------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/lib/kref.c:34 kref_get+0x21/0x30()
Hardware name: 901
Modules linked in: aes_i586 aes_generic binfmt_misc snd_hda_codec_realtek parport_pc ppdev joydev snd_hda_intel rt2860sta(C) snd_hda_codec snd_hwdep i915 arc4 snd_pcm rt2800pci snd_seq_midi rt2800lib rt2x00usb rt2x00pci snd_rawmidi crc_ccitt drm_kms_helper rt2x00lib snd_seq_midi_event mac80211 snd_seq snd_timer drm uvcvideo snd_seq_device videodev cfg80211 snd v4l1_compat psmouse intel_agp serio_raw eeepc_laptop i2c_algo_bit soundcore eeprom_93cx6 video sparse_keymap snd_page_alloc agpgart output led_class lp parport usb_storage atl1e
Pid: 1137, comm: Xorg Tainted: G         C  2.6.35-10-generic #15-Ubuntu
Call Trace:
 [<c014a6d2>] warn_slowpath_common+0x72/0xa0
 [<c03562d1>] ? kref_get+0x21/0x30
 [<c03562d1>] ? kref_get+0x21/0x30
 [<c014a722>] warn_slowpath_null+0x22/0x30
 [<c03562d1>] kref_get+0x21/0x30
 [<f81bd293>] drm_gem_handle_create+0x83/0xa0 [drm]
 [<c05c84e9>] ? mutex_lock+0x19/0x40
 [<f841c9c5>] intel_user_framebuffer_create_handle+0x15/0x20 [i915]
 [<f81c68b9>] drm_mode_getfb+0x69/0xa0 [drm]
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
 [<f81bb987>] drm_ioctl+0x1a7/0x400 [drm]
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
 [<f81c6850>] ? drm_mode_getfb+0x0/0xa0 [drm]
 [<c032e307>] ? apparmor_file_permission+0x17/0x20
 [<c0302114>] ? security_file_permission+0x14/0x20
 [<c0217d52>] ? rw_verify_area+0x62/0xd0
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
 [<c0225de2>] vfs_ioctl+0x32/0xb0
 [<f81bb7e0>] ? drm_ioctl+0x0/0x400 [drm]
 [<c0226679>] do_vfs_ioctl+0x79/0x2d0
 [<c0217b30>] ? do_sync_write+0x0/0xe0
 [<c0226937>] sys_ioctl+0x67/0x80
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
 [<c05c9c14>] syscall_call+0x7/0xb
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
 [<c01c64ad>] ? event_enable_read+0x1d/0x40
---[ end trace a9432fa8149dd239 ]---