I believe I am experiencing this bug too. Dell Studio 1569.
Found this in my syslog.log:

Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142243] BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:3:566]
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142250] Modules linked in: snd_seq_dummy joydev snd_hda_codec_hdmi snd_hda_codec_realtek parport_pc ppdev rfcomm bnep btusb bluetooth binfmt_misc arc4 dell_wmi sparse_keymap dell_laptop dcdbas 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 iwlwifi i915 mac80211 drm_kms_helper wmi uvcvideo psmouse videodev v4l2_compat_ioctl32 cfg80211 mac_hid intel_ips snd serio_raw drm mei(C) soundcore i2c_algo_bit video snd_page_alloc lp parport usbhid hid r8169
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142316] CPU 0 
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142318] Modules linked in: snd_seq_dummy joydev snd_hda_codec_hdmi snd_hda_codec_realtek parport_pc ppdev rfcomm bnep btusb bluetooth binfmt_misc arc4 dell_wmi sparse_keymap dell_laptop dcdbas 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 iwlwifi i915 mac80211 drm_kms_helper wmi uvcvideo psmouse videodev v4l2_compat_ioctl32 cfg80211 mac_hid intel_ips snd serio_raw drm mei(C) soundcore i2c_algo_bit video snd_page_alloc lp parport usbhid hid r8169
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142369] 
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142373] Pid: 566, comm: kworker/0:3 Tainted: G         C   3.2.0-24-generic #39-Ubuntu Dell Inc. Studio 1569/0R225F
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142381] RIP: 0010:[<ffffffffa00c9d73>]  [<ffffffffa00c9d73>] mei_timer+0xc3/0x260 [mei]
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142394] RSP: 0018:ffff880115149de0  EFLAGS: 00000283
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142398] RAX: ffff88012cef17f0 RBX: ffff880133409f00 RCX: ffff88012cef17f0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142401] RDX: 0000000000000000 RSI: ffff88012cef1270 RDI: ffff88012cef1298
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142405] RBP: ffff880115149e00 R08: 0000000000000004 R09: 0000000000000004
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142408] R10: 0000000000000004 R11: 0000000000000064 R12: 0000000000000000
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142412] R13: ffffffff81500e30 R14: ffff880115149dd0 R15: 0000000000000282
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142417] FS:  0000000000000000(0000) GS:ffff880137c00000(0000) knlGS:0000000000000000
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142421] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142424] CR2: 000000007e3e1000 CR3: 0000000001c05000 CR4: 00000000000006f0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142428] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142432] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142436] Process kworker/0:3 (pid: 566, threadinfo ffff880115148000, task ffff8801151edbc0)
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142439] Stack:
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142442]  ffff88012cef12b8 ffff88012ae0c800 ffff880137c17300 ffff880137c0e480
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142449]  ffff880115149e70 ffffffff81084f5a ffff880115149fd8 0000000000013780
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142455]  ffffffff81c0d020 ffff8801151edbc0 ffff880137c17305 00ff88012ae0c800
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142462] Call Trace:
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142473]  [<ffffffff81084f5a>] process_one_work+0x11a/0x480
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142480]  [<ffffffff81085d04>] worker_thread+0x164/0x370
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142486]  [<ffffffff81085ba0>] ? manage_workers.isra.29+0x130/0x130
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142493]  [<ffffffff8108a55c>] kthread+0x8c/0xa0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142500]  [<ffffffff81666ef4>] kernel_thread_helper+0x4/0x10
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142506]  [<ffffffff8108a4d0>] ? flush_kthread_worker+0xa0/0xa0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142511]  [<ffffffff81666ef0>] ? gs_change+0x13/0x13
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142514] Code: 02 00 00 48 39 f1 48 8b 01 75 0b eb 23 0f 1f 00 48 89 c1 48 89 d0 0f b6 51 73 84 d2 74 0a 83 ea 01 84 d2 88 51 73 74 bb 48 39 c6 <48> 8b 10 75 e0 8b 83 88 06 00 00 85 c0 74 11 83 e8 01 85 c0 89 
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142568] Call Trace:
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142573]  [<ffffffff81084f5a>] process_one_work+0x11a/0x480
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142578]  [<ffffffff81085d04>] worker_thread+0x164/0x370
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142584]  [<ffffffff81085ba0>] ? manage_workers.isra.29+0x130/0x130
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142589]  [<ffffffff8108a55c>] kthread+0x8c/0xa0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142594]  [<ffffffff81666ef4>] kernel_thread_helper+0x4/0x10
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142599]  [<ffffffff8108a4d0>] ? flush_kthread_worker+0xa0/0xa0
Jun 11 16:41:19 amu-Studio-1569 kernel: [11126.142604]  [<ffffffff81666ef0>] ? gs_change+0x13/0x13
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086774] BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:3:566]
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086778] Modules linked in: snd_seq_dummy joydev snd_hda_codec_hdmi snd_hda_codec_realtek parport_pc ppdev rfcomm bnep btusb bluetooth binfmt_misc arc4 dell_wmi sparse_keymap dell_laptop dcdbas 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 iwlwifi i915 mac80211 drm_kms_helper wmi uvcvideo psmouse videodev v4l2_compat_ioctl32 cfg80211 mac_hid intel_ips snd serio_raw drm mei(C) soundcore i2c_algo_bit video snd_page_alloc lp parport usbhid hid r8169
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086816] CPU 0 
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086817] Modules linked in: snd_seq_dummy joydev snd_hda_codec_hdmi snd_hda_codec_realtek parport_pc ppdev rfcomm bnep btusb bluetooth binfmt_misc arc4 dell_wmi sparse_keymap dell_laptop dcdbas 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 iwlwifi i915 mac80211 drm_kms_helper wmi uvcvideo psmouse videodev v4l2_compat_ioctl32 cfg80211 mac_hid intel_ips snd serio_raw drm mei(C) soundcore i2c_algo_bit video snd_page_alloc lp parport usbhid hid r8169
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086841] 
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086843] Pid: 566, comm: kworker/0:3 Tainted: G         C   3.2.0-24-generic #39-Ubuntu Dell Inc. Studio 1569/0R225F
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086847] RIP: 0010:[<ffffffffa00c9d58>]  [<ffffffffa00c9d58>] mei_timer+0xa8/0x260 [mei]
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086856] RSP: 0018:ffff880115149de0  EFLAGS: 00000283
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086857] RAX: ffff88012cef17f0 RBX: ffff880133409f00 RCX: ffff88012cef17f0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086859] RDX: ffff88012cef17f0 RSI: ffff88012cef1270 RDI: ffff88012cef1298
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086861] RBP: ffff880115149e00 R08: 0000000000000004 R09: 0000000000000004
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086862] R10: 0000000000000004 R11: 0000000000000064 R12: 0000000000000000
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086864] R13: ffffffff81500e30 R14: ffff880115149dd0 R15: 0000000000000282
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086866] FS:  0000000000000000(0000) GS:ffff880137c00000(0000) knlGS:0000000000000000
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086868] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086870] CR2: 000000007e3e1000 CR3: 0000000001c05000 CR4: 00000000000006f0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086872] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086873] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086876] Process kworker/0:3 (pid: 566, threadinfo ffff880115148000, task ffff8801151edbc0)
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086877] Stack:
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086879]  ffff88012cef12b8 ffff88012ae0c800 ffff880137c17300 ffff880137c0e480
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086882]  ffff880115149e70 ffffffff81084f5a ffff880115149fd8 0000000000013780
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086885]  ffffffff81c0d020 ffff8801151edbc0 ffff880137c17305 00ff88012ae0c800
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086888] Call Trace:
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086896]  [<ffffffff81084f5a>] process_one_work+0x11a/0x480
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086900]  [<ffffffff81085d04>] worker_thread+0x164/0x370
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086903]  [<ffffffff81085ba0>] ? manage_workers.isra.29+0x130/0x130
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086907]  [<ffffffff8108a55c>] kthread+0x8c/0xa0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086912]  [<ffffffff81666ef4>] kernel_thread_helper+0x4/0x10
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086914]  [<ffffffff8108a4d0>] ? flush_kthread_worker+0xa0/0xa0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086917]  [<ffffffff81666ef0>] ? gs_change+0x13/0x13
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086918] Code: 00 00 00 4c 89 ef e8 a8 dc ff ff eb af 66 0f 1f 44 00 00 48 8b 4b b8 49 8d b5 70 02 00 00 48 39 f1 48 8b 01 75 0b eb 23 0f 1f 00 <48> 89 c1 48 89 d0 0f b6 51 73 84 d2 74 0a 83 ea 01 84 d2 88 51 
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086944] Call Trace:
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086946]  [<ffffffff81084f5a>] process_one_work+0x11a/0x480
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086949]  [<ffffffff81085d04>] worker_thread+0x164/0x370
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086951]  [<ffffffff81085ba0>] ? manage_workers.isra.29+0x130/0x130
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086954]  [<ffffffff8108a55c>] kthread+0x8c/0xa0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086956]  [<ffffffff81666ef4>] kernel_thread_helper+0x4/0x10
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086959]  [<ffffffff8108a4d0>] ? flush_kthread_worker+0xa0/0xa0
Jun 11 16:41:47 amu-Studio-1569 kernel: [11154.086961]  [<ffffffff81666ef0>] ? gs_change+0x13/0x13
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492074] INFO: rcu_sched detected stall on CPU 0 (t=15000 jiffies)
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492095] sending NMI to all CPUs:
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492105] NMI backtrace for cpu 1
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492110] CPU 1 
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492113] Modules linked in: snd_seq_dummy joydev snd_hda_codec_hdmi snd_hda_codec_realtek parport_pc ppdev rfcomm bnep btusb bluetooth binfmt_misc arc4 dell_wmi sparse_keymap dell_laptop dcdbas 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 iwlwifi i915 mac80211 drm_kms_helper wmi uvcvideo psmouse videodev v4l2_compat_ioctl32 cfg80211 mac_hid intel_ips snd serio_raw drm mei(C) soundcore i2c_algo_bit video snd_page_alloc lp parport usbhid hid r8169
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492194] 
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492200] Pid: 0, comm: swapper/1 Tainted: G         C   3.2.0-24-generic #39-Ubuntu Dell Inc. Studio 1569/0R225F
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492209] RIP: 0010:[<ffffffff8108f811>]  [<ffffffff8108f811>] hrtimer_run_queues+0xb1/0x160
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492226] RSP: 0018:ffff880137c83e20  EFLAGS: 00000092
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492230] RAX: 0000000000000001 RBX: ffff880137c8e7c0 RCX: 0000000000000000
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492235] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880130e816f0
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492240] RBP: ffff880137c83e48 R08: 0000000000000000 R09: 0000000000000000
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492244] R10: 0000000000000ba4 R11: 0000000000000000 R12: 0000000000000000
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492249] R13: 0000000000000001 R14: ffff880137c8e7c0 R15: 7fffffffffffffff
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492255] FS:  0000000000000000(0000) GS:ffff880137c80000(0000) knlGS:0000000000000000
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492260] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jun 11 16:41:55 amu-Studio-1569 kernel: [11161.492265] CR2: 000000007e3e1000 CR3: 0000000001c05000 CR4: 0000000Jun 11 19:46:57 amu-Studio-1569 kernel: imklog 5.8.6, log source = /proc/kmsg started.