Comment 3 for bug 747187

I have the same problem as mentioned in the original post - It also happens when coming out of sleep mode:

Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473387] kernel BUG at /build/buildd/linux-2.6.35/drivers/gpu/drm/i915/i915_gem.c:4224!
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473391] invalid opcode: 0000 [#1] SMP
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473395] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:05.0/rf_kill
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473399] Modules linked in: btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs exportfs reiserfs pppoe pppox aes_i586 aes_generic lib80211_crypt_ccmp binfmt_misc dm_crypt joydev snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event ipw2200 snd_seq pcmcia libipw snd_timer snd_seq_device cfg80211 ppdev irda snd yenta_socket fujitsu_laptop parport_pc pcmcia_rsrc psmouse pcmcia_core crc_ccitt serio_raw led_class lib80211 soundcore snd_page_alloc lp parport i915 drm_kms_helper drm ahci intel_agp firewire_ohci tg3 libahci i2c_algo_bit video firewire_core crc_itu_t agpgart output ramzswap(C) lzo_compress
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473456]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473461] Pid: 32462, comm: Xorg Tainted: G C 2.6.35-28-generic #50-Ubuntu FJNB19C/LIFEBOOK S7020
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473465] EIP: 0060:[<f83cd66b>] EFLAGS: 00013286 CPU: 0
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473484] EIP is at i915_gem_object_unpin+0xbb/0xd0 [i915]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473487] EAX: f6a46900 EBX: f69f8c00 ECX: 000244ff EDX: fffffff9
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473490] ESI: 00024000 EDI: f71ce000 EBP: e0fa1dc8 ESP: e0fa1dbc
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473493] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473497] Process Xorg (pid: 32462, ti=e0fa0000 task=e0ca32c0 task.ti=e0fa0000)
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473500] Stack:
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473502] 00000002 00000003 ca82cb90 e0fa1e4c f83d347b f71ce014 0244c000 00000000
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473509] <0> 00000004 e893e480 00000000 f01a4000 e0fa1e24 00000001 00000003 00000000
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473516] <0> 0244c000 00000003 f69f8c14 ca82cb90 f71ce014 ca82cb90 00000000 f71ce000
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473524] Call Trace:
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473544] [<f83d347b>] ? i915_gem_do_execbuffer+0x71b/0xca0 [i915]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473562] [<f83d43fa>] ? i915_gem_execbuffer2+0x4a/0x1b0 [i915]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473580] [<f83d442c>] ? i915_gem_execbuffer2+0x7c/0x1b0 [i915]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473602] [<f824498d>] ? drm_ioctl+0x1ad/0x430 [drm]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473620] [<f83d43b0>] ? i915_gem_execbuffer2+0x0/0x1b0 [i915]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473634] [<c05ce20d>] ? do_page_fault+0x1cd/0x440
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473640] [<c0227152>] ? vfs_ioctl+0x32/0xb0
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473651] [<f82447e0>] ? drm_ioctl+0x0/0x430 [drm]
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473655] [<c02279e9>] ? do_vfs_ioctl+0x79/0x2d0
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473662] [<c0218d30>] ? do_sync_write+0x0/0xe0
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473665] [<c0227ca7>] ? sys_ioctl+0x67/0x80
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473670] [<c05caeb4>] ? syscall_call+0x7/0xb
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473672] Code: d1 8b 50 5c 8d 48 58 8b 70 58 89 56 04 89 32 8b 97 00 10 00 00 89 8f 00 10 00 00 81 c7 fc 0f 00 00 89 78 58 89 50 5c 89 0a eb a7 <0f> 0b eb fe 0f 0b eb fe 8d b6 00 00 00 00 8d bc 27 00 00 00 00
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473711] EIP: [<f83cd66b>] i915_gem_object_unpin+0xbb/0xd0 [i915] SS:ESP 0068:e0fa1dbc
Jun 22 21:37:28 LIFEBOOK-S7020 kernel: [403769.473731] ---[ end trace f71b9f4513c2e31f ]---