BUG: scheduling while atomic: swapper/0/0x10010000
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usb_storage binfmt_misc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_pcm ecb snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event b43 snd_seq snd_timer snd_seq_device snd mac80211 iptable_filter ip_tables soundcore cfg80211 x_tables snd_page_alloc lp dell_wmi sdhci_pci sdhci ricoh_mmc dell_laptop shpchp led_class i2c_piix4 parport k8temp dcdbas psmouse serio_raw joydev b44 usbhid video output mii ssb radeon ttm drm i2c_algo_bit ati_agp agpgart

Pid: 0, comm: swapper Not tainted (2.6.31-14-generic #48-Ubuntu) Inspiron 1501 
EIP: 0060:[<c0126fc5>] EFLAGS: 00000246 CPU: 1
EIP is at native_safe_halt+0x5/0x10
EAX: f707c000 EBX: f707df78 ECX: fffff000 EDX: 00000000
ESI: 00000001 EDI: 81d8d657 EBP: f707df3c ESP: f707df3c
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: b70af000 CR3: 31935000 CR4: 000006d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Call Trace:
 [<c010a486>] default_idle+0x46/0xd0
 [<c0168bb5>] ? clockevents_notify+0x35/0x80
 [<c010a58f>] c1e_idle+0x7f/0x100
 [<c010202c>] cpu_idle+0x8c/0xd0
 [<c056c096>] start_secondary+0xc6/0xc8