BUG: unable to handle kernel NULL pointer dereference at 00000078
IP: [<c0136033>] mutex_spin_on_owner+0x13/0xa0
*pde = b9e84067 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/enable
Modules linked in: binfmt_misc parport_pc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_atihdmi snd_hda_codec_idt vga16fb vgastate ipt_REJECT ipt_LOG xt_limit xt_tcpudp ipt_addrtype xt_state arc4 ip6table_filter ip6_tables nf_nat_irc iwlagn nf_conntrack_irc nf_nat_ftp nf_nat snd_hda_intel nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_ftp snd_hda_codec radeon snd_hwdep snd_pcm nf_conntrack i915 iptable_filter snd_seq_midi snd_rawmidi ip_tables iwlcore x_tables snd_seq_midi_event ttm mac80211 snd_seq drm_kms_helper uvcvideo snd_timer snd_seq_device joydev wacom cfg80211 hp_wmi videodev v4l1_compat drm intel_agp snd psmouse serio_raw uinput i2c_algo_bit video soundcore snd_page_alloc agpgart hp_accel lis3lv02d input_polldev output led_class lp parport usbhid hid usb_storage ahci libahci r8169 mii

Pid: 370, comm: plymouthd Not tainted 2.6.35-9-generic #14-Ubuntu 3661/HP TouchSmart tm2 Notebook PC
EIP: 0060:[<c0136033>] EFLAGS: 00010202 CPU: 0
EIP is at mutex_spin_on_owner+0x13/0xa0
EAX: f71cf008 EBX: f71cf008 ECX: c03e3d10 EDX: 00000068
ESI: 00000068 EDI: f71cf018 EBP: f6afdef8 ESP: f6afdef0
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process plymouthd (pid: 370, ti=f6afc000 task=f68ae580 task.ti=f6afc000)
Stack:
 f71cf008 00000068 f6afdf24 c05cb113 cb37fa20 f68ae580 f68ae580 cb37fa80
<0> c1803a48 00000007 f71cf008 f71cf008 f6e664c8 f6afdf34 c05cb0b5 f71cf000
<0> f71cf008 f6afdf44 c03e3d2f f6bdb600 00000008 f6afdf74 c021a12f 00000003
Call Trace:
 [<c05cb113>] ? __mutex_lock_slowpath+0x43/0x140
 [<c05cb0b5>] ? mutex_lock+0x25/0x40
 [<c03e3d2f>] ? fb_release+0x1f/0x60
 [<c021a12f>] ? __fput+0xdf/0x1f0
 [<c021a25d>] ? fput+0x1d/0x30
 [<c0216b4c>] ? filp_close+0x4c/0x80
 [<c0216bf5>] ? sys_close+0x75/0xc0
 [<c05cc7fc>] ? syscall_call+0x7/0xb
Code: 7c 08 81 f9 ff 03 00 00 77 c5 be 01 00 00 00 90 eb c5 8d b6 00 00 00 00 55 89 e5 56 53 0f 1f 44 00 00 f6 05 c1 92 82 c0 20 74 7d <8b> 4a 10 83 f9 07 77 75 8b 1d 6c c3 5d c0 0f a3 0b 19 db 85 db 
EIP: [<c0136033>] mutex_spin_on_owner+0x13/0xa0 SS:ESP 0068:f6afdef0
CR2: 0000000000000078
---[ end trace 33264e613774da50 ]---