[   25.389157] Skipping EDID probe due to cached edid
[   25.844140] Skipping EDID probe due to cached edid
[   28.489560] vboxdrv: Trying to deactivate the NMI watchdog permanently...
[   28.489566] vboxdrv: Warning: 2.6.31+ kernel detected. Most likely the hardware performance
[   28.489568] vboxdrv: counter framework which can generate NMIs is active. You have to prevent
[   28.489570] vboxdrv: the usage of hardware performance counters by
[   28.489571] vboxdrv:   echo 2 > /proc/sys/kernel/perf_counter_paranoid
[   28.489574] vboxdrv: Found 2 processor cores.
[   28.489690] vboxdrv: fAsync=0 offMin=0x1c7 offMax=0x16b3
[   28.489746] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
[   28.489749] vboxdrv: Successfully loaded version 3.2.8_OSE (interface 0x00140001).
[   29.005229] Skipping EDID probe due to cached edid
[   29.457161] Skipping EDID probe due to cached edid
[   29.529753] ppdev: user-space parallel port driver
[   29.792054] eth1: no IPv6 routers present
[   31.208089] eth0: no IPv6 routers present
[   44.742826] ata3.00: configured for UDMA/133
[   44.742833] ata3: EH complete
[   52.784062] EXT4-fs (sda6): re-mounted. Opts: commit=0
[   68.658449] ------------[ cut here ]------------
[   68.658465] WARNING: at /build/buildd/linux-2.6.35/lib/kref.c:34 kref_get+0x21/0x30()
[   68.658468] Hardware name: Aspire 5720Z    
[   68.658470] Modules linked in: binfmt_misc parport_pc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi i915 snd_rawmidi snd_seq_midi_event snd_seq joydev lib80211_crypt_tkip drm_kms_helper wl(P) snd_timer snd_seq_device r852 drm sm_common nand nand_ids nand_ecc mtd lirc_ene0100(+) i2c_algo_bit intel_agp lirc_dev video snd soundcore snd_page_alloc psmouse serio_raw lib80211 agpgart output lp parport usbhid hid usb_storage firewire_ohci ahci firewire_core sdhci_pci tg3 sdhci led_class crc_itu_t libahci
[   68.658539] Pid: 1056, comm: Xorg Tainted: P      D     2.6.35-17-generic #23-Ubuntu
[   68.658543] Call Trace:
[   68.658552]  [<c014a812>] warn_slowpath_common+0x72/0xa0
[   68.658556]  [<c03528f1>] ? kref_get+0x21/0x30
[   68.658560]  [<c03528f1>] ? kref_get+0x21/0x30
[   68.658565]  [<c014a862>] warn_slowpath_null+0x22/0x30
[   68.658568]  [<c03528f1>] kref_get+0x21/0x30
[   68.658586]  [<f81ce2a3>] drm_gem_handle_create+0x83/0xa0 [drm]
[   68.658593]  [<c05c6199>] ? mutex_lock+0x19/0x40
[   68.658611]  [<f82ea755>] intel_user_framebuffer_create_handle+0x15/0x20 [i915]
[   68.658627]  [<f81d78c9>] drm_mode_getfb+0x69/0xa0 [drm]
[   68.658633]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658645]  [<f81cc987>] drm_ioctl+0x1a7/0x400 [drm]
[   68.658650]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658662]  [<f81d7860>] ? drm_mode_getfb+0x0/0xa0 [drm]
[   68.658669]  [<c032e006>] ? apparmor_file_permission+0x16/0x20
[   68.658675]  [<c03024d4>] ? security_file_permission+0x14/0x20
[   68.658681]  [<c0218082>] ? rw_verify_area+0x62/0xd0
[   68.658685]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658691]  [<c02260d2>] vfs_ioctl+0x32/0xb0
[   68.658702]  [<f81cc7e0>] ? drm_ioctl+0x0/0x400 [drm]
[   68.658706]  [<c0226969>] do_vfs_ioctl+0x79/0x2d0
[   68.658710]  [<c0226c27>] sys_ioctl+0x67/0x80
[   68.658714]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658718]  [<c05c78c4>] syscall_call+0x7/0xb
[   68.658723]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658727]  [<c01c64ad>] ? event_format_read+0xcd/0x280
[   68.658730] ---[ end trace 4928562ce252ec86 ]---
[   68.705074] Skipping EDID probe due to cached edid
[  100.573115] Skipping EDID probe due to cached edid
[  100.956080] Skipping EDID probe due to cached edid
[  101.317106] Skipping EDID probe due to cached edid
[  109.156066] Skipping EDID probe due to cached edid