BUG: unable to handle kernel NULL pointer dereference at 000000fc
IP: [<f877f911>] intel_release_load_detect_pipe+0x21/0xa0 [i915]
*pde = 2dbc3067 *pte = 00000000 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/module/bluetooth/initstate
Modules linked in: sco bnep l2cap parport_pc ppdev snd_hda_codec_realtek arc4 snd_hda_intel iwlagn snd_hda_codec snd_hwdep i915 joydev snd_pcm snd_seq_midi iwlcore drm_kms_helper snd_rawmidi mac80211 snd_seq_midi_event snd_seq i2400m_usb snd_timer drm snd_seq_device option btusb i2400m uvcvideo usb_wwan bluetooth cfg80211 intel_agp usbserial wimax videodev psmouse eeepc_laptop snd v4l1_compat i2c_algo_bit serio_raw video sparse_keymap soundcore output led_class agpgart snd_page_alloc lp parport btrfs atl2 zlib_deflate usb_storage crc32c libcrc32c

Pid: 1000, comm: Xorg Not tainted 2.6.35-22-generic #33-Ubuntu 900/900
EIP: 0060:[<f877f911>] EFLAGS: 00013292 CPU: 0
EIP is at intel_release_load_detect_pipe+0x21/0xa0 [i915]
EAX: f8797a40 EBX: f1c9c800 ECX: 00000003 EDX: f256e400
ESI: 00000000 EDI: f256ec00 EBP: f2e0fcb0 ESP: f2e0fc98
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process Xorg (pid: 1000, ti=f2e0e000 task=f2d4b2c0 task.ti=f2e0e000)
Stack:
 7f0000aa f8797a40 ffffffff f1c9c800 ffffffff f2e0fd98 f2e0fda8 f878c539
<0> f2e0fcc8 00000001 f1c9c850 f256e400 00000003 00000000 00000000 00000000
<0> 00000000 4353544e 30383420 00000069 00000000 00000000 00000000 00000000
Call Trace:
 [<f878c539>] ? intel_tv_detect+0xa9/0x1b0 [i915]
 [<f80e478e>] ? drm_helper_probe_single_connector_modes+0x26e/0x310 [drm_kms_helper]
 [<f841c0ce>] ? drm_mode_object_find+0x4e/0x70 [drm]
 [<f841cee7>] ? drm_mode_getconnector+0x2e7/0x380 [drm]
 [<c012ce0a>] ? __ticket_spin_is_contended+0x1a/0x20
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<f841198d>] ? drm_ioctl+0x1ad/0x430 [drm]
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<f841cc00>] ? drm_mode_getconnector+0x0/0x380 [drm]
 [<c05c8b6d>] ? _raw_spin_lock+0xd/0x10
 [<c02306cf>] ? mntput_no_expire+0x1f/0xd0
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<c0226622>] ? vfs_ioctl+0x32/0xb0
 [<f84117e0>] ? drm_ioctl+0x0/0x430 [drm]
 [<c0226eb9>] ? do_vfs_ioctl+0x79/0x2d0
 [<c0219f9d>] ? fput+0x1d/0x30
 [<c0227177>] ? sys_ioctl+0x67/0x80
 [<c02169c5>] ? sys_close+0x75/0xc0
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<c05c90a4>] ? syscall_call+0x7/0xb
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<c04c64a7>] ? register_snapshot+0x237/0x260
 [<c05c0000>] ? print_cpu_info+0x2/0x129
Code: 96 fe ff ff 5d c3 8d 74 26 00 55 89 e5 83 ec 18 89 5d f4 89 75 f8 89 7d fc 0f 1f 44 00 00 8b 70 20 8b 38 89 c3 8b 40 28 89 45 ec <8b> 86 fc 00 00 00 89 45 f0 80 7b 3c 00 75 28 80 7e 18 00 74 15 
EIP: [<f877f911>] intel_release_load_detect_pipe+0x21/0xa0 [i915] SS:ESP 0068:f2e0fc98
CR2: 00000000000000fc
---[ end trace db516f571f6da9d2 ]---