdev_open+0xa5/0x1c0
 [<c1125031>] __dentry_open+0xc1/0x280
 [<c112639e>] nameidata_to_filp+0x6e/0x80
 [<c112a760>] ? chrdev_open+0x0/0x1c0
 [<c11337ff>] finish_open+0xaf/0x1a0
 [<c11330a8>] ? do_path_lookup+0x68/0x120
 [<c1133e47>] do_filp_open+0x207/0x6e0
 [<c1041387>] ? enqueue_entity+0x247/0x2c0
 [<c1126406>] do_sys_open+0x56/0x120
 [<c104ca10>] ? sched_autogroup_create_attach+0xb0/0x120
 [<c11264fe>] sys_open+0x2e/0x40
 [<c1509904>] syscall_call+0x7/0xb
Code: 01 00 00 89 c3 85 f6 74 22 e8 4d c6 d3 ff c7 06 00 00 00 00 e8 42 c7 d3 ff 89 d8 e8 ab bf fe ff 8b 1c 24 8b 74 24 04 89 ec 5d c3 <0f> 0b 8d b4 
[drm] nouveau 0000:01:00.0: GPU lockup - switching to software fbcon
26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 3e 8d 
EIP: [<c1313870>] con_shutdown+0x40/0x50 SS:ESP 0068:ceda9d24
[drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Output VGA-1 is running on CRTC 0 using output A
---[ end trace 58cc84d841200747 ]---