May  3 10:05:16 odo-hp5320m kernel: [  436.159099] BUG: unable to handle kernel NULL pointer dereference at 0000000000000230
May  3 10:05:16 odo-hp5320m kernel: [  436.159103] IP: [<ffffffffa02274db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.159126] PGD 1177df067 PUD 11772a067 PMD 0 
May  3 10:05:16 odo-hp5320m kernel: [  436.159131] Oops: 0000 [#1] SMP 
May  3 10:05:16 odo-hp5320m kernel: [  436.159133] last sysfs file: /sys/devices/virtual/vc/vcsa63/uevent
May  3 10:05:16 odo-hp5320m kernel: [  436.159137] CPU 2 
May  3 10:05:16 odo-hp5320m kernel: [  436.159138] Modules linked in: binfmt_misc parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_idt wl(P) rfcomm lib80211 arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi sco snd_seq_midi_event bnep snd_seq l2cap brcm80211(C) hp_wmi sparse_keymap snd_timer snd_seq_device i915 mac80211 btusb uvcvideo videodev joydev bluetooth v4l2_compat_ioctl32 drm_kms_helper drm snd psmouse serio_raw cfg80211 intel_ips soundcore i2c_algo_bit snd_page_alloc hp_accel lis3lv02d video input_polldev lp parport hid_apple usbhid hid ahci r8169 libahci
May  3 10:05:16 odo-hp5320m kernel: [  436.159172] 
May  3 10:05:16 odo-hp5320m kernel: [  436.159176] Pid: 1061, comm: Xorg Tainted: P         C  2.6.38-8-generic #42-Ubuntu Hewlett-Packard HP ProBook 5320m/149B
May  3 10:05:16 odo-hp5320m kernel: [  436.159184] RIP: 0010:[<ffffffffa02274db>]  [<ffffffffa02274db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.159196] RSP: 0018:ffff8801177cd578  EFLAGS: 00010286
May  3 10:05:16 odo-hp5320m kernel: [  436.159197] RAX: 0000000000000000 RBX: ffff8801191af000 RCX: 0000000000000000
May  3 10:05:16 odo-hp5320m kernel: [  436.159199] RDX: ffff88011a756000 RSI: 0000000000000282 RDI: ffff880125c6f000
May  3 10:05:16 odo-hp5320m kernel: [  436.159200] RBP: ffff8801177cd5c8 R08: ffff8801177cc000 R09: ffff880036f9da08
May  3 10:05:16 odo-hp5320m kernel: [  436.159201] R10: ffff8800bac901c0 R11: 0000000000000001 R12: ffff880125c6f440
May  3 10:05:16 odo-hp5320m kernel: [  436.159203] R13: 00000000b0090000 R14: ffffc900119e4000 R15: 00000000b0090000
May  3 10:05:16 odo-hp5320m kernel: [  436.159205] FS:  00007f72bbbab8a0(0000) GS:ffff8800bac80000(0000) knlGS:0000000000000000
May  3 10:05:16 odo-hp5320m kernel: [  436.159207] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
May  3 10:05:16 odo-hp5320m kernel: [  436.159208] CR2: 0000000000000230 CR3: 000000011580d000 CR4: 00000000000006e0
May  3 10:05:16 odo-hp5320m kernel: [  436.159210] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May  3 10:05:16 odo-hp5320m kernel: [  436.159211] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
May  3 10:05:16 odo-hp5320m kernel: [  436.159213] Process Xorg (pid: 1061, threadinfo ffff8801177cc000, task ffff880126f616e0)
May  3 10:05:16 odo-hp5320m kernel: [  436.159214] Stack:
May  3 10:05:16 odo-hp5320m kernel: [  436.159215]  ffff880125c6f3e8 0000000000000000 ffff880125c6f000 ffff88011a756000
May  3 10:05:16 odo-hp5320m kernel: [  436.159217]  ffff8801177cd5c8 ffff8801191af000 ffff880125c6f440 0000000000064000
May  3 10:05:16 odo-hp5320m kernel: [  436.159220]  00000000f0094004 ffff880125c6f000 ffff8801177cd618 ffffffffa0227bc2
May  3 10:05:16 odo-hp5320m kernel: [  436.159222] Call Trace:
May  3 10:05:16 odo-hp5320m kernel: [  436.159233]  [<ffffffffa0227bc2>] intel_dp_dpms+0x62/0x150 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.159238]  [<ffffffffa00ca74a>] drm_crtc_helper_set_mode+0x4ca/0x4e0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159244]  [<ffffffffa00cb47d>] drm_crtc_helper_set_config+0x84d/0xa10 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159250]  [<ffffffff812dc031>] ? idr_get_new_above+0x11/0x50
May  3 10:05:16 odo-hp5320m kernel: [  436.159254]  [<ffffffffa00c922c>] drm_fb_helper_set_par+0x7c/0xf0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159258]  [<ffffffffa00c940f>] drm_fb_helper_single_fb_probe+0x16f/0x2f0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159261]  [<ffffffffa00c9174>] drm_fb_helper_hotplug_event+0x104/0x140 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159265]  [<ffffffffa00c9277>] drm_fb_helper_set_par+0xc7/0xf0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.159270]  [<ffffffff813203c3>] fb_set_var+0x173/0x390
May  3 10:05:16 odo-hp5320m kernel: [  436.159274]  [<ffffffff812daff6>] ? cpumask_next_and+0x36/0x50
May  3 10:05:16 odo-hp5320m kernel: [  436.159279]  [<ffffffff810570b3>] ? update_curr+0x103/0x210
May  3 10:05:16 odo-hp5320m kernel: [  436.159282]  [<ffffffff8132cf63>] fbcon_blank+0x1e3/0x2e0
May  3 10:05:16 odo-hp5320m kernel: [  436.159288]  [<ffffffff81397946>] do_unblank_screen+0xb6/0x1d0
May  3 10:05:16 odo-hp5320m kernel: [  436.159290]  [<ffffffff8138d4da>] complete_change_console+0x9a/0x240
May  3 10:05:16 odo-hp5320m kernel: [  436.159293]  [<ffffffff8138f1a9>] vt_ioctl+0x1b29/0x1e10
May  3 10:05:16 odo-hp5320m kernel: [  436.159304]  [<ffffffffa00e6447>] ? drm_dropmaster_ioctl+0x97/0xa0 [drm]
May  3 10:05:16 odo-hp5320m kernel: [  436.159310]  [<ffffffffa00e0112>] ? drm_ioctl+0x172/0x4c0 [drm]
May  3 10:05:16 odo-hp5320m kernel: [  436.159315]  [<ffffffff813833eb>] tty_ioctl+0x24b/0x9f0
May  3 10:05:16 odo-hp5320m kernel: [  436.159318]  [<ffffffff8119e08d>] ? fsnotify+0x1cd/0x2e0
May  3 10:05:16 odo-hp5320m kernel: [  436.159322]  [<ffffffff8117648f>] do_vfs_ioctl+0x8f/0x360
May  3 10:05:16 odo-hp5320m kernel: [  436.159325]  [<ffffffff81164e53>] ? vfs_write+0x123/0x180
May  3 10:05:16 odo-hp5320m kernel: [  436.159327]  [<ffffffff811767f1>] sys_ioctl+0x91/0xa0
May  3 10:05:16 odo-hp5320m kernel: [  436.159330]  [<ffffffff815c402e>] ? do_device_not_available+0xe/0x10
May  3 10:05:16 odo-hp5320m kernel: [  436.159333]  [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
May  3 10:05:16 odo-hp5320m kernel: [  436.159335] Code: e5 ff ff ff bf 44 8b 73 60 45 89 ef 48 89 45 b8 0f 1f 44 00 00 48 8b 55 c8 45 89 f6 4c 03 72 18 45 89 2e 48 8b 45 b8 48 8b 7d c0 <8b> b0 30 02 00 00 e8 3a fc fe ff e9 75 fe ff ff 81 65 b8 ff bf 
May  3 10:05:16 odo-hp5320m kernel: [  436.159348] RIP  [<ffffffffa02274db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.159357]  RSP <ffff8801177cd578>
May  3 10:05:16 odo-hp5320m kernel: [  436.159358] CR2: 0000000000000230
May  3 10:05:16 odo-hp5320m kernel: [  436.159360] ---[ end trace 391f897fa319ab78 ]---
May  3 10:05:16 odo-hp5320m kernel: [  436.161424] ------------[ cut here ]------------
May  3 10:05:16 odo-hp5320m kernel: [  436.161431] WARNING: at /build/buildd/linux-2.6.38/drivers/tty/tty_mutex.c:31 tty_lock+0x4b/0x4d()
May  3 10:05:16 odo-hp5320m kernel: [  436.161432] Hardware name: HP ProBook 5320m
May  3 10:05:16 odo-hp5320m kernel: [  436.161433] Modules linked in: binfmt_misc parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_idt wl(P) rfcomm lib80211 arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi sco snd_seq_midi_event bnep snd_seq l2cap brcm80211(C) hp_wmi sparse_keymap snd_timer snd_seq_device i915 mac80211 btusb uvcvideo videodev joydev bluetooth v4l2_compat_ioctl32 drm_kms_helper drm snd psmouse serio_raw cfg80211 intel_ips soundcore i2c_algo_bit snd_page_alloc hp_accel lis3lv02d video input_polldev lp parport hid_apple usbhid hid ahci r8169 libahci
May  3 10:05:16 odo-hp5320m kernel: [  436.161457] Pid: 1061, comm: Xorg Tainted: P      D  C  2.6.38-8-generic #42-Ubuntu
May  3 10:05:16 odo-hp5320m kernel: [  436.161459] Call Trace:
May  3 10:05:16 odo-hp5320m kernel: [  436.161464]  [<ffffffff81065cef>] ? warn_slowpath_common+0x7f/0xc0
May  3 10:05:16 odo-hp5320m kernel: [  436.161466]  [<ffffffff81065d4a>] ? warn_slowpath_null+0x1a/0x20
May  3 10:05:16 odo-hp5320m kernel: [  436.161468]  [<ffffffff815c30eb>] ? tty_lock+0x4b/0x4d
May  3 10:05:16 odo-hp5320m kernel: [  436.161471]  [<ffffffff8138251d>] ? tty_release+0x8d/0x5c0
May  3 10:05:16 odo-hp5320m kernel: [  436.161475]  [<ffffffff810d8f05>] ? call_rcu_sched+0x15/0x20
May  3 10:05:16 odo-hp5320m kernel: [  436.161479]  [<ffffffff811661ae>] ? __fput+0xbe/0x200
May  3 10:05:16 odo-hp5320m kernel: [  436.161481]  [<ffffffff81166315>] ? fput+0x25/0x30
May  3 10:05:16 odo-hp5320m kernel: [  436.161483]  [<ffffffff81162bf0>] ? filp_close+0x60/0x90
May  3 10:05:16 odo-hp5320m kernel: [  436.161487]  [<ffffffff81069e38>] ? put_files_struct+0x88/0xf0
May  3 10:05:16 odo-hp5320m kernel: [  436.161489]  [<ffffffff81069f64>] ? exit_files+0x54/0x70
May  3 10:05:16 odo-hp5320m kernel: [  436.161492]  [<ffffffff8106a455>] ? do_exit+0x175/0x410
May  3 10:05:16 odo-hp5320m kernel: [  436.161495]  [<ffffffff815c418f>] ? oops_end+0xaf/0xf0
May  3 10:05:16 odo-hp5320m kernel: [  436.161502]  [<ffffffff810404ad>] ? no_context+0xfd/0x190
May  3 10:05:16 odo-hp5320m kernel: [  436.161505]  [<ffffffff81040665>] ? __bad_area_nosemaphore+0x125/0x1e0
May  3 10:05:16 odo-hp5320m kernel: [  436.161508]  [<ffffffff8104078e>] ? bad_area+0x4e/0x60
May  3 10:05:16 odo-hp5320m kernel: [  436.161512]  [<ffffffff815c6dda>] ? do_page_fault+0x53a/0x540
May  3 10:05:16 odo-hp5320m kernel: [  436.161515]  [<ffffffff81038c79>] ? default_spin_lock_flags+0x9/0x10
May  3 10:05:16 odo-hp5320m kernel: [  436.161519]  [<ffffffff815c2e6f>] ? _raw_spin_lock_irqsave+0x2f/0x40
May  3 10:05:16 odo-hp5320m kernel: [  436.161525]  [<ffffffff81074fdb>] ? lock_timer_base.clone.20+0x3b/0x70
May  3 10:05:16 odo-hp5320m kernel: [  436.161529]  [<ffffffff81076185>] ? try_to_del_timer_sync+0x85/0xe0
May  3 10:05:16 odo-hp5320m kernel: [  436.161532]  [<ffffffff8107621a>] ? del_timer_sync+0x3a/0x60
May  3 10:05:16 odo-hp5320m kernel: [  436.161536]  [<ffffffff815c34d5>] ? page_fault+0x25/0x30
May  3 10:05:16 odo-hp5320m kernel: [  436.161550]  [<ffffffffa02274db>] ? intel_dp_link_down+0x32b/0x400 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.161558]  [<ffffffffa0227313>] ? intel_dp_link_down+0x163/0x400 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.161567]  [<ffffffffa0227bc2>] ? intel_dp_dpms+0x62/0x150 [i915]
May  3 10:05:16 odo-hp5320m kernel: [  436.161572]  [<ffffffffa00ca74a>] ? drm_crtc_helper_set_mode+0x4ca/0x4e0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161577]  [<ffffffffa00cb47d>] ? drm_crtc_helper_set_config+0x84d/0xa10 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161581]  [<ffffffff812dc031>] ? idr_get_new_above+0x11/0x50
May  3 10:05:16 odo-hp5320m kernel: [  436.161585]  [<ffffffffa00c922c>] ? drm_fb_helper_set_par+0x7c/0xf0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161589]  [<ffffffffa00c940f>] ? drm_fb_helper_single_fb_probe+0x16f/0x2f0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161592]  [<ffffffffa00c9174>] ? drm_fb_helper_hotplug_event+0x104/0x140 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161596]  [<ffffffffa00c9277>] ? drm_fb_helper_set_par+0xc7/0xf0 [drm_kms_helper]
May  3 10:05:16 odo-hp5320m kernel: [  436.161599]  [<ffffffff813203c3>] ? fb_set_var+0x173/0x390
May  3 10:05:16 odo-hp5320m kernel: [  436.161602]  [<ffffffff812daff6>] ? cpumask_next_and+0x36/0x50
May  3 10:05:16 odo-hp5320m kernel: [  436.161605]  [<ffffffff810570b3>] ? update_curr+0x103/0x210
May  3 10:05:16 odo-hp5320m kernel: [  436.161607]  [<ffffffff8132cf63>] ? fbcon_blank+0x1e3/0x2e0
May  3 10:05:16 odo-hp5320m kernel: [  436.161613]  [<ffffffff81397946>] ? do_unblank_screen+0xb6/0x1d0
May  3 10:05:16 odo-hp5320m kernel: [  436.161615]  [<ffffffff8138d4da>] ? complete_change_console+0x9a/0x240
May  3 10:05:16 odo-hp5320m kernel: [  436.161617]  [<ffffffff8138f1a9>] ? vt_ioctl+0x1b29/0x1e10
May  3 10:05:16 odo-hp5320m kernel: [  436.161625]  [<ffffffffa00e6447>] ? drm_dropmaster_ioctl+0x97/0xa0 [drm]
May  3 10:05:16 odo-hp5320m kernel: [  436.161630]  [<ffffffffa00e0112>] ? drm_ioctl+0x172/0x4c0 [drm]
May  3 10:05:16 odo-hp5320m kernel: [  436.161633]  [<ffffffff813833eb>] ? tty_ioctl+0x24b/0x9f0
May  3 10:05:16 odo-hp5320m kernel: [  436.161636]  [<ffffffff8119e08d>] ? fsnotify+0x1cd/0x2e0
May  3 10:05:16 odo-hp5320m kernel: [  436.161639]  [<ffffffff8117648f>] ? do_vfs_ioctl+0x8f/0x360
May  3 10:05:16 odo-hp5320m kernel: [  436.161641]  [<ffffffff81164e53>] ? vfs_write+0x123/0x180
May  3 10:05:16 odo-hp5320m kernel: [  436.161643]  [<ffffffff811767f1>] ? sys_ioctl+0x91/0xa0
May  3 10:05:16 odo-hp5320m kernel: [  436.161645]  [<ffffffff815c402e>] ? do_device_not_available+0xe/0x10
May  3 10:05:16 odo-hp5320m kernel: [  436.161648]  [<ffffffff8100c002>] ? system_call_fastpath+0x16/0x1b
May  3 10:05:16 odo-hp5320m kernel: [  436.161649] ---[ end trace 391f897fa319ab79 ]---

(... hard reboot... etc. )

May  3 14:43:44 odo-hp5320m kernel: [   70.673206] BUG: unable to handle kernel NULL pointer dereference at 0000000000000230
May  3 14:43:44 odo-hp5320m kernel: [   70.673283] IP: [<ffffffffa00f34db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 14:43:44 odo-hp5320m kernel: [   70.673333] PGD 11d890067 PUD 1198d5067 PMD 0 
May  3 14:43:44 odo-hp5320m kernel: [   70.673366] Oops: 0000 [#1] SMP 
May  3 14:43:44 odo-hp5320m kernel: [   70.673393] last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/status
May  3 14:43:44 odo-hp5320m kernel: [   70.673477] CPU 3 
May  3 14:43:44 odo-hp5320m kernel: [   70.673494] Modules linked in: binfmt_misc parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_idt wl(P) snd_hda_intel lib80211 snd_hda_codec snd_hwdep rfcomm arc4 snd_pcm snd_seq_midi hid_apple snd_rawmidi sco snd_seq_midi_event snd_seq bnep hp_wmi brcm80211(C) snd_timer joydev snd_seq_device l2cap mac80211 uvcvideo usbhid hid btusb sparse_keymap i915 bluetooth cfg80211 snd hp_accel videodev v4l2_compat_ioctl32 intel_ips lis3lv02d psmouse serio_raw input_polldev drm_kms_helper soundcore snd_page_alloc drm i2c_algo_bit video lp parport ahci libahci r8169
May  3 14:43:44 odo-hp5320m kernel: [   70.673573] 
May  3 14:43:44 odo-hp5320m kernel: [   70.673577] Pid: 1110, comm: Xorg Tainted: P         C  2.6.38-8-generic #42-Ubuntu Hewlett-Packard HP ProBook 5320m/149B
May  3 14:43:44 odo-hp5320m kernel: [   70.673581] RIP: 0010:[<ffffffffa00f34db>]  [<ffffffffa00f34db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 14:43:44 odo-hp5320m kernel: [   70.673596] RSP: 0018:ffff8801198c5918  EFLAGS: 00010286
May  3 14:43:44 odo-hp5320m kernel: [   70.673599] RAX: 0000000000000000 RBX: ffff880128c4f800 RCX: 0000000000000000
May  3 14:43:44 odo-hp5320m kernel: [   70.673601] RDX: ffff88011beb0000 RSI: 0000000000000282 RDI: ffff88012c05e800
May  3 14:43:44 odo-hp5320m kernel: [   70.673604] RBP: ffff8801198c5968 R08: ffff8801198c4000 R09: 0000000000000400
May  3 14:43:44 odo-hp5320m kernel: [   70.673606] R10: 0000000000000000 R11: 0000000000000001 R12: ffff88012c05ec40
May  3 14:43:44 odo-hp5320m kernel: [   70.673609] R13: 00000000b0090000 R14: ffffc90011a64000 R15: 00000000b0090000
May  3 14:43:44 odo-hp5320m kernel: [   70.673612] FS:  00007f70a05228a0(0000) GS:ffff8800bacc0000(0000) knlGS:0000000000000000
May  3 14:43:44 odo-hp5320m kernel: [   70.673615] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May  3 14:43:44 odo-hp5320m kernel: [   70.673618] CR2: 0000000000000230 CR3: 000000011d8f5000 CR4: 00000000000006e0
May  3 14:43:44 odo-hp5320m kernel: [   70.673620] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May  3 14:43:44 odo-hp5320m kernel: [   70.673623] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
May  3 14:43:44 odo-hp5320m kernel: [   70.673626] Process Xorg (pid: 1110, threadinfo ffff8801198c4000, task ffff88011d9596e0)
May  3 14:43:44 odo-hp5320m kernel: [   70.673628] Stack:
May  3 14:43:44 odo-hp5320m kernel: [   70.673630]  ffff88012c05ebe8 0000000000000000 ffff88012c05e800 ffff88011beb0000
May  3 14:43:44 odo-hp5320m kernel: [   70.673634]  ffff8801198c5968 ffff880128c4f800 ffff88012c05ec40 0000000000064000
May  3 14:43:44 odo-hp5320m kernel: [   70.673637]  00000000f0094004 ffff88012c05e800 ffff8801198c59b8 ffffffffa00f3bc2
May  3 14:43:44 odo-hp5320m kernel: [   70.673641] Call Trace:
May  3 14:43:44 odo-hp5320m kernel: [   70.673656]  [<ffffffffa00f3bc2>] intel_dp_dpms+0x62/0x150 [i915]
May  3 14:43:44 odo-hp5320m kernel: [   70.673663]  [<ffffffffa00ad74a>] drm_crtc_helper_set_mode+0x4ca/0x4e0 [drm_kms_helper]
May  3 14:43:44 odo-hp5320m kernel: [   70.673672]  [<ffffffffa00ae47d>] drm_crtc_helper_set_config+0x84d/0xa10 [drm_kms_helper]
May  3 14:43:44 odo-hp5320m kernel: [   70.673679]  [<ffffffff812e5404>] ? snprintf+0x34/0x40
May  3 14:43:44 odo-hp5320m kernel: [   70.673696]  [<ffffffffa005c93b>] drm_mode_setcrtc+0x21b/0x450 [drm]
May  3 14:43:44 odo-hp5320m kernel: [   70.673708]  [<ffffffffa00de1e3>] ? intel_crtc_gamma_set+0x63/0x70 [i915]
May  3 14:43:44 odo-hp5320m kernel: [   70.673718]  [<ffffffffa004e384>] drm_ioctl+0x3e4/0x4c0 [drm]
May  3 14:43:44 odo-hp5320m kernel: [   70.673729]  [<ffffffffa005c720>] ? drm_mode_setcrtc+0x0/0x450 [drm]
May  3 14:43:44 odo-hp5320m kernel: [   70.673735]  [<ffffffff8117648f>] do_vfs_ioctl+0x8f/0x360
May  3 14:43:44 odo-hp5320m kernel: [   70.673739]  [<ffffffff81164fd0>] ? vfs_read+0x120/0x180
May  3 14:43:44 odo-hp5320m kernel: [   70.673743]  [<ffffffff811767f1>] sys_ioctl+0x91/0xa0
May  3 14:43:44 odo-hp5320m kernel: [   70.673747]  [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
May  3 14:43:44 odo-hp5320m kernel: [   70.673750] Code: e5 ff ff ff bf 44 8b 73 60 45 89 ef 48 89 45 b8 0f 1f 44 00 00 48 8b 55 c8 45 89 f6 4c 03 72 18 45 89 2e 48 8b 45 b8 48 8b 7d c0 <8b> b0 30 02 00 00 e8 3a fc fe ff e9 75 fe ff ff 81 65 b8 ff bf 
May  3 14:43:44 odo-hp5320m kernel: [   70.673773] RIP  [<ffffffffa00f34db>] intel_dp_link_down+0x32b/0x400 [i915]
May  3 14:43:44 odo-hp5320m kernel: [   70.673786]  RSP <ffff8801198c5918>
May  3 14:43:44 odo-hp5320m kernel: [   70.673788] CR2: 0000000000000230
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: The canary thread is apparently starving. Taking action.
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: Demoting known real-time threads.
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1619 of process 1616 (n/a).
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1618 of process 1616 (n/a).
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1616 of process 1616 (n/a).
May  3 14:43:52 odo-hp5320m rtkit-daemon[1247]: Demoted 3 threads.
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: The canary thread is apparently starving. Taking action.
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: Demoting known real-time threads.
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1619 of process 1616 (n/a).
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1618 of process 1616 (n/a).
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: Successfully demoted thread 1616 of process 1616 (n/a).
May  3 14:44:02 odo-hp5320m rtkit-daemon[1247]: Demoted 3 threads.

( etc.. until hard reboot..)