I've had several video lockups since running the kernel and driver that I mentioned in comment 72. I've been trying to figure out a way to get a back trace. All I've been able to come up with so far is this from the /var/log/kern.log tied to the latest lockup:
May 13 17:59:19 localhost kernel: [216520.292010] ------------[ cut here ]------------ May 13 17:59:19 localhost kernel: [216520.292037] WARNING: CPU: 1 PID: 1157 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1142 drm_wait_one_vblank+0x12f/0x180 [drm]() May 13 17:59:19 localhost kernel: [216520.292039] vblank wait timed out on crtc 0 May 13 17:59:19 localhost kernel: [216520.292041] Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c ses enclosure coretemp snd_hda_codec_analog bnep joydev snd_hda_codec_generic i915 gpio_ich kvm hid_generic dell_wmi sparse_keymap rfcomm usbhid snd_hda_intel bluetooth snd_hda_controller uas snd_hda_codec usb_storage hid snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi video snd_seq drm_kms_helper snd_seq_device dcdbas drm snd_timer serio_raw snd i2c_algo_bit soundcore shpchp lpc_ich wmi 8250_fintek mac_hid parport_pc ppdev lp parport binfmt_misc psmouse pata_acpi e1000e ptp pps_core May 13 17:59:19 localhost kernel: [216520.292093] CPU: 1 PID: 1157 Comm: Xorg Not tainted 4.0.0-997-generic #201503310205 May 13 17:59:19 localhost kernel: [216520.292095] Hardware name: Dell Inc. OptiPlex 780 /0C27VV, BIOS A15 08/06/2013 May 13 17:59:19 localhost kernel: [216520.292097] 0000000000000476 ffff8800d6c1fa08 ffffffff817e3106 0000000000000007 May 13 17:59:19 localhost kernel: [216520.292100] ffff8800d6c1fa58 ffff8800d6c1fa48 ffffffff810791b7 0000000000000286 May 13 17:59:19 localhost kernel: [216520.292103] 0000000000000000 ffff8800d6f3b800 0000000000000000 0000000000000000 May 13 17:59:19 localhost kernel: [216520.292107] Call Trace: May 13 17:59:19 localhost kernel: [216520.292114] [<ffffffff817e3106>] dump_stack+0x45/0x57 May 13 17:59:19 localhost kernel: [216520.292119] [<ffffffff810791b7>] warn_slowpath_common+0x97/0xe0 May 13 17:59:19 localhost kernel: [216520.292122] [<ffffffff810792b6>] warn_slowpath_fmt+0x46/0x50 May 13 17:59:19 localhost kernel: [216520.292127] [<ffffffff810bb267>] ? finish_wait+0x67/0x80 May 13 17:59:19 localhost kernel: [216520.292140] [<ffffffffc0371cff>] drm_wait_one_vblank+0x12f/0x180 [drm] May 13 17:59:19 localhost kernel: [216520.292144] [<ffffffff810bb130>] ? prepare_to_wait_event+0x100/0x100 May 13 17:59:19 localhost kernel: [216520.292157] [<ffffffffc0371d70>] drm_crtc_wait_one_vblank+0x20/0x30 [drm] May 13 17:59:19 localhost kernel: [216520.292167] [<ffffffffc03cd738>] drm_plane_helper_commit+0x248/0x2a0 [drm_kms_helper] May 13 17:59:19 localhost kernel: [216520.292175] [<ffffffffc03cd7ee>] drm_plane_helper_disable+0x5e/0xb0 [drm_kms_helper] May 13 17:59:19 localhost kernel: [216520.292193] [<ffffffffc037b7a8>] __setplane_internal+0x1e8/0x2e0 [drm] May 13 17:59:19 localhost kernel: [216520.292203] [<ffffffffc037b9c7>] drm_mode_cursor_universal+0x127/0x210 [drm] May 13 17:59:19 localhost kernel: [216520.292206] [<ffffffff817ed215>] ? __ww_mutex_lock+0x75/0xad May 13 17:59:19 localhost kernel: [216520.292217] [<ffffffffc037bb2f>] drm_mode_cursor_common+0x7f/0x1b0 [drm] May 13 17:59:19 localhost kernel: [216520.292220] [<ffffffff8108532b>] ? __dequeue_signal+0x6b/0xb0 May 13 17:59:19 localhost kernel: [216520.292231] [<ffffffffc037fa21>] drm_mode_cursor_ioctl+0x41/0x50 [drm] May 13 17:59:19 localhost kernel: [216520.292239] [<ffffffffc036fee6>] drm_ioctl+0x2e6/0x590 [drm] May 13 17:59:19 localhost kernel: [216520.292251] [<ffffffffc037f9e0>] ? drm_mode_setcrtc+0x5c0/0x5c0 [drm] May 13 17:59:19 localhost kernel: [216520.292254] [<ffffffff811b50a0>] ? handle_mm_fault+0xb0/0x160 May 13 17:59:19 localhost kernel: [216520.292257] [<ffffffff8120f2a5>] do_vfs_ioctl+0x75/0x320 May 13 17:59:19 localhost kernel: [216520.292261] [<ffffffff812195e5>] ? __fget_light+0x25/0x70 May 13 17:59:19 localhost kernel: [216520.292263] [<ffffffff8120f5e1>] SyS_ioctl+0x91/0xb0 May 13 17:59:19 localhost kernel: [216520.292266] [<ffffffff817ef90d>] system_call_fastpath+0x16/0x1b May 13 17:59:19 localhost kernel: [216520.292267] ---[ end trace 8b1a7f8de365434c ]--- May 13 17:59:20 localhost kernel: [216521.508014] ------------[ cut here ]------------ May 13 17:59:20 localhost kernel: [216521.508041] WARNING: CPU: 0 PID: 1157 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1142 drm_wait_one_vblank+0x12f/0x180 [drm]() May 13 17:59:20 localhost kernel: [216521.508044] vblank wait timed out on crtc 0 May 13 17:59:20 localhost kernel: [216521.508045] Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c ses enclosure coretemp snd_hda_codec_analog bnep joydev snd_hda_codec_generic i915 gpio_ich kvm hid_generic dell_wmi sparse_keymap rfcomm usbhid snd_hda_intel bluetooth snd_hda_controller uas snd_hda_codec usb_storage hid snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi video snd_seq drm_kms_helper snd_seq_device dcdbas drm snd_timer serio_raw snd i2c_algo_bit soundcore shpchp lpc_ich wmi 8250_fintek mac_hid parport_pc ppdev lp parport binfmt_misc psmouse pata_acpi e1000e ptp pps_core May 13 17:59:20 localhost kernel: [216521.508095] CPU: 0 PID: 1157 Comm: Xorg Tainted: G W 4.0.0-997-generic #201503310205 May 13 17:59:20 localhost kernel: [216521.508097] Hardware name: Dell Inc. OptiPlex 780 /0C27VV, BIOS A15 08/06/2013 May 13 17:59:20 localhost kernel: [216521.508099] 0000000000000476 ffff8800d6c1fad8 ffffffff817e3106 0000000000000007 May 13 17:59:20 localhost kernel: [216521.508103] ffff8800d6c1fb28 ffff8800d6c1fb18 ffffffff810791b7 0000000000000286 May 13 17:59:20 localhost kernel: [216521.508106] 0000000000000000 ffff8800d6f3b800 0000000000000000 0000000000000000 May 13 17:59:20 localhost kernel: [216521.508109] Call Trace: May 13 17:59:20 localhost kernel: [216521.508116] [<ffffffff817e3106>] dump_stack+0x45/0x57 May 13 17:59:20 localhost kernel: [216521.508121] [<ffffffff810791b7>] warn_slowpath_common+0x97/0xe0 May 13 17:59:20 localhost kernel: [216521.508125] [<ffffffff810792b6>] warn_slowpath_fmt+0x46/0x50 May 13 17:59:20 localhost kernel: [216521.508130] [<ffffffff810bb267>] ? finish_wait+0x67/0x80 May 13 17:59:20 localhost kernel: [216521.508143] [<ffffffffc0371cff>] drm_wait_one_vblank+0x12f/0x180 [drm] May 13 17:59:20 localhost kernel: [216521.508146] [<ffffffff810bb130>] ? prepare_to_wait_event+0x100/0x100 May 13 17:59:20 localhost kernel: [216521.508160] [<ffffffffc0371d70>] drm_crtc_wait_one_vblank+0x20/0x30 [drm] May 13 17:59:20 localhost kernel: [216521.508169] [<ffffffffc03cd738>] drm_plane_helper_commit+0x248/0x2a0 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.508177] [<ffffffffc03cd7ee>] drm_plane_helper_disable+0x5e/0xb0 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.508195] [<ffffffffc037b7a8>] __setplane_internal+0x1e8/0x2e0 [drm] May 13 17:59:20 localhost kernel: [216521.508207] [<ffffffffc038b3e7>] ? __drm_modeset_lock_all+0xb7/0x100 [drm] May 13 17:59:20 localhost kernel: [216521.508219] [<ffffffffc037f335>] drm_mode_setplane+0x175/0x260 [drm] May 13 17:59:20 localhost kernel: [216521.508227] [<ffffffffc036fee6>] drm_ioctl+0x2e6/0x590 [drm] May 13 17:59:20 localhost kernel: [216521.508238] [<ffffffffc037f1c0>] ? drm_plane_check_pixel_format+0x50/0x50 [drm] May 13 17:59:20 localhost kernel: [216521.508242] [<ffffffff8123b694>] ? fsnotify+0x204/0x260 May 13 17:59:20 localhost kernel: [216521.508245] [<ffffffff8120f2a5>] do_vfs_ioctl+0x75/0x320 May 13 17:59:20 localhost kernel: [216521.508248] [<ffffffff811fca06>] ? vfs_write+0x196/0x1f0 May 13 17:59:20 localhost kernel: [216521.508251] [<ffffffff812195e5>] ? __fget_light+0x25/0x70 May 13 17:59:20 localhost kernel: [216521.508253] [<ffffffff8120f5e1>] SyS_ioctl+0x91/0xb0 May 13 17:59:20 localhost kernel: [216521.508255] [<ffffffff811fcd14>] ? SyS_write+0x84/0xb0 May 13 17:59:20 localhost kernel: [216521.508258] [<ffffffff817ef90d>] system_call_fastpath+0x16/0x1b May 13 17:59:20 localhost kernel: [216521.508260] ---[ end trace 8b1a7f8de365434d ]--- May 13 17:59:20 localhost kernel: [216521.780014] ------------[ cut here ]------------ May 13 17:59:20 localhost kernel: [216521.780033] WARNING: CPU: 0 PID: 1157 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1142 drm_wait_one_vblank+0x12f/0x180 [drm]() May 13 17:59:20 localhost kernel: [216521.780034] vblank wait timed out on crtc 0 May 13 17:59:20 localhost kernel: [216521.780062] Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c ses enclosure coretemp snd_hda_codec_analog bnep joydev snd_hda_codec_generic i915 gpio_ich kvm hid_generic dell_wmi sparse_keymap rfcomm usbhid snd_hda_intel bluetooth snd_hda_controller uas snd_hda_codec usb_storage hid snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi video snd_seq drm_kms_helper snd_seq_device dcdbas drm snd_timer serio_raw snd i2c_algo_bit soundcore shpchp lpc_ich wmi 8250_fintek mac_hid parport_pc ppdev lp parport binfmt_misc psmouse pata_acpi e1000e ptp pps_core May 13 17:59:20 localhost kernel: [216521.780065] CPU: 0 PID: 1157 Comm: Xorg Tainted: G W 4.0.0-997-generic #201503310205 May 13 17:59:20 localhost kernel: [216521.780066] Hardware name: Dell Inc. OptiPlex 780 /0C27VV, BIOS A15 08/06/2013 May 13 17:59:20 localhost kernel: [216521.780068] 0000000000000476 ffff8800d6c1f748 ffffffff817e3106 0000000000000286 May 13 17:59:20 localhost kernel: [216521.780070] ffff8800d6c1f798 ffff8800d6c1f788 ffffffff810791b7 0000000000000286 May 13 17:59:20 localhost kernel: [216521.780072] 0000000000000000 ffff8800d6f3b800 0000000000000000 0000000000000000 May 13 17:59:20 localhost kernel: [216521.780073] Call Trace: May 13 17:59:20 localhost kernel: [216521.780077] [<ffffffff817e3106>] dump_stack+0x45/0x57 May 13 17:59:20 localhost kernel: [216521.780080] [<ffffffff810791b7>] warn_slowpath_common+0x97/0xe0 May 13 17:59:20 localhost kernel: [216521.780082] [<ffffffff810792b6>] warn_slowpath_fmt+0x46/0x50 May 13 17:59:20 localhost kernel: [216521.780086] [<ffffffff810bb267>] ? finish_wait+0x67/0x80 May 13 17:59:20 localhost kernel: [216521.780097] [<ffffffffc0371cff>] drm_wait_one_vblank+0x12f/0x180 [drm] May 13 17:59:20 localhost kernel: [216521.780100] [<ffffffff810bb130>] ? prepare_to_wait_event+0x100/0x100 May 13 17:59:20 localhost kernel: [216521.780112] [<ffffffffc0371d70>] drm_crtc_wait_one_vblank+0x20/0x30 [drm] May 13 17:59:20 localhost kernel: [216521.780120] [<ffffffffc03cd720>] drm_plane_helper_commit+0x230/0x2a0 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.780127] [<ffffffffc03cd8e7>] drm_plane_helper_update+0xa7/0x100 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.780160] [<ffffffffc06d409f>] intel_crtc_set_config+0x26f/0x4c0 [i915] May 13 17:59:20 localhost kernel: [216521.780185] [<ffffffffc06e430c>] ? intel_atomic_commit+0xcc/0x100 [i915] May 13 17:59:20 localhost kernel: [216521.780201] [<ffffffffc037b356>] drm_mode_set_config_internal+0x66/0x110 [drm] May 13 17:59:20 localhost kernel: [216521.780209] [<ffffffffc03d6648>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.780216] [<ffffffffc03d8160>] drm_fb_helper_restore_fbdev_mode_unlocked+0x30/0x80 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.780223] [<ffffffffc03d81d4>] drm_fb_helper_set_par+0x24/0x50 [drm_kms_helper] May 13 17:59:20 localhost kernel: [216521.780247] [<ffffffffc06e0a4a>] intel_fbdev_set_par+0x1a/0x60 [i915] May 13 17:59:20 localhost kernel: [216521.780250] [<ffffffff81438873>] fb_set_var+0x283/0x3a0 May 13 17:59:20 localhost kernel: [216521.780254] [<ffffffff810b2330>] ? check_preempt_wakeup+0x110/0x210 May 13 17:59:20 localhost kernel: [216521.780256] [<ffffffff8142f994>] fbcon_blank+0x1e4/0x2d0 May 13 17:59:20 localhost kernel: [216521.780261] [<ffffffff814c2290>] do_unblank_screen.part.22+0xa0/0x180 May 13 17:59:20 localhost kernel: [216521.780263] [<ffffffff814c23bc>] do_unblank_screen+0x4c/0x80 May 13 17:59:20 localhost kernel: [216521.780265] [<ffffffff814b7885>] complete_change_console+0x65/0xf0 May 13 17:59:20 localhost kernel: [216521.780267] [<ffffffff814b8a1d>] vt_ioctl+0x110d/0x1190 May 13 17:59:20 localhost kernel: [216521.780278] [<ffffffffc036fc9e>] ? drm_ioctl+0x9e/0x590 [drm] May 13 17:59:20 localhost kernel: [216521.780282] [<ffffffff814ab258>] tty_ioctl+0x418/0x980 May 13 17:59:20 localhost kernel: [216521.780284] [<ffffffff811b50a0>] ? handle_mm_fault+0xb0/0x160 May 13 17:59:20 localhost kernel: [216521.780293] [<ffffffff8120f2a5>] do_vfs_ioctl+0x75/0x320 May 13 17:59:20 localhost kernel: [216521.780295] [<ffffffff812195e5>] ? __fget_light+0x25/0x70 May 13 17:59:20 localhost kernel: [216521.780296] [<ffffffff8120f5e1>] SyS_ioctl+0x91/0xb0 May 13 17:59:20 localhost kernel: [216521.780298] [<ffffffff817ef90d>] system_call_fastpath+0x16/0x1b May 13 17:59:20 localhost kernel: [216521.780299] ---[ end trace 8b1a7f8de365434e ]--- Don't know if the above means anything or not. May someone will take a look at this and tell me whether it means anything or not or how to get a good backtrace -- 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/1402331 Title: System will periodically lockup with [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle Status in linux package in Ubuntu: Incomplete Bug description: I have noticed the lockups periodically since 09/13/2014. I can't remember what kernel version was in use then possibly kernel 3.13.0-35-generic or -36. It has continued periodically through versions -39; -40 and now to -43. The last time this has happened was today Dec 13 14:40:57 localhost kernel: [154858.820009] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle. At times when it locks up I will have a cursor on a black screen and will have to press the power button to restart other times it will lockup whenever I'm in an application such as Firefox or Evolution. At that time I can usually CTRL>ALT-F1 log in and run 'sudo reboot' to restart the system. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-43-generic 3.13.0-43.72 ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11 Uname: Linux 3.13.0-43-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chris 2445 F.... pulseaudio CurrentDesktop: GNOME Date: Sat Dec 13 20:22:51 2014 HibernationDevice: RESUME=UUID=bb329dc0-0642-4b6a-876a-12c2f02fb7f6 InstallationDate: Installed on 2014-10-24 (50 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. OptiPlex 780 ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=4254a7e9-429b-4f53-a08c-ae7ff839b98f ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-43-generic N/A linux-backports-modules-3.13.0-43-generic N/A linux-firmware 1.127.10 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/13/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A03 dmi.board.name: 0C27VV dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.asset.tag: LE0006476 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA03:bd02/13/2010:svnDellInc.:pnOptiPlex780:pvr:rvnDellInc.:rn0C27VV:rvrA01:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 780 dmi.sys.vendor: Dell Inc. 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