Comment 7 for bug 828761

Sorry, forgot to mention
lightdm:
  Installed: 0.9.3-0ubuntu5
  Candidate: 0.9.3-0ubuntu5
  Version table:
 *** 0.9.3-0ubuntu5 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

M880G [Mobility Radeon HD 4200]

Unsure if it's related, I've closed laptop cover twice in order to test the delay of login window, reviewed syslog which prints:

Aug 22 22:44:56 kernel: [ 5867.930513] ------------[ cut here ]------------
Aug 22 22:44:56 kernel: [ 5867.930520] WARNING: at /build/buildd/linux-3.0.0/kernel/power/suspend_test.c:53 suspend_test_finish+0x86/0x90()
Aug 22 22:44:56 kernel: [ 5867.930522] Hardware name: HP 625
Aug 22 22:44:56 kernel: [ 5867.930524] Component: resume devices, time: 11590
Aug 22 22:44:56 kernel: [ 5867.930525] Modules linked in: rfcomm bnep parport_pc ppdev binfmt_misc snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep wl(P) snd_pcm lib80211 bcma arc4 uvcvideo videodev radeon v4l2_compat_ioctl32 snd_seq_midi joydev snd_rawmidi snd_seq_midi_event ttm snd_seq drm_kms_helper brcmsmac(C) drm snd_timer snd_seq_device brcmutil(C) snd mac80211 btusb psmouse soundcore serio_raw bluetooth cfg80211 i2c_algo_bit snd_page_alloc video crc_ccitt sp5100_tco edac_core k10temp i2c_piix4 edac_mce_amd hp_wmi shpchp sparse_keymap wmi lp parport r8169 ahci libahci
Aug 22 22:44:56 kernel: [ 5867.930560] Pid: 8274, comm: pm-suspend Tainted: P WC 3.0.0-9-generic #12-Ubuntu
Aug 22 22:44:56 kernel: [ 5867.930563] Call Trace:
Aug 22 22:44:56 kernel: [ 5867.930568] [<ffffffff8105e7af>] warn_slowpath_common+0x7f/0xc0
Aug 22 22:44:56 kernel: [ 5867.930571] [<ffffffff8105e8a6>] warn_slowpath_fmt+0x46/0x50
Aug 22 22:44:56 kernel: [ 5867.930573] [<ffffffff810a2186>] suspend_test_finish+0x86/0x90
Aug 22 22:44:56 kernel: [ 5867.930576] [<ffffffff810a1e8a>] suspend_devices_and_enter+0xca/0x1b0
Aug 22 22:44:56 kernel: [ 5867.930579] [<ffffffff810a208d>] enter_state+0x11d/0x150
Aug 22 22:44:56 kernel: [ 5867.930581] [<ffffffff810a14b7>] state_store+0xb7/0xf0
Aug 22 22:44:56 kernel: [ 5867.930585] [<ffffffff812db01f>] kobj_attr_store+0xf/0x30
Aug 22 22:44:56 kernel: [ 5867.930588] [<ffffffff811d56cf>] sysfs_write_file+0xef/0x170
Aug 22 22:44:56 kernel: [ 5867.930592] [<ffffffff811662c3>] vfs_write+0xb3/0x180
Aug 22 22:44:56 kernel: [ 5867.930594] [<ffffffff811665ea>] sys_write+0x4a/0x90
Aug 22 22:44:56 kernel: [ 5867.930598] [<ffffffff815e25c2>] system_call_fastpath+0x16/0x1b
Aug 22 22:44:56 kernel: [ 5867.930600] ---[ end trace 65750b4f27b1e285 ]---
Aug 22 22:44:56 kernel: [ 5867.931264] PM: Finishing wakeup.
Aug 22 20:44:56 rtkit-daemon[1367]: The canary thread is apparently starving. Taking action.