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[qiuyao <qiuyaoboy@xxxxxxxxx>]

I have just experienced this issue today.
Dell Latitude 6330
CPU: i3-3110M
GPU: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Ubuntu 14.04.2 with intel linux graphics driver 1.0.7

syslog:

Apr 12 22:37:34  kernel: [37436.202310] CPU: 0 PID: 6036 Comm: Xorg Tainted: G           OE 3.16.0-34-generic #45~14.04.1-Ubuntu
Apr 12 22:37:34  kernel: [37436.202311] Hardware name: Dell Inc. Latitude E6330/0XP1RW, BIOS A14 09/24/2014
Apr 12 22:37:34  kernel: [37436.202315]  0000000000000009 ffff8801571df9a8 ffffffff8176432f 0000000000000000
Apr 12 22:37:34  kernel: [37436.202317]  ffff8801571df9e0 ffffffff8106dd9d 0000000000000000 ffff880035d6e000
Apr 12 22:37:34  kernel: [37436.202319]  ffff8800c9d58210 ffff8801fef53000 ffff8801fef53368 ffff8801571df9f0
Apr 12 22:37:34  kernel: [37436.202320] Call Trace:
Apr 12 22:37:34  kernel: [37436.202328]  [<ffffffff8176432f>] dump_stack+0x45/0x56
Apr 12 22:37:34  kernel: [37436.202333]  [<ffffffff8106dd9d>] warn_slowpath_common+0x7d/0xa0
Apr 12 22:37:34  kernel: [37436.202336]  [<ffffffff8106de7a>] warn_slowpath_null+0x1a/0x20
Apr 12 22:37:34  kernel: [37436.202363]  [<ffffffffc05cec61>] intel_crtc_wait_for_pending_flips+0x171/0x180 [i915]
Apr 12 22:37:34  kernel: [37436.202369]  [<ffffffff810b4d70>] ? prepare_to_wait_event+0x100/0x100
Apr 12 22:37:34  kernel: [37436.202394]  [<ffffffffc05d84d9>] intel_crtc_set_config+0x959/0xdb0 [i915]
Apr 12 22:37:34  kernel: [37436.202418]  [<ffffffffc0444401>] drm_mode_set_config_internal+0x61/0xe0 [drm]
Apr 12 22:37:34  kernel: [37436.202428]  [<ffffffffc0418b33>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202437]  [<ffffffffc041a775>] drm_fb_helper_restore_fbdev_mode_unlocked+0x25/0x70 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202446]  [<ffffffffc041a7e2>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
Apr 12 22:37:34  kernel: [37436.202450]  [<ffffffff814015d1>] fb_set_var+0x191/0x430
Apr 12 22:37:34  kernel: [37436.202453]  [<ffffffff810aa740>] ? update_curr+0x80/0x180
Apr 12 22:37:34  kernel: [37436.202457]  [<ffffffff813f8611>] fbcon_blank+0x1d1/0x2d0
Apr 12 22:37:34  kernel: [37436.202461]  [<ffffffff8109ebdd>] ? ttwu_do_activate.constprop.85+0x5d/0x70
Apr 12 22:37:34  kernel: [37436.202466]  [<ffffffff81483948>] do_unblank_screen+0xb8/0x1f0
Apr 12 22:37:34  kernel: [37436.202469]  [<ffffffff814798ca>] complete_change_console+0x5a/0xe0
Apr 12 22:37:34  kernel: [37436.202471]  [<ffffffff8147a8ec>] vt_ioctl+0xf9c/0x11b0
Apr 12 22:37:34  kernel: [37436.202475]  [<ffffffff8146e13d>] tty_ioctl+0x26d/0xbb0
Apr 12 22:37:34  kernel: [37436.202478]  [<ffffffff812116e8>] ? fsnotify+0x228/0x2f0
Apr 12 22:37:34  kernel: [37436.202482]  [<ffffffff811e7090>] do_vfs_ioctl+0x2e0/0x4c0
Apr 12 22:37:34  kernel: [37436.202485]  [<ffffffff811d67c1>] ? __sb_end_write+0x31/0x60
Apr 12 22:37:34  kernel: [37436.202488]  [<ffffffff811e72f1>] SyS_ioctl+0x81/0xa0
Apr 12 22:37:34  kernel: [37436.202493]  [<ffffffff8176ca6d>] system_call_fastpath+0x1a/0x1f
Apr 12 22:37:34  kernel: [37436.202495] ---[ end trace ebc18d8b83ced03d ]---
Apr 12 22:37:34  kernel: [37436.202500] [drm:intel_pipe_set_base] *ERROR* pipe is still busy with an old pageflip

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https://bugs.launchpad.net/bugs/1384342

Title:
  kernel messages intel_crtc_wait_for_pending_flips correlate to compiz
  hang

Status in The Linux Kernel:
  Unknown
Status in System76:
  New
Status in X.org xf86-video-intel:
  Fix Released
Status in linux package in Ubuntu:
  Triaged
Status in linux package in Debian:
  Confirmed
Status in linux package in Fedora:
  Unknown
Status in linux package in openSUSE:
  Unknown

Bug description:
  I am fairly frequently (maybe once every 2 days) seeing screen
  lockups.  The system is fine, and then screen locks up. mouse is still
  movable and even changes icon based on content under it (ie mouse over
  link changes to pointing hand).  Programs are still running (often
  this occurs during a google hangout, and the hangout, audio and mic
  seem to work fine).

  Today when this happened I had more patience and hit ctrl-alt-f1, and then subsequently saw that dmesg had:
  [82218.556025] ------------[ cut here ]------------
  [82218.556074] WARNING: CPU: 0 PID: 8799 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324 intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]()
  [82218.556095] Modules linked in: xt_conntrack ipt_REJECT overlayfs pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables rfcomm bnep binfmt_misc dm_crypt uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media dm_multipath scsi_dh coretemp kvm_intel kvm arc4 joydev iwldvm mac80211 serio_raw btusb bluetooth pcmcia 6lowpan_iphc thinkpad_acpi snd_seq_midi snd_seq_midi_event nvram snd_hda_codec_conexant snd_hda_codec_generic r852 sm_common lpc_ich nand snd_rawmidi nand_ecc nand_bch snd_hda_intel bch nand_ids snd_hda_controller snd_hda_codec snd_hwdep mtd snd_seq iwlwifi r592 memstick snd_pcm
  [82218.556112]  yenta_socket pcmcia_rsrc pcmcia_core cfg80211 snd_seq_device shpchp snd_timer mei_me mei snd soundcore mac_hid parport_pc ppdev tp_smapi(OE) thinkpad_ec(OE) lp parport btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath linear hid_generic usbhid hid psmouse firewire_ohci ahci libahci firewire_core sdhci_pci sdhci crc_itu_t i915 wmi e1000e i2c_algo_bit drm_kms_helper video drm ptp pps_core pata_acpi [last unloaded: ipmi_msghandler]
  [82218.556114] CPU: 0 PID: 8799 Comm: kworker/0:1 Tainted: G        W  OE 3.16.0-23-generic #30-Ubuntu
  [82218.556115] Hardware name: LENOVO 7417CTO/7417CTO, BIOS 7UET94WW (3.24 ) 10/17/2012
  [82218.556119] Workqueue: events console_callback
  [82218.556122]  0000000000000009 ffff880016a3faf8 ffffffff8177fcbc 0000000000000000
  [82218.556123]  ffff880016a3fb30 ffffffff8106fd8d 0000000000000000 ffff880035a5a000
  [82218.556124]  ffff880035948210 ffff880035826800 ffff880035826800 ffff880016a3fb40
  [82218.556125] Call Trace:
  [82218.556130]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
  [82218.556133]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
  [82218.556135]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
  [82218.556153]  [<ffffffffc015dffc>] intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
  [82218.556156]  [<ffffffff810b9590>] ? prepare_to_wait_event+0x100/0x100
  [82218.556175]  [<ffffffffc0160ac3>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
  [82218.556177]  [<ffffffff81784e5b>] ? __ww_mutex_lock+0x1b/0xb0
  [82218.556196]  [<ffffffffc0160ca1>] i9xx_crtc_disable+0x51/0x3f0 [i915]
  [82218.556220]  [<ffffffffc0162457>] intel_crtc_update_dpms+0x67/0xa0 [i915]
  [82218.556237]  [<ffffffffc0166ac9>] intel_connector_dpms+0x59/0x70 [i915]
  [82218.556245]  [<ffffffffc00c4901>] drm_fb_helper_dpms.isra.5+0xc1/0x100 [drm_kms_helper]
  [82218.556251]  [<ffffffffc00c4971>] drm_fb_helper_blank+0x31/0x90 [drm_kms_helper]
  [82218.556254]  [<ffffffff81415d47>] fb_blank+0x57/0xc0
  [82218.556256]  [<ffffffff8140c87b>] fbcon_blank+0xfb/0x300
  [82218.556258]  [<ffffffff8108b4a2>] ? __queue_delayed_work+0x182/0x1c0
  [82218.556259]  [<ffffffff8108b7b9>] ? try_to_grab_pending+0xa9/0x160
  [82218.556262]  [<ffffffff8107cbdb>] ? lock_timer_base.isra.34+0x2b/0x50
  [82218.556264]  [<ffffffff8107dd1f>] ? try_to_del_timer_sync+0x4f/0x70
  [82218.556266]  [<ffffffff81497ba3>] do_blank_screen+0x1d3/0x280
  [82218.556267]  [<ffffffff8149a348>] console_callback+0x68/0x160
  [82218.556269]  [<ffffffff8108d8e2>] process_one_work+0x182/0x4e0
  [82218.556270]  [<ffffffff8108dcab>] worker_thread+0x6b/0x6a0
  [82218.556272]  [<ffffffff8178294d>] ? __schedule+0x39d/0x890
  [82218.556273]  [<ffffffff8108dc40>] ? process_one_work+0x4e0/0x4e0
  [82218.556275]  [<ffffffff81094aeb>] kthread+0xdb/0x100
  [82218.556277]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
  [82218.556278]  [<ffffffff81787c3c>] ret_from_fork+0x7c/0xb0
  [82218.556280]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
  [82218.556281] ---[ end trace b9c751133032cf61 ]---

  /var/log/Xorg.0.log had:
  [ 83252.384] (EE) Backtrace:
  [ 83253.063] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7f80649a0666]
  [ 83253.063] (EE) 1: /usr/bin/X (0x7f80647ea000+0x1ba869) [0x7f80649a4869]
  [ 83253.063] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f806251f000+0x36da0) [0x7f8062555da0]
  [ 83253.063] (EE) 3: /usr/bin/X (0x7f80647ea000+0x1378ec) [0x7f80649218ec]
  [ 83253.063] (EE) 4: /usr/bin/X (0x7f80647ea000+0x137d0c) [0x7f8064921d0c]
  [ 83253.063] (EE) 5: /usr/bin/X (0x7f80647ea000+0x137243) [0x7f8064921243]
  [ 83253.064] (EE) 6: /usr/bin/X (0x7f80647ea000+0xe9fa8) [0x7f80648d3fa8]
  [ 83253.064] (EE) 7: /usr/bin/X (0x7f80647ea000+0x1358fc) [0x7f806491f8fc]
  [ 83253.064] (EE) 8: /usr/bin/X (0x7f80647ea000+0x5b3b7) [0x7f80648453b7]
  [ 83253.064] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f8062540ec5]
  [ 83253.064] (EE) 10: /usr/bin/X (0x7f80647ea000+0x456ae) [0x7f806482f6ae]
  [ 83253.064] (EE)
  [ 83253.115] (EE) Segmentation fault at address 0x10


  Normally, I'm generally able to switch consoles in and out of X
  without problem. I do not know if the above trace is related to X
  being locked or not.

  I'll also attach the /var/log/Xorg.0.log.old that had some information
  in it also andapparent segfault.  That said, I think all log
  information is tens of seconds after the lock up and might be a result
  of me ctrl-alt-1 <-> ctrl-alt-f7 while system was in a borked state.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-23-generic 3.16.0-23.30
  ProcVersionSignature: Ubuntu 3.16.0-23.30-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0c:   smoser     4134 F...m pulseaudio
   /dev/snd/pcmC0D0p:   smoser     4134 F...m pulseaudio
   /dev/snd/controlC0:  smoser     4134 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Oct 22 10:29:16 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-10-19 (1099 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: LENOVO 7417CTO
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic root=UUID=f9832678-e9fb-41c5-8edb-5edd5200ed0a ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-23-generic N/A
   linux-backports-modules-3.16.0-23-generic  N/A
   linux-firmware                             1.136
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2013-05-20 (520 days ago)
  dmi.bios.date: 10/17/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7UET94WW (3.24 )
  dmi.board.name: 7417CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7UET94WW(3.24):bd10/17/2012:svnLENOVO:pn7417CTO:pvrThinkPadT400:rvnLENOVO:rn7417CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 7417CTO
  dmi.product.version: ThinkPad T400
  dmi.sys.vendor: LENOVO

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