BUG: scheduling while atomic: swapper/0/0x10010000
Modules linked in: michael_mic arc4 ecb ppdev snd_hda_codec_idt snd_hda_codec_intelhdmi snd_hda_intel snd_hda_codec joydev snd_hwdep snd_pcm_oss iptable_filter snd_mixer_oss ip_tables snd_pcm snd_seq_dummy x_tables snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device dell_wmi lib80211_crypt_tkip snd uvcvideo wl(P) lp videodev parport soundcore v4l1_compat psmouse sdhci_pci dell_laptop lib80211 sdhci dcdbas serio_raw snd_page_alloc led_class binfmt_misc dm_raid45 xor fbcon tileblit font bitblit softcursor usbhid ohci1394 ieee1394 i915 sky2 drm i2c_algo_bit intel_agp agpgart video output

Pid: 0, comm: swapper Tainted: P           (2.6.31-13-generic #44-Ubuntu) Inspiron 1525                   
EIP: 0060:[<c03650c0>] EFLAGS: 00000286 CPU: 1
EIP is at acpi_idle_enter_bm+0x255/0x286
EAX: c0806be4 EBX: 000029a0 ECX: ffc2f606 EDX: 02040000
ESI: 00000000 EDI: f68414c0 EBP: f707df70 ESP: f707df48
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: 088668b0 CR3: 00811000 CR4: 00040690
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Call Trace:
 [<c04639e6>] cpuidle_idle_call+0x76/0xd0
 [<c010202c>] cpu_idle+0x8c/0xd0
 [<c0566d57>] start_secondary+0xc6/0xc8