Public bug reported:

The machine will either freeze, hang, or crash, randomly. Syslog shows
"remove stuck pageflip" typically afterwards. Experimentation and
discussion at http://askubuntu.com/questions/838855/crashing-freezing-
hanging-on-remove-stuck-pageflip

Macbook Pro A5102
OS: Ubuntu 16.04 LTS
Memory: 7.7GiB
Processor: Intel Core i5-5257u CPU @ 2.7GHz x 4
Graphics: Intel Iris 6100 (Broadwell GT3)
Os type: 64-bit
Disk: 37.0GB
uname -a: Linux caleb-ubuntu 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 
13:48:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
uname -r: 4.4.0-43-generic

Oct 19 11:13:18 caleb-ubuntu smartd[693]: Device: /dev/sda [SAT], SMART Usage 
Attribute: 194 Temperature_Celsius changed from 54 to 55
Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576209] thunderbolt 0000:07:00.0: 
resetting error on 0:b.
Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576223] thunderbolt 0000:07:00.0: 
0:b: hotplug: scanning
Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576226] thunderbolt 0000:07:00.0: 
0:b: hotplug: no switch found

Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112344] ------------[ cut here 
]------------
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112370] WARNING: CPU: 2 PID: 1033 
at /build/linux-e0bh4_/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3963 
intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]()
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112371] 
WARN_ON(wait_event_timeout(dev_priv->pending_flip_queue, 
!intel_crtc_has_pending_flip(crtc), 60*HZ) == 0)
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112373] Modules linked in: btrfs 
xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid 
rfcomm nvram bnep btusb btrtl btbcm joydev btintel input_leds bcm5974 bluetooth 
msr binfmt_misc nls_iso8859_1 applesmc intel_rapl x86_pkg_temp_thermal 
input_polldev intel_powerclamp coretemp kvm_intel kvm irqbypass 
crct10dif_pclmul crc32_pclmul brcmfmac brcmutil snd_hda_codec_cirrus cfg80211 
snd_hda_codec_generic aesni_intel aes_x86_64 lrw snd_hda_codec_hdmi gf128mul 
glue_helper ablk_helper cryptd bdc_pci thunderbolt snd_hda_intel snd_hda_codec 
lpc_ich intel_pch_thermal shpchp mei_me snd_hda_core mei snd_hwdep snd_pcm 
snd_seq_midi snd_seq_midi_event snd_rawmidi acpi_als kfifo_buf snd_seq sbs 
industrialio sbshc snd_seq_device snd_timer spi_pxa2xx_platform apple_bl snd 
soundcore mac_hid parport_pc ppdev lp parport autofs4 hid_apple hid_generic 
usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea ahci sysfillrect uas 
libahci sysimgblt fb_sys_fops usb_storage drm fjes video
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112414] CPU: 2 PID: 1033 Comm: Xorg 
Not tainted 4.4.0-42-generic #62-Ubuntu
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112416] Hardware name: Apple Inc. 
MacBookPro12,1/Mac-E43C1C25D4880AD6, BIOS MBP121.88Z.0167.B16.1602111810 
02/11/2016
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112417]  0000000000000286 
000000004413e07b ffff88003533faa0 ffffffff813f1f83
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112419]  ffff88003533fae8 
ffffffffc020eab8 ffff88003533fad8 ffffffff81081212
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112420]  ffff880264f629a8 
ffff8800357b9030 ffff880264822000 ffff880264f62800
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112421] Call Trace:
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112426]  [<ffffffff813f1f83>] 
dump_stack+0x63/0x90
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112428]  [<ffffffff81081212>] 
warn_slowpath_common+0x82/0xc0
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112430]  [<ffffffff810812ac>] 
warn_slowpath_fmt+0x5c/0x80
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112432]  [<ffffffff810c3935>] ? 
finish_wait+0x55/0x70
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112447]  [<ffffffffc01a92a2>] 
intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112449]  [<ffffffff810c3dd0>] ? 
wake_atomic_t_function+0x60/0x60
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112461]  [<ffffffffc01aa521>] 
intel_pre_plane_update+0x111/0x140 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112473]  [<ffffffffc01aacf2>] 
intel_atomic_commit+0x352/0x6f0 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112488]  [<ffffffffc003cbde>] ? 
drm_atomic_check_only+0x18e/0x590 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112499]  [<ffffffffc003d017>] 
drm_atomic_commit+0x37/0x60 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112505]  [<ffffffffc0104939>] 
drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112514]  [<ffffffffc002c269>] 
__setplane_internal+0x169/0x250 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112524]  [<ffffffffc003b79a>] ? 
drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112533]  [<ffffffffc0030056>] 
drm_mode_setplane+0x136/0x1b0 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112540]  [<ffffffffc0021752>] 
drm_ioctl+0x152/0x540 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112549]  [<ffffffffc002ff20>] ? 
drm_plane_check_pixel_format+0x50/0x50 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112553]  [<ffffffff8122122f>] 
do_vfs_ioctl+0x29f/0x490
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112555]  [<ffffffff8120fdd1>] ? 
__sb_end_write+0x21/0x30
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112557]  [<ffffffff8120d9dd>] ? 
vfs_write+0x15d/0x1a0
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112558]  [<ffffffff81221499>] 
SyS_ioctl+0x79/0x90
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112561]  [<ffffffff818318b2>] 
entry_SYSCALL_64_fastpath+0x16/0x71
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112562] ---[ end trace 
c2690206b3e3a010 ]---
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112563] ------------[ cut here 
]------------
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112580] WARNING: CPU: 2 PID: 1033 
at /build/linux-e0bh4_/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3968 
intel_crtc_wait_for_pending_flips+0x233/0x240 [i915]()
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112581] Removing stuck page flip
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112581] Modules linked in: btrfs 
xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid 
rfcomm nvram bnep btusb btrtl btbcm joydev btintel input_leds bcm5974 bluetooth 
msr binfmt_misc nls_iso8859_1 applesmc intel_rapl x86_pkg_temp_thermal 
input_polldev intel_powerclamp coretemp kvm_intel kvm irqbypass 
crct10dif_pclmul crc32_pclmul brcmfmac brcmutil snd_hda_codec_cirrus cfg80211 
snd_hda_codec_generic aesni_intel aes_x86_64 lrw snd_hda_codec_hdmi gf128mul 
glue_helper ablk_helper cryptd bdc_pci thunderbolt snd_hda_intel snd_hda_codec 
lpc_ich intel_pch_thermal shpchp mei_me snd_hda_core mei snd_hwdep snd_pcm 
snd_seq_midi snd_seq_midi_event snd_rawmidi acpi_als kfifo_buf snd_seq sbs 
industrialio sbshc snd_seq_device snd_timer spi_pxa2xx_platform apple_bl snd 
soundcore mac_hid parport_pc ppdev lp parport autofs4 hid_apple hid_generic 
usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea ahci sysfillrect uas 
libahci sysimgblt fb_sys_fops usb_storage drm fjes video
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112610] CPU: 2 PID: 1033 Comm: Xorg 
Tainted: G        W       4.4.0-42-generic #62-Ubuntu
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112610] Hardware name: Apple Inc. 
MacBookPro12,1/Mac-E43C1C25D4880AD6, BIOS MBP121.88Z.0167.B16.1602111810 
02/11/2016
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112611]  0000000000000086 
000000004413e07b ffff88003533faa0 ffffffff813f1f83
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112613]  ffff88003533fae8 
ffffffffc020eab8 ffff88003533fad8 ffffffff81081212
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112614]  ffff880264f629a8 
ffff8800357b9030 ffff880264822000 ffff880264f62800
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112616] Call Trace:
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112618]  [<ffffffff813f1f83>] 
dump_stack+0x63/0x90
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112620]  [<ffffffff81081212>] 
warn_slowpath_common+0x82/0xc0
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112622]  [<ffffffff810812ac>] 
warn_slowpath_fmt+0x5c/0x80
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112624]  [<ffffffff810c3935>] ? 
finish_wait+0x55/0x70
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112639]  [<ffffffffc01a92f3>] 
intel_crtc_wait_for_pending_flips+0x233/0x240 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112641]  [<ffffffff810c3dd0>] ? 
wake_atomic_t_function+0x60/0x60
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112657]  [<ffffffffc01aa521>] 
intel_pre_plane_update+0x111/0x140 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112672]  [<ffffffffc01aacf2>] 
intel_atomic_commit+0x352/0x6f0 [i915]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112683]  [<ffffffffc003cbde>] ? 
drm_atomic_check_only+0x18e/0x590 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112694]  [<ffffffffc003d017>] 
drm_atomic_commit+0x37/0x60 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112699]  [<ffffffffc0104939>] 
drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112707]  [<ffffffffc002c269>] 
__setplane_internal+0x169/0x250 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112717]  [<ffffffffc003b79a>] ? 
drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112727]  [<ffffffffc0030056>] 
drm_mode_setplane+0x136/0x1b0 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112734]  [<ffffffffc0021752>] 
drm_ioctl+0x152/0x540 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112743]  [<ffffffffc002ff20>] ? 
drm_plane_check_pixel_format+0x50/0x50 [drm]
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112745]  [<ffffffff8122122f>] 
do_vfs_ioctl+0x29f/0x490
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112746]  [<ffffffff8120fdd1>] ? 
__sb_end_write+0x21/0x30
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112748]  [<ffffffff8120d9dd>] ? 
vfs_write+0x15d/0x1a0
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112749]  [<ffffffff81221499>] 
SyS_ioctl+0x79/0x90
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112751]  [<ffffffff818318b2>] 
entry_SYSCALL_64_fastpath+0x16/0x71
Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112752] ---[ end trace 
c2690206b3e3a011 ]---
[drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable 
link training
Oct 19 11:15:56 caleb-ubuntu kernel: [ 1961.138660] 
[drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to 
start channel equalization

Oct 19 11:16:04 caleb-ubuntu kernel: [ 1969.019894] thunderbolt 0000:07:00.0: 
resetting error on 0:b.
Oct 19 11:16:04 caleb-ubuntu kernel: [ 1969.019905] thunderbolt 0000:07:00.0: 
0:b: got unplug event for disconnected port, ignoring

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-43-generic 4.4.0-43.63
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  caleb      1780 F.... pulseaudio
 /dev/snd/pcmC1D0p:   caleb      1780 F...m pulseaudio
 /dev/snd/controlC1:  caleb      1780 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Oct 24 16:22:35 2016
HibernationDevice: RESUME=UUID=413c7830-2e21-46e2-98e7-9fb26edfd9d2
InstallationDate: Installed on 2016-10-03 (21 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: Apple Inc. MacBookPro12,1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-43-generic.efi.signed 
root=UUID=cef95b4f-a539-460f-abe0-59ebf213b3ce ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-43-generic N/A
 linux-backports-modules-4.4.0-43-generic  N/A
 linux-firmware                            1.157.4
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/11/2016
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP121.88Z.0167.B16.1602111810
dmi.board.name: Mac-E43C1C25D4880AD6
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro12,1
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-E43C1C25D4880AD6
dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP121.88Z.0167.B16.1602111810:bd02/11/2016:svnAppleInc.:pnMacBookPro12,1:pvr1.0:rvnAppleInc.:rnMac-E43C1C25D4880AD6:rvrMacBookPro12,1:cvnAppleInc.:ct9:cvrMac-E43C1C25D4880AD6:
dmi.product.name: MacBookPro12,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1636327

Title:
  Crashing, freezing, hanging on “Remove Stuck Pageflip”

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The machine will either freeze, hang, or crash, randomly. Syslog shows
  "remove stuck pageflip" typically afterwards. Experimentation and
  discussion at http://askubuntu.com/questions/838855/crashing-freezing-
  hanging-on-remove-stuck-pageflip

  Macbook Pro A5102
  OS: Ubuntu 16.04 LTS
  Memory: 7.7GiB
  Processor: Intel Core i5-5257u CPU @ 2.7GHz x 4
  Graphics: Intel Iris 6100 (Broadwell GT3)
  Os type: 64-bit
  Disk: 37.0GB
  uname -a: Linux caleb-ubuntu 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 
13:48:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
  uname -r: 4.4.0-43-generic

  Oct 19 11:13:18 caleb-ubuntu smartd[693]: Device: /dev/sda [SAT], SMART Usage 
Attribute: 194 Temperature_Celsius changed from 54 to 55
  Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576209] thunderbolt 0000:07:00.0: 
resetting error on 0:b.
  Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576223] thunderbolt 0000:07:00.0: 
0:b: hotplug: scanning
  Oct 19 11:15:23 caleb-ubuntu kernel: [ 1928.576226] thunderbolt 0000:07:00.0: 
0:b: hotplug: no switch found

  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112344] ------------[ cut here 
]------------
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112370] WARNING: CPU: 2 PID: 1033 
at /build/linux-e0bh4_/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3963 
intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]()
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112371] 
WARN_ON(wait_event_timeout(dev_priv->pending_flip_queue, 
!intel_crtc_has_pending_flip(crtc), 60*HZ) == 0)
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112373] Modules linked in: btrfs 
xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid 
rfcomm nvram bnep btusb btrtl btbcm joydev btintel input_leds bcm5974 bluetooth 
msr binfmt_misc nls_iso8859_1 applesmc intel_rapl x86_pkg_temp_thermal 
input_polldev intel_powerclamp coretemp kvm_intel kvm irqbypass 
crct10dif_pclmul crc32_pclmul brcmfmac brcmutil snd_hda_codec_cirrus cfg80211 
snd_hda_codec_generic aesni_intel aes_x86_64 lrw snd_hda_codec_hdmi gf128mul 
glue_helper ablk_helper cryptd bdc_pci thunderbolt snd_hda_intel snd_hda_codec 
lpc_ich intel_pch_thermal shpchp mei_me snd_hda_core mei snd_hwdep snd_pcm 
snd_seq_midi snd_seq_midi_event snd_rawmidi acpi_als kfifo_buf snd_seq sbs 
industrialio sbshc snd_seq_device snd_timer spi_pxa2xx_platform apple_bl snd 
soundcore mac_hid parport_pc ppdev lp parport autofs4 hid_apple hid_generic 
usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea ahci sysfillrect uas 
libahci sysimgblt fb_sys_fops usb_storage drm fjes video
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112414] CPU: 2 PID: 1033 Comm: 
Xorg Not tainted 4.4.0-42-generic #62-Ubuntu
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112416] Hardware name: Apple Inc. 
MacBookPro12,1/Mac-E43C1C25D4880AD6, BIOS MBP121.88Z.0167.B16.1602111810 
02/11/2016
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112417]  0000000000000286 
000000004413e07b ffff88003533faa0 ffffffff813f1f83
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112419]  ffff88003533fae8 
ffffffffc020eab8 ffff88003533fad8 ffffffff81081212
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112420]  ffff880264f629a8 
ffff8800357b9030 ffff880264822000 ffff880264f62800
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112421] Call Trace:
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112426]  [<ffffffff813f1f83>] 
dump_stack+0x63/0x90
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112428]  [<ffffffff81081212>] 
warn_slowpath_common+0x82/0xc0
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112430]  [<ffffffff810812ac>] 
warn_slowpath_fmt+0x5c/0x80
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112432]  [<ffffffff810c3935>] ? 
finish_wait+0x55/0x70
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112447]  [<ffffffffc01a92a2>] 
intel_crtc_wait_for_pending_flips+0x1e2/0x240 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112449]  [<ffffffff810c3dd0>] ? 
wake_atomic_t_function+0x60/0x60
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112461]  [<ffffffffc01aa521>] 
intel_pre_plane_update+0x111/0x140 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112473]  [<ffffffffc01aacf2>] 
intel_atomic_commit+0x352/0x6f0 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112488]  [<ffffffffc003cbde>] ? 
drm_atomic_check_only+0x18e/0x590 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112499]  [<ffffffffc003d017>] 
drm_atomic_commit+0x37/0x60 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112505]  [<ffffffffc0104939>] 
drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112514]  [<ffffffffc002c269>] 
__setplane_internal+0x169/0x250 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112524]  [<ffffffffc003b79a>] ? 
drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112533]  [<ffffffffc0030056>] 
drm_mode_setplane+0x136/0x1b0 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112540]  [<ffffffffc0021752>] 
drm_ioctl+0x152/0x540 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112549]  [<ffffffffc002ff20>] ? 
drm_plane_check_pixel_format+0x50/0x50 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112553]  [<ffffffff8122122f>] 
do_vfs_ioctl+0x29f/0x490
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112555]  [<ffffffff8120fdd1>] ? 
__sb_end_write+0x21/0x30
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112557]  [<ffffffff8120d9dd>] ? 
vfs_write+0x15d/0x1a0
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112558]  [<ffffffff81221499>] 
SyS_ioctl+0x79/0x90
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112561]  [<ffffffff818318b2>] 
entry_SYSCALL_64_fastpath+0x16/0x71
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112562] ---[ end trace 
c2690206b3e3a010 ]---
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112563] ------------[ cut here 
]------------
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112580] WARNING: CPU: 2 PID: 1033 
at /build/linux-e0bh4_/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:3968 
intel_crtc_wait_for_pending_flips+0x233/0x240 [i915]()
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112581] Removing stuck page flip
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112581] Modules linked in: btrfs 
xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid 
rfcomm nvram bnep btusb btrtl btbcm joydev btintel input_leds bcm5974 bluetooth 
msr binfmt_misc nls_iso8859_1 applesmc intel_rapl x86_pkg_temp_thermal 
input_polldev intel_powerclamp coretemp kvm_intel kvm irqbypass 
crct10dif_pclmul crc32_pclmul brcmfmac brcmutil snd_hda_codec_cirrus cfg80211 
snd_hda_codec_generic aesni_intel aes_x86_64 lrw snd_hda_codec_hdmi gf128mul 
glue_helper ablk_helper cryptd bdc_pci thunderbolt snd_hda_intel snd_hda_codec 
lpc_ich intel_pch_thermal shpchp mei_me snd_hda_core mei snd_hwdep snd_pcm 
snd_seq_midi snd_seq_midi_event snd_rawmidi acpi_als kfifo_buf snd_seq sbs 
industrialio sbshc snd_seq_device snd_timer spi_pxa2xx_platform apple_bl snd 
soundcore mac_hid parport_pc ppdev lp parport autofs4 hid_apple hid_generic 
usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea ahci sysfillrect uas 
libahci sysimgblt fb_sys_fops usb_storage drm fjes video
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112610] CPU: 2 PID: 1033 Comm: 
Xorg Tainted: G        W       4.4.0-42-generic #62-Ubuntu
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112610] Hardware name: Apple Inc. 
MacBookPro12,1/Mac-E43C1C25D4880AD6, BIOS MBP121.88Z.0167.B16.1602111810 
02/11/2016
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112611]  0000000000000086 
000000004413e07b ffff88003533faa0 ffffffff813f1f83
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112613]  ffff88003533fae8 
ffffffffc020eab8 ffff88003533fad8 ffffffff81081212
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112614]  ffff880264f629a8 
ffff8800357b9030 ffff880264822000 ffff880264f62800
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112616] Call Trace:
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112618]  [<ffffffff813f1f83>] 
dump_stack+0x63/0x90
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112620]  [<ffffffff81081212>] 
warn_slowpath_common+0x82/0xc0
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112622]  [<ffffffff810812ac>] 
warn_slowpath_fmt+0x5c/0x80
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112624]  [<ffffffff810c3935>] ? 
finish_wait+0x55/0x70
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112639]  [<ffffffffc01a92f3>] 
intel_crtc_wait_for_pending_flips+0x233/0x240 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112641]  [<ffffffff810c3dd0>] ? 
wake_atomic_t_function+0x60/0x60
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112657]  [<ffffffffc01aa521>] 
intel_pre_plane_update+0x111/0x140 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112672]  [<ffffffffc01aacf2>] 
intel_atomic_commit+0x352/0x6f0 [i915]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112683]  [<ffffffffc003cbde>] ? 
drm_atomic_check_only+0x18e/0x590 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112694]  [<ffffffffc003d017>] 
drm_atomic_commit+0x37/0x60 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112699]  [<ffffffffc0104939>] 
drm_atomic_helper_disable_plane+0xa9/0xf0 [drm_kms_helper]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112707]  [<ffffffffc002c269>] 
__setplane_internal+0x169/0x250 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112717]  [<ffffffffc003b79a>] ? 
drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112727]  [<ffffffffc0030056>] 
drm_mode_setplane+0x136/0x1b0 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112734]  [<ffffffffc0021752>] 
drm_ioctl+0x152/0x540 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112743]  [<ffffffffc002ff20>] ? 
drm_plane_check_pixel_format+0x50/0x50 [drm]
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112745]  [<ffffffff8122122f>] 
do_vfs_ioctl+0x29f/0x490
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112746]  [<ffffffff8120fdd1>] ? 
__sb_end_write+0x21/0x30
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112748]  [<ffffffff8120d9dd>] ? 
vfs_write+0x15d/0x1a0
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112749]  [<ffffffff81221499>] 
SyS_ioctl+0x79/0x90
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112751]  [<ffffffff818318b2>] 
entry_SYSCALL_64_fastpath+0x16/0x71
  Oct 19 11:15:49 caleb-ubuntu kernel: [ 1954.112752] ---[ end trace 
c2690206b3e3a011 ]---
  [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable 
link training
  Oct 19 11:15:56 caleb-ubuntu kernel: [ 1961.138660] 
[drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to 
start channel equalization

  Oct 19 11:16:04 caleb-ubuntu kernel: [ 1969.019894] thunderbolt 0000:07:00.0: 
resetting error on 0:b.
  Oct 19 11:16:04 caleb-ubuntu kernel: [ 1969.019905] thunderbolt 0000:07:00.0: 
0:b: got unplug event for disconnected port, ignoring

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-43-generic 4.4.0-43.63
  ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
  Uname: Linux 4.4.0-43-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  caleb      1780 F.... pulseaudio
   /dev/snd/pcmC1D0p:   caleb      1780 F...m pulseaudio
   /dev/snd/controlC1:  caleb      1780 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Oct 24 16:22:35 2016
  HibernationDevice: RESUME=UUID=413c7830-2e21-46e2-98e7-9fb26edfd9d2
  InstallationDate: Installed on 2016-10-03 (21 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  MachineType: Apple Inc. MacBookPro12,1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-43-generic.efi.signed 
root=UUID=cef95b4f-a539-460f-abe0-59ebf213b3ce ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-43-generic N/A
   linux-backports-modules-4.4.0-43-generic  N/A
   linux-firmware                            1.157.4
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/11/2016
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP121.88Z.0167.B16.1602111810
  dmi.board.name: Mac-E43C1C25D4880AD6
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro12,1
  dmi.chassis.type: 9
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-E43C1C25D4880AD6
  dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP121.88Z.0167.B16.1602111810:bd02/11/2016:svnAppleInc.:pnMacBookPro12,1:pvr1.0:rvnAppleInc.:rnMac-E43C1C25D4880AD6:rvrMacBookPro12,1:cvnAppleInc.:ct9:cvrMac-E43C1C25D4880AD6:
  dmi.product.name: MacBookPro12,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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