BUG: unable to handle kernel NULL pointer dereference at 00000108
IP: [<f86f5b9d>] intel_release_load_detect_pipe+0x2d/0xc0 [i915]
*pde = 7b62a067 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/virtual/backlight/acpi_video0/actual_brightness
Modules linked in: binfmt_misc snd_hda_codec_intelhdmi snd_hda_codec_conexant fbcon tileblit font bitblit softcursor vga16fb vgastate ppdev joydev arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device i915 ath5k drm_kms_helper mac80211 ath drm snd intel_agp psmouse serio_raw cfg80211 led_class soundcore i2c_algo_bit agpgart snd_page_alloc video output lp parport usb_storage r8169 mii ahci

Pid: 1901, comm: Xorg Not tainted (2.6.32-17-generic #26-Ubuntu) Compaq Presario CQ60 Notebook PC
EIP: 0060:[<f86f5b9d>] EFLAGS: 00013286 CPU: 0
EIP is at intel_release_load_detect_pipe+0x2d/0xc0 [i915]
EAX: f870d300 EBX: f4f67000 ECX: 04040404 EDX: f4d81000
ESI: 00000000 EDI: 00000003 EBP: f4ecbcb8 ESP: f4ecbca0
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process Xorg (pid: 1901, ti=f4eca000 task=f4e3b340 task.ti=f4eca000)
Stack:
 7f0000aa 70000000 f870d300 f4f67000 ffffffff f4ecbda0 f4ecbdb0 f870397f
<0> ffffffff 00000000 f4f67318 f8293f48 00000003 00000000 00000000 00000000
<0> 00000000 4353544e 30383420 00000069 00000000 00000000 00000000 00000000
Call Trace:
 [<f870397f>] ? intel_tv_detect+0x8f/0x1c0 [i915]
 [<f820ceee>] ? drm_helper_probe_single_connector_modes+0x26e/0x300 [drm_kms_helper]
 [<f8284d5e>] ? drm_mode_object_find+0x4e/0x70 [drm]
 [<f8285b7f>] ? drm_mode_getconnector+0x2df/0x380 [drm]
 [<c01cb660>] ? __generic_file_aio_write+0x1f0/0x510
 [<c04c64a7>] ? T.722+0x27/0x70
 [<f827a7cd>] ? drm_ioctl+0x25d/0x3e0 [drm]
 [<c04c64a7>] ? T.722+0x27/0x70
 [<f82858a0>] ? drm_mode_getconnector+0x0/0x380 [drm]
 [<c058acbd>] ? _spin_lock+0xd/0x10
 [<c02f3d94>] ? security_file_permission+0x14/0x20
 [<f827a570>] ? drm_ioctl+0x0/0x3e0 [drm]
 [<c0216001>] ? vfs_ioctl+0x21/0x90
 [<c02162e9>] ? do_vfs_ioctl+0x79/0x310
 [<c0207640>] ? do_sync_write+0x0/0x100
 [<c02165e7>] ? sys_ioctl+0x67/0x80
 [<c04c64a7>] ? T.722+0x27/0x70
 [<c01033ec>] ? syscall_call+0x7/0xb
 [<c04c64a7>] ? T.722+0x27/0x70
 [<c04c64a7>] ? T.722+0x27/0x70
Code: e5 83 ec 18 89 5d f4 89 75 f8 89 7d fc 0f 1f 44 00 00 8b b0 ec 02 00 00 89 c3 89 d7 8b 90 cc 02 00 00 8b 80 f4 02 00 00 89 45 f0 <8b> 8e 08 01 00 00 80 bb 04 03 00 00 00 75 2c 80 7e 18 00 74 12 
EIP: [<f86f5b9d>] intel_release_load_detect_pipe+0x2d/0xc0 [i915] SS:ESP 0068:f4ecbca0
CR2: 0000000000000108
---[ end trace 6d31d7f4133c4fa8 ]---