Public bug reported:

My networking stopped working suddenly. I've opened a terminal and typed
'sudo -i' and nothing happened. I clicked on power menu and choosed
reboot, but it didn't  reboot. Ctrl+Alt+F1 didn't work. Neither
Ctrl+Alt+Del did. I've reboot the notebook with Alt+Prt Sc+B and looked
the kern.log file (attached).

The relevent information (I think):

Dec 15 14:29:38 galaxy kernel: [  496.851699] BUG: scheduling while atomic: 
kworker/u:4/220/0x00000100
Dec 15 14:29:38 galaxy kernel: [  496.851705] Modules linked in: bnep rfcomm 
pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv parport_pc ppdev binfmt_misc 
joydev dm_crypt snd_hda_codec_hdmi snd_hda_codec_idt btusb bluetooth 
sparse_keymap snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi 
snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device jmb38x_ms 
memstick psmouse snd arc4 rt2800pci rt2800lib serio_raw crc_ccitt rt2x00pci 
rt2x00lib mac80211 intel_ips cfg80211 eeprom_93cx6 soundcore snd_page_alloc lp 
parport wmi i915 sdhci_pci sdhci drm_kms_helper ahci libahci drm jme 
i2c_algo_bit video
Dec 15 14:29:38 galaxy kernel: [  496.851774] CPU 0 
Dec 15 14:29:38 galaxy kernel: [  496.851776] Modules linked in: bnep rfcomm 
pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv parport_pc ppdev binfmt_misc 
joydev dm_crypt snd_hda_codec_hdmi snd_hda_codec_idt btusb bluetooth 
sparse_keymap snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi 
snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device jmb38x_ms 
memstick psmouse snd arc4 rt2800pci rt2800lib serio_raw crc_ccitt rt2x00pci 
rt2x00lib mac80211 intel_ips cfg80211 eeprom_93cx6 soundcore snd_page_alloc lp 
parport wmi i915 sdhci_pci sdhci drm_kms_helper ahci libahci drm jme 
i2c_algo_bit video
Dec 15 14:29:38 galaxy kernel: [  496.851827] 
Dec 15 14:29:38 galaxy kernel: [  496.851832] Pid: 220, comm: kworker/u:4 Not 
tainted 3.0.0-13-generic #22-Ubuntu OEM                       B14HM21           
           /B14HM21                      
Dec 15 14:29:38 galaxy kernel: [  496.851840] RIP: 0010:[<ffffffffa01296ce>]  
[<ffffffffa01296ce>] rt2x00pci_regbusy_read+0x6e/0xf0 [rt2x00pci]
Dec 15 14:29:38 galaxy kernel: [  496.851853] RSP: 0018:ffff8801a08c5b60  
EFLAGS: 00000282
Dec 15 14:29:38 galaxy kernel: [  496.851856] RAX: 0000000000030200 RBX: 
ffff8801a58eae40 RCX: ffff8801a08c5bcc
Dec 15 14:29:38 galaxy kernel: [  496.851860] RDX: 0000000000000001 RSI: 
0000000000007010 RDI: ffff88018e099d40
Dec 15 14:29:38 galaxy kernel: [  496.851863] RBP: ffff8801a08c5ba0 R08: 
0000000000000001 R09: 00000011d0c106de
Dec 15 14:29:38 galaxy kernel: [  496.851867] R10: 0000000000000001 R11: 
ffff8801a58eae88 R12: ffffffff815ea90e
Dec 15 14:29:38 galaxy kernel: [  496.851870] R13: 0000000000000000 R14: 
ffff8801afc12a40 R15: 0000000000000000
Dec 15 14:29:38 galaxy kernel: [  496.851875] FS:  0000000000000000(0000) 
GS:ffff8801afc00000(0000) knlGS:0000000000000000
Dec 15 14:29:38 galaxy kernel: [  496.851879] CS:  0010 DS: 0000 ES: 0000 CR0: 
000000008005003b
Dec 15 14:29:38 galaxy kernel: [  496.851882] CR2: 00007f2c53dd1e64 CR3: 
0000000001a03000 CR4: 00000000000006f0
Dec 15 14:29:38 galaxy kernel: [  496.851886] DR0: 0000000000000000 DR1: 
0000000000000000 DR2: 0000000000000000
Dec 15 14:29:38 galaxy kernel: [  496.851890] DR3: 0000000000000000 DR6: 
00000000ffff0ff0 DR7: 0000000000000400
Dec 15 14:29:38 galaxy kernel: [  496.851894] Process kworker/u:4 (pid: 220, 
threadinfo ffff8801a08c4000, task ffff8801a0fa2e40)
Dec 15 14:29:38 galaxy kernel: [  496.851897] Stack:
Dec 15 14:29:38 galaxy kernel: [  496.851900]  00000000ff000000 
0000000000007010 ffff8801a08c5b80 ffff88018e099d40
Dec 15 14:29:38 galaxy kernel: [  496.851906]  0000000000000001 
ffff88018e09a170 0000000000000001 00000000000000ff
Dec 15 14:29:38 galaxy kernel: [  496.851911]  ffff8801a08c5c00 
ffffffffa020b1d1 ffff8801a08c5c68 30ff880100000001
Dec 15 14:29:38 galaxy kernel: [  496.851917] Call Trace:
Dec 15 14:29:38 galaxy kernel: [  496.851927]  [<ffffffffa020b1d1>] 
rt2800_mcu_request.part.27+0x61/0xe0 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.851937]  [<ffffffffa020b275>] 
rt2800_mcu_request+0x25/0x30 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.851944]  [<ffffffffa0238a5f>] 
rt2800pci_set_state+0x5f/0x90 [rt2800pci]
Dec 15 14:29:38 galaxy kernel: [  496.851951]  [<ffffffffa0239305>] 
rt2800pci_set_device_state+0xe5/0x15c [rt2800pci]
Dec 15 14:29:38 galaxy kernel: [  496.851959]  [<ffffffffa020a736>] 
rt2800_config_ps.isra.21+0x96/0xf0 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.851967]  [<ffffffffa020b0b0>] 
rt2800_config+0x60/0x120 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.851976]  [<ffffffffa0176944>] 
rt2x00lib_config+0xe4/0x2c0 [rt2x00lib]
Dec 15 14:29:38 galaxy kernel: [  496.852003]  [<ffffffffa01a63d5>] ? 
ieee80211_wake_queue_by_reason+0x55/0x70 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852013]  [<ffffffffa0175fb8>] 
rt2x00mac_config+0x48/0x80 [rt2x00lib]
Dec 15 14:29:38 galaxy kernel: [  496.852027]  [<ffffffffa0184407>] 
ieee80211_hw_config+0x117/0x220 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852046]  [<ffffffffa01917ce>] 
ieee80211_dynamic_ps_enable_work+0x16e/0x3f0 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852064]  [<ffffffffa0191660>] ? 
ieee80211_dynamic_ps_disable_work+0x50/0x50 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852073]  [<ffffffff8107c04a>] 
process_one_work+0x11a/0x480
Dec 15 14:29:38 galaxy kernel: [  496.852078]  [<ffffffff8107cdf5>] 
worker_thread+0x165/0x370
Dec 15 14:29:38 galaxy kernel: [  496.852083]  [<ffffffff8107cc90>] ? 
manage_workers.isra.30+0x130/0x130
Dec 15 14:29:38 galaxy kernel: [  496.852088]  [<ffffffff8108129c>] 
kthread+0x8c/0xa0
Dec 15 14:29:38 galaxy kernel: [  496.852095]  [<ffffffff815f38e4>] 
kernel_thread_helper+0x4/0x10
Dec 15 14:29:38 galaxy kernel: [  496.852100]  [<ffffffff81081210>] ? 
flush_kthread_worker+0xa0/0xa0
Dec 15 14:29:38 galaxy kernel: [  496.852105]  [<ffffffff815f38e0>] ? 
gs_change+0x13/0x13
Dec 15 14:29:38 galaxy kernel: [  496.852108] Code: 48 89 45 c0 eb 17 0f 1f 80 
00 00 00 00 bf bc 8d 06 00 e8 f6 9e 1c e1 41 83 ee 01 74 30 48 8b 45 c8 49 03 
84 24 28 04 00 00 8b 00 
Dec 15 14:29:38 galaxy kernel: [  496.852215] Call Trace:
Dec 15 14:29:38 galaxy kernel: [  496.852226]  [<ffffffffa020b1d1>] 
rt2800_mcu_request.part.27+0x61/0xe0 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.852238]  [<ffffffffa020b275>] 
rt2800_mcu_request+0x25/0x30 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.852247]  [<ffffffffa0238a5f>] 
rt2800pci_set_state+0x5f/0x90 [rt2800pci]
Dec 15 14:29:38 galaxy kernel: [  496.852256]  [<ffffffffa0239305>] 
rt2800pci_set_device_state+0xe5/0x15c [rt2800pci]
Dec 15 14:29:38 galaxy kernel: [  496.852267]  [<ffffffffa020a736>] 
rt2800_config_ps.isra.21+0x96/0xf0 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.852277]  [<ffffffffa020b0b0>] 
rt2800_config+0x60/0x120 [rt2800lib]
Dec 15 14:29:38 galaxy kernel: [  496.852289]  [<ffffffffa0176944>] 
rt2x00lib_config+0xe4/0x2c0 [rt2x00lib]
Dec 15 14:29:38 galaxy kernel: [  496.852316]  [<ffffffffa01a63d5>] ? 
ieee80211_wake_queue_by_reason+0x55/0x70 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852329]  [<ffffffffa0175fb8>] 
rt2x00mac_config+0x48/0x80 [rt2x00lib]
Dec 15 14:29:38 galaxy kernel: [  496.852347]  [<ffffffffa0184407>] 
ieee80211_hw_config+0x117/0x220 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852369]  [<ffffffffa01917ce>] 
ieee80211_dynamic_ps_enable_work+0x16e/0x3f0 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852392]  [<ffffffffa0191660>] ? 
ieee80211_dynamic_ps_disable_work+0x50/0x50 [mac80211]
Dec 15 14:29:38 galaxy kernel: [  496.852401]  [<ffffffff8107c04a>] 
process_one_work+0x11a/0x480
Dec 15 14:29:38 galaxy kernel: [  496.852407]  [<ffffffff8107cdf5>] 
worker_thread+0x165/0x370
Dec 15 14:29:38 galaxy kernel: [  496.852413]  [<ffffffff8107cc90>] ? 
manage_workers.isra.30+0x130/0x130
Dec 15 14:29:38 galaxy kernel: [  496.852419]  [<ffffffff8108129c>] 
kthread+0x8c/0xa0
Dec 15 14:29:38 galaxy kernel: [  496.852425]  [<ffffffff815f38e4>] 
kernel_thread_helper+0x4/0x10
Dec 15 14:29:38 galaxy kernel: [  496.852432]  [<ffffffff81081210>] ? 
flush_kthread_worker+0xa0/0xa0
Dec 15 14:29:38 galaxy kernel: [  496.852438]  [<ffffffff815f38e0>] ? 
gs_change+0x13/0x13

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-13-generic 3.0.0-13.22
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
Uname: Linux 3.0.0-13-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  marco      1816 F.... pulseaudio
CRDA: Error: [Errno 2] Arquivo ou diretório não encontrado
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe600000 irq 45'
   Mixer name   : 'Intel IbexPeak HDMI'
   Components   : 'HDA:111d7605,12972013,00100104 
HDA:80862804,80862804,00100000'
   Controls      : 18
   Simple ctrls  : 10
Date: Thu Dec 15 15:57:54 2011
HibernationDevice: RESUME=UUID=dda60741-4288-4df2-b3bc-bbe9e09f744d
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle 
(HCI mode)
MachineType: OEM B14HM21
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic 
root=UUID=d58fced6-4592-4803-98d9-62a6e595ddd9 ro quiet splash pcie_aspm=force 
i915.i915_enable_rc6=1 i915.lvds_downclock=1 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-13-generic N/A
 linux-backports-modules-3.0.0-13-generic  N/A
 linux-firmware                            1.60
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
 Dec 15 15:40:44 galaxy kernel: [ 3714.248658] show_signal_msg: 33 callbacks 
suppressed
 Dec 15 15:40:44 galaxy kernel: [ 3714.248664] compiz[1807]: segfault at 0 ip 
00007f7478d1cd49 sp 00007fff501314f0 error 4 in libunityshell.so 
(deleted)[7f747888e000+5c1000]
 Dec 15 15:42:29 galaxy kernel: [ 3819.364384] compiz[21162]: segfault at 70 ip 
00007f61381a34fb sp 00007fff12ca80b0 error 4 in libunityshell.so 
(deleted)[7f6137d6c000+5ff000]
 Dec 15 15:53:20 galaxy wpa_supplicant[1101]: WPA: Group rekeying completed 
with 00:1e:e5:49:3c:d3 [GTK=TKIP]
dmi.bios.date: 03/01/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.02.002.E3 Test Only
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B14HM21
dmi.board.vendor: OEM
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 10
dmi.chassis.vendor: OEM
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.02.002.E3TestOnly:bd03/01/2011:svnOEM:pnB14HM21:pvrTobefilledbyO.E.M.:rvnOEM:rnB14HM21:rvrTobefilledbyO.E.M.:cvnOEM:ct10:cvrToBeFilledByO.E.M.:
dmi.product.name: B14HM21
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: OEM

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric running-unity

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https://bugs.launchpad.net/bugs/904869

Title:
  BUG: scheduling while atomic

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