BUG: scheduling while atomic: swapper/0/0x10010000
Modules linked in: binfmt_misc ppdev snd_hda_codec_idt snd_hda_codec_intelhdmi snd_hda_intel snd_hda_codec arc4 snd_hwdep ecb snd_pcm_oss snd_mixer_oss joydev snd_pcm snd_seq_dummy iwl3945 iwlcore snd_seq_oss uvcvideo snd_seq_midi snd_rawmidi snd_seq_midi_event videodev snd_seq v4l1_compat v4l2_compat_ioctl32 dell_wmi snd_timer dell_laptop sdhci_pci iptable_filter lp snd_seq_device psmouse ip_tables sdhci ricoh_mmc mac80211 snd soundcore serio_raw led_class snd_page_alloc x_tables parport cfg80211 dcdbas fbcon tileblit font bitblit softcursor usbhid ohci1394 ieee1394 sky2 i915 drm i2c_algo_bit video output intel_agp
CPU 1:
Modules linked in: binfmt_misc ppdev snd_hda_codec_idt snd_hda_codec_intelhdmi snd_hda_intel snd_hda_codec arc4 snd_hwdep ecb snd_pcm_oss snd_mixer_oss joydev snd_pcm snd_seq_dummy iwl3945 iwlcore snd_seq_oss uvcvideo snd_seq_midi snd_rawmidi snd_seq_midi_event videodev snd_seq v4l1_compat v4l2_compat_ioctl32 dell_wmi snd_timer dell_laptop sdhci_pci iptable_filter lp snd_seq_device psmouse ip_tables sdhci ricoh_mmc mac80211 snd soundcore serio_raw led_class snd_page_alloc x_tables parport cfg80211 dcdbas fbcon tileblit font bitblit softcursor usbhid ohci1394 ieee1394 sky2 i915 drm i2c_algo_bit video output intel_agp
Pid: 0, comm: swapper Not tainted 2.6.31-14-generic #48-Ubuntu Inspiron 1525                   
RIP: 0010:[<ffffffff812d7ed9>]  [<ffffffff812d7ed9>] acpi_idle_enter_bm+0x28b/0x2bf
RSP: 0018:ffff88007cb9fe98  EFLAGS: 00000283
RAX: 00000000000103f0 RBX: ffff88007cb9fee8 RCX: 0000000000000000
RDX: ffff880001a12000 RSI: 00000643437c5710 RDI: ffff880001a28240
RBP: ffffffff81012a0e R08: ffffffffff39e10c R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000014d880
R13: ffff88007cb9fe38 R14: ffffffff81082147 R15: ffff88007cb9fe08
FS:  0000000000000000(0000) GS:ffff880001a12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007fb741a93000 CR3: 0000000001001000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 [<ffffffff812d7ed2>] ? acpi_idle_enter_bm+0x284/0x2bf
 [<ffffffff813fe40b>] ? cpuidle_idle_call+0x9b/0xf0
 [<ffffffff81010e12>] ? cpu_idle+0xb2/0x100
 [<ffffffff815239f6>] ? start_secondary+0xa9/0xab