[   81.855723] lp: driver loaded but no devices found
[   81.887458] ppdev: user-space parallel port driver
[   85.828412] Bluetooth: RFCOMM TTY layer initialized
[   85.828419] Bluetooth: RFCOMM socket layer initialized
[   85.828421] Bluetooth: RFCOMM ver 1.11
[   86.459228] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   86.459232] Bluetooth: BNEP filters: protocol multicast
[   87.384997] sky2 0000:02:00.0: eth0: enabling interface
[   87.386958] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   89.068347] sky2 0000:02:00.0: eth0: Link is up at 100 Mbps, full duplex, flow control both
[   89.068884] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   94.428125] init: plymouth-stop pre-start process (4159) terminated with status 1
[   99.424033] eth0: no IPv6 routers present
[16747.884272] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[16748.272078] VFS: Close: file count is 0
[16748.768099] BUG: unable to handle kernel NULL pointer dereference at           (null)
[16748.768185] IP: [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
[16748.768254] PGD 0 
[16748.768277] Oops: 0002 [#1] SMP 
[16748.768314] CPU 1 
[16748.768335] Modules linked in: hidp hid bnep rfcomm parport_pc ppdev dm_crypt lp parport snd_hda_codec_realtek snd_hda_intel joydev snd_hda_codec mmc_block snd_hwdep snd_pcm arc4 snd_seq_midi snd_rawmidi b43 snd_seq_midi_event uvcvideo tifm_sd snd_seq videodev mac80211 psmouse pcmcia snd_timer snd_seq_device tifm_7xx1 btusb bluetooth snd v4l2_compat_ioctl32 tifm_core yenta_socket cfg80211 pcmcia_rsrc soundcore mac_hid dm_multipath pcmcia_core snd_page_alloc bcma serio_raw acer_wmi sparse_keymap squashfs overlayfs nls_iso8859_1 nls_cp437 vfat fat dm_raid45 xor dm_mirror dm_region_hash dm_log btrfs zlib_deflate libcrc32c i915 wmi drm_kms_helper drm i2c_algo_bit ssb video sky2 usb_storage
[16748.769065] 
[16748.769084] Pid: 5618, comm: khidpd_04580058 Not tainted 3.2.0-14-generic #23-Ubuntu Acer, inc. Aspire 5570     /Prespa1         
[16748.769198] RIP: 0010:[<ffffffff8103cb09>]  [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
[16748.769281] RSP: 0018:ffff8800b3a75da0  EFLAGS: 00010086
[16748.769331] RAX: 0000000000010000 RBX: 0000000000000286 RCX: 0000000000000001
[16748.769395] RDX: 0000000000000000 RSI: 0000000000000286 RDI: 0000000000000000
[16748.769459] RBP: ffff8800b3a75da0 R08: ffff8800b3a74000 R09: 0000000000000001
[16748.769523] R10: 0000000000000001 R11: 0000000000000001 R12: ffff8800b3a75e80
[16748.769587] R13: ffff8800b3a75e98 R14: ffff8800b9601070 R15: ffff8800b9600000
[16748.769651] FS:  0000000000000000(0000) GS:ffff8800bf500000(0000) knlGS:0000000000000000
[16748.769725] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[16748.769778] CR2: 0000000000000000 CR3: 0000000001c05000 CR4: 00000000000006e0
[16748.769842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[16748.769906] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[16748.769971] Process khidpd_04580058 (pid: 5618, threadinfo ffff8800b3a74000, task ffff8800b4e944a0)
[16748.770051] Stack:
[16748.770071]  ffff8800b3a75db0 ffffffff8103cbb9 ffff8800b3a75dd0 ffffffff816578ee
[16748.770149]  0000000000000000 ffff8800b3a75e80 ffff8800b3a75e00 ffffffff81089ef1
[16748.770226]  ffff8800b3ffae00 0000000000000000 ffff8800b3ffae00 ffff8800b9600070
[16748.770303] Call Trace:
[16748.770332]  [<ffffffff8103cbb9>] default_spin_lock_flags+0x9/0x10
[16748.770393]  [<ffffffff816578ee>] _raw_spin_lock_irqsave+0x2e/0x40
[16748.770454]  [<ffffffff81089ef1>] finish_wait+0x41/0x80
[16748.770507]  [<ffffffffa055a146>] hidp_session+0x3e6/0x510 [hidp]
[16748.770566]  [<ffffffff810552ba>] ? finish_task_switch+0x4a/0xf0
[16748.770625]  [<ffffffff8105eac0>] ? try_to_wake_up+0x200/0x200
[16748.770680]  [<ffffffff8105eac0>] ? try_to_wake_up+0x200/0x200
[16748.770736]  [<ffffffff81089e20>] ? add_wait_queue+0x60/0x60
[16748.770792]  [<ffffffffa0559d60>] ? hidp_recv_ctrl_frame+0xf0/0xf0 [hidp]
[16748.770855]  [<ffffffff8108938c>] kthread+0x8c/0xa0
[16748.770903]  [<ffffffff81661d74>] kernel_thread_helper+0x4/0x10
[16748.770959]  [<ffffffff81089300>] ? flush_kthread_worker+0xa0/0xa0
[16748.771018]  [<ffffffff81661d70>] ? gs_change+0x13/0x13
[16748.771065] Code: 00 00 48 c7 c1 11 c9 03 81 48 c7 c2 0e c9 03 81 e9 dd fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 b8 00 00 01 00 48 89 e5 <f0> 0f c1 07 89 c2 c1 ea 10 66 39 c2 74 13 66 0f 1f 84 00 00 00 
[16748.771415] RIP  [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
[16748.771478]  RSP <ffff8800b3a75da0>
[16748.771510] CR2: 0000000000000000
[16748.835358] ---[ end trace f1f9b0ddf985a25f ]---