1) I have Linux Mint 10(Julia) Gnome 32-bit edition
shurick@petit ~ $ uname -a
Linux petit 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux
My hardware is Acer Aspire One D255 Netbook.
2) I did not do anything special. I was just browsing in Firefox. I believe I had just opened new tab in that moment but I'm not sure. There were several applications opened: Gnome Terminal with a few tabs, Firefox with approximately 7-10 tabs, VLC player (it did not play anything in that moment). And one unusual thing - I had Ktorrent running from another computer with Gentoo using ssh -X. It was minimized to tray.
3) At some time all GUI interaction has stopped. I was not able to move mouse, system did not react on any keypresses, including Ctrl+Alt+F1 (F2, F3), Ctrl+Alt+Backspace and Ctrl+Alt+Del. However I was able to ping my netbook from another computer.
These lines are from my /var/log/messages file which may be useful:
Jan 23 19:41:14 petit kernel: [158244.298111] *pde = 3c973067
Jan 23 19:41:14 petit kernel: [158244.298140] Modules linked in: cifs usb_storage nls_iso8859_1 nls_cp437 vfat fat binfmt_misc parport_pc ppdev dm_crypt snd_hda_codec_realtek joydev snd_hda_intel snd_hda_codec arc4 snd_hwdep snd_pcm ath9k ath9k_common snd_seq_midi snd_rawmidi ath9k_hw ath snd_seq_midi_event snd_seq mac80211 snd_timer snd_seq_device uvcvideo snd psmouse cfg80211 videodev serio_raw v4l1_compat led_class soundcore snd_page_alloc lp parport dm_raid45 xor btrfs zlib_deflate crc32c libcrc32c i915 usbhid drm_kms_helper hid drm ahci intel_agp libahci i2c_algo_bit video atl1c agpgart output
Jan 23 19:41:14 petit kernel: [158244.298262]
Jan 23 19:41:14 petit kernel: [158244.298273] Pid: 783, comm: Xorg Not tainted 2.6.35-22-generic #33-Ubuntu AOD255 /AOD255
Jan 23 19:41:14 petit kernel: [158244.298284] EIP: 0060:[<f815b3ba>] EFLAGS: 00213206 CPU: 1
Jan 23 19:41:14 petit kernel: [158244.298322] EIP is at drm_ht_insert_item+0x2a/0xa0 [drm]
Jan 23 19:41:14 petit kernel: [158244.298331] EAX: f6b22e60 EBX: 0010ba90 ECX: 0000000d EDX: dc7600d8
Jan 23 19:41:14 petit kernel: [158244.298340] ESI: f8626014 EDI: 00aaaaaa EBP: ecb63e30 ESP: ecb63e24
Jan 23 19:41:14 petit kernel: [158244.298348] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jan 23 19:41:14 petit kernel: [158244.298370] dc7600c0 cb302a80 f6b22e40 ecb63e50 f83f44e0 00000000 000080d0 ecb63e50
Jan 23 19:41:14 petit kernel: [158244.298389] <0> 00000000 ecb63ec0 f728c000 ecb63e74 f83f4602 f6a3ac14 ecb63e74 f6a3ac14
Jan 23 19:41:14 petit kernel: [158244.298412] <0> dc7600c0 ed499900 f6a3ac00 c0106464 ecb63f50 f815398d 00000001 f8164d74
Jan 23 19:41:14 petit kernel: [158244.298485] [<f83f44e0>] ? i915_gem_create_mmap_offset+0xb0/0x120 [i915]
Jan 23 19:41:14 petit kernel: [158244.298534] [<f83f4602>] ? i915_gem_mmap_gtt_ioctl+0xb2/0x150 [i915]
Jan 23 19:41:14 petit kernel: [158244.298552] [<c0106464>] ? unmask_8259A+0x4/0x40
Jan 23 19:41:14 petit kernel: [158244.298597] [<f815398d>] ? drm_ioctl+0x1ad/0x430 [drm]
Jan 23 19:41:14 petit kernel: [158244.298625] [<c0106464>] ? unmask_8259A+0x4/0x40
Jan 23 19:41:14 petit kernel: [158244.298667] [<f83f4550>] ? i915_gem_mmap_gtt_ioctl+0x0/0x150 [i915]
Jan 23 19:41:14 petit kernel: [158244.298689] [<c0218534>] ? do_sync_read+0xa4/0xe0
Jan 23 19:41:14 petit kernel: [158244.298703] [<c032e626>] ? apparmor_file_permission+0x16/0x20
Jan 23 19:41:14 petit kernel: [158244.298717] [<c0302a74>] ? security_file_permission+0x14/0x20
Jan 23 19:41:14 petit kernel: [158244.298728] [<c02185d2>] ? rw_verify_area+0x62/0xd0
Jan 23 19:41:14 petit kernel: [158244.298739] [<c0106464>] ? unmask_8259A+0x4/0x40
Jan 23 19:41:14 petit kernel: [158244.298750] [<c0226622>] ? vfs_ioctl+0x32/0xb0
Jan 23 19:41:14 petit kernel: [158244.298791] [<f81537e0>] ? drm_ioctl+0x0/0x430 [drm]
Jan 23 19:41:14 petit kernel: [158244.298803] [<c0226eb9>] ? do_vfs_ioctl+0x79/0x2d0
Jan 23 19:41:14 petit kernel: [158244.298813] [<c0227177>] ? sys_ioctl+0x67/0x80
Jan 23 19:41:14 petit kernel: [158244.298826] [<c05c90a4>] ? syscall_call+0x7/0xb
Jan 23 19:41:14 petit kernel: [158244.298836] [<c0106464>] ? unmask_8259A+0x4/0x40
Jan 23 19:41:14 petit kernel: [158244.299011] ---[ end trace 537a205a598e7a00 ]---
Jan 23 19:46:31 petit kernel: [158561.089614] atkbd serio0: Unknown key pressed (translated set 2, code 0x93 on isa0060/serio0).
Jan 23 19:46:31 petit kernel: [158561.089631] atkbd serio0: Use 'setkeycodes e013 <keycode>' to make it known.
Jan 23 19:46:31 petit kernel: [158561.092960] atkbd serio0: Unknown key released (translated set 2, code 0x93 on isa0060/serio0).
Jan 23 19:46:31 petit kernel: [158561.092974] atkbd serio0: Use 'setkeycodes e013 <keycode>' to make it known.
Jan 23 19:46:32 petit kernel: [158562.087146] atkbd serio0: Unknown key pressed (translated set 2, code 0x93 on isa0060/serio0).
Jan 23 19:46:32 petit kernel: [158562.087162] atkbd serio0: Use 'setkeycodes e013 <keycode>' to make it known.
Jan 23 19:46:32 petit kernel: [158562.091772] atkbd serio0: Unknown key released (translated set 2, code 0x93 on isa0060/serio0).
Jan 23 19:46:32 petit kernel: [158562.091787] atkbd serio0: Use 'setkeycodes e013 <keycode>' to make it known.
Jan 23 19:46:33 petit kernel: [158563.084111] cfg80211: Calling CRDA to update world regulatory domain
Please see other logs in the attachment.
4) Normal GUI behaviour was expected.
5) It happened once.
Looks to be a crash in the Intel i915 driver