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[sputnik <ra.mz+anh@xxxxxxxxx>]

My notebook is a Tuxedo BU1504 witch is indeed an OEM of CLEVO WU550AU with Broadwall i5500 and driver i915.
Kernel is 3.19.0-18-generic #18-Ubuntu SMP Tue May 19 18:31:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux.

I can confirm the mentioned screen glitch with xubuntu + i915 happens to
me when returning from suspend or closed notebook on the internal
monitor while having attacked an external monitor while configured to
extend the screen. External monitor stays fine. When in "glitch mode" I
reconfigure from extended screen to duplicated screen, the internal
monitor gets back under control.

In the logs I see similar assertion errors as posted before:

Jun  9 15:44:54 laptop2 kernel: [60110.452461] WARNING: CPU: 1 PID: 2427 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x7b/0x90 [i915]()
Jun  9 15:44:54 laptop2 kernel: [60110.452466] plane A assertion failure (expected on, current off)
Jun  9 15:44:54 laptop2 kernel: [60110.452468] Modules linked in: usblp hid_generic usbhid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ctr ccm rfcomm bnep nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter ip_tables x_tables arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media cdc_mbim btusb cdc_wdm bluetooth option usb_wwan usbserial cdc_ncm usbnet iwlmvm mac80211 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm i915_bpo joydev intel_ips iwlwifi serio_raw snd_hda_codec_realtek snd_hda_codec_generic snd_soc_rt5640 rtsx_pci_ms cfg80211 memstick snd_hda_intel lpc_ich snd_soc_rl6231 shpchp snd_soc_core snd_hda_controller snd_hda_codec mei_me snd_compress snd_pcm_dmaengine mei snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore i2c_hid hid dw_dmac dw_dmac_core 8250_dw snd_soc_sst_acpi i2c_designware_platform spi_pxa2xx_platform i2c_designware_core acpi_pad tpm_infineon mac_hid coretemp tuxedo_wmi(OE) parport_pc ppdev lp parport autofs4 dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i2c_algo_bit psmouse drm_kms_helper r8169 mii rtsx_pci drm ahci libahci wmi video sdhci_acpi sdhci
Jun  9 15:44:54 laptop2 kernel: [60110.452600] CPU: 1 PID: 2427 Comm: Xorg Tainted: G        W  OE  3.19.0-18-generic #18-Ubuntu
Jun  9 15:44:54 laptop2 kernel: [60110.452604] Hardware name: Notebook                         W54_55_94_95_97AU,AUQ/W54_55_94_95_97AU,AUQ, BIOS 5.6.5 03/06/2015
Jun  9 15:44:54 laptop2 kernel: [60110.452606]  ffffffffc0313de8 ffff88040c12f9c8 ffffffff817c27cd 0000000000000007
Jun  9 15:44:54 laptop2 kernel: [60110.452612]  ffff88040c12fa18 ffff88040c12fa08 ffffffff8107593a ffff88040c12f9f8
Jun  9 15:44:54 laptop2 kernel: [60110.452617]  0000000000000000 ffff88040724a000 ffff88040c1ac000 ffff88040c1ac000
Jun  9 15:44:54 laptop2 kernel: [60110.452623] Call Trace:
Jun  9 15:44:54 laptop2 kernel: [60110.452636]  [<ffffffff817c27cd>] dump_stack+0x45/0x57
Jun  9 15:44:54 laptop2 kernel: [60110.452643]  [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
Jun  9 15:44:54 laptop2 kernel: [60110.452648]  [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
Jun  9 15:44:54 laptop2 kernel: [60110.452691]  [<ffffffffc02b02eb>] assert_plane.constprop.87+0x7b/0x90 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452728]  [<ffffffffc02b8561>] hsw_disable_ips+0x41/0x190 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452763]  [<ffffffffc02b8928>] intel_crtc_disable_planes+0x48/0x140 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452797]  [<ffffffffc02b968f>] haswell_crtc_disable+0x4f/0x3c0 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452830]  [<ffffffffc02ba629>] __intel_set_mode+0xa59/0xc80 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452866]  [<ffffffffc02c11fb>] intel_crtc_set_config+0xbfb/0xf70 [i915]
Jun  9 15:44:54 laptop2 kernel: [60110.452897]  [<ffffffffc0108ac6>] drm_mode_set_config_internal+0x66/0x100 [drm]
Jun  9 15:44:54 laptop2 kernel: [60110.452926]  [<ffffffffc010d113>] drm_mode_setcrtc+0x253/0x5a0 [drm]
Jun  9 15:44:54 laptop2 kernel: [60110.452948]  [<ffffffffc00fda6f>] drm_ioctl+0x1df/0x680 [drm]
Jun  9 15:44:54 laptop2 kernel: [60110.452960]  [<ffffffff81207fc0>] do_vfs_ioctl+0x2e0/0x4e0
Jun  9 15:44:54 laptop2 kernel: [60110.452965]  [<ffffffff811f5f35>] ? __sb_end_write+0x35/0x70
Jun  9 15:44:54 laptop2 kernel: [60110.452972]  [<ffffffff811f39a2>] ? vfs_write+0x1b2/0x1f0
Jun  9 15:44:54 laptop2 kernel: [60110.452977]  [<ffffffff81208241>] SyS_ioctl+0x81/0xa0
Jun  9 15:44:54 laptop2 kernel: [60110.452983]  [<ffffffff81018099>] ? SyS_iopl+0x59/0xb0
Jun  9 15:44:54 laptop2 kernel: [60110.452990]  [<ffffffff817c990d>] system_call_fastpath+0x16/0x1b
Jun  9 15:44:54 laptop2 kernel: [60110.452994] ---[ end trace b9d041d5a6d6892f ]---

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1436590

Title:
  Intel Display i915 driver crashes, Thinkpad X1 carbon Gen 3

Status in X.org xf86-video-intel:
  Confirmed
Status in xserver-xorg-video-intel package in Ubuntu:
  Triaged

Bug description:
  
  - start ubuntu 15.04 and log in
  - use CTRL+AL+F2 to switch to TTY2. (or a different TTY)
  - Watch the screen glitch: http://youtu.be/MqPi5dURZ8s
  - sometimes it's so bad it will not recover and the computer needs to be forcefully rebooted.

  I should note this is on the newst generation Thinkpad X1 Carbon (Gen
  3)

  It generates this in dmesg:

  
  [  372.015529] ------------[ cut here ]------------
  [  372.015559] WARNING: CPU: 1 PID: 936 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:1260 assert_plane.constprop.85+0x7a/0xb0 [i915]()
  [  372.015560] plane A assertion failure (expected on, current off)
  [  372.015576] Modules linked in: ctr ccm binfmt_misc rfcomm bnep nls_iso8859_1 arc4 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_intel snd_hda_controller snd_hda_codec kvm uvcvideo snd_hwdep snd_pcm videobuf2_vmalloc videobuf2_memops iwlmvm snd_seq_midi snd_seq_midi_event videobuf2_core snd_rawmidi v4l2_common mac80211 videodev media snd_seq btusb joydev iwlwifi thinkpad_acpi serio_raw bluetooth snd_seq_device cfg80211 nvram snd_timer snd soundcore mac_hid mei_me lpc_ich shpchp mei parport_pc ppdev lp parport autofs4 dm_crypt crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse i915 ahci libahci e1000e ptp i2c_algo_bit pps_core
  [  372.015578]  drm_kms_helper drm wmi video
  [  372.015580] CPU: 1 PID: 936 Comm: Xorg Tainted: G        W       4.0.0-040000rc5-generic #201503230035
  [  372.015580] Hardware name: LENOVO 20BSCTO1WW/20BSCTO1WW, BIOS N14ET25W (1.03 ) 12/01/2014
  [  372.015582]  00000000000004ec ffff8802424cb6c8 ffffffff817dfeea 000000000000363c
  [  372.015583]  ffff8802424cb718 ffff8802424cb708 ffffffff810791b7 ffff88024dc8e340
  [  372.015584]  0000000000000000 ffff88023f510000 ffff880243e54800 ffff88023f510000
  [  372.015585] Call Trace:
  [  372.015588]  [<ffffffff817dfeea>] dump_stack+0x45/0x57
  [  372.015592]  [<ffffffff810791b7>] warn_slowpath_common+0x97/0xe0
  [  372.015593]  [<ffffffff810792b6>] warn_slowpath_fmt+0x46/0x50
  [  372.015610]  [<ffffffffc022e66a>] assert_plane.constprop.85+0x7a/0xb0 [i915]
  [  372.015624]  [<ffffffffc0239abe>] hsw_disable_ips+0x5e/0x1b0 [i915]
  [  372.015637]  [<ffffffffc0239e58>] intel_crtc_disable_planes+0x48/0x150 [i915]
  [  372.015649]  [<ffffffffc023a495>] haswell_crtc_disable+0x55/0x2d0 [i915]
  [  372.015660]  [<ffffffffc023ac18>] __intel_set_mode+0x1b8/0x3e0 [i915]
  [  372.015676]  [<ffffffffc023e778>] intel_crtc_set_config+0x408/0x4f0 [i915]
  [  372.015689]  [<ffffffffc00d4427>] ? drm_atomic_state_free+0x27/0x50 [drm]
  [  372.015706]  [<ffffffffc024ed3c>] ? intel_atomic_commit+0xcc/0x100 [i915]
  [  372.015713]  [<ffffffffc013495d>] ? drm_atomic_helper_plane_set_property+0x8d/0xc0 [drm_kms_helper]
  [  372.015722]  [<ffffffffc00c41e6>] drm_mode_set_config_internal+0x66/0x110 [drm]
  [  372.015729]  [<ffffffffc0137648>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
  [  372.015735]  [<ffffffffc0139160>] drm_fb_helper_restore_fbdev_mode_unlocked+0x30/0x80 [drm_kms_helper]
  [  372.015740]  [<ffffffffc01391d4>] drm_fb_helper_set_par+0x24/0x50 [drm_kms_helper]
  [  372.015756]  [<ffffffffc024b44a>] intel_fbdev_set_par+0x1a/0x60 [i915]
  [  372.015759]  [<ffffffff81436893>] fb_set_var+0x283/0x3a0
  [  372.015761]  [<ffffffff810b10d1>] ? update_curr+0x141/0x1f0
  [  372.015763]  [<ffffffff8142d9b4>] fbcon_blank+0x1e4/0x2d0
  [  372.015766]  [<ffffffff814c0230>] do_unblank_screen.part.22+0xa0/0x180
  [  372.015768]  [<ffffffff814c035c>] do_unblank_screen+0x4c/0x80
  [  372.015770]  [<ffffffff814b5825>] complete_change_console+0x65/0xf0
  [  372.015772]  [<ffffffff814b69bd>] vt_ioctl+0x110d/0x1190
  [  372.015779]  [<ffffffffc00b8c9e>] ? drm_ioctl+0x9e/0x590 [drm]
  [  372.015783]  [<ffffffff814a91f8>] tty_ioctl+0x418/0x980
  [  372.015785]  [<ffffffff8123a504>] ? fsnotify+0x204/0x260
  [  372.015787]  [<ffffffff8120e115>] do_vfs_ioctl+0x75/0x320
  [  372.015789]  [<ffffffff811fb876>] ? vfs_write+0x196/0x1f0
  [  372.015791]  [<ffffffff81218455>] ? __fget_light+0x25/0x70
  [  372.015793]  [<ffffffff8120e451>] SyS_ioctl+0x91/0xb0
  [  372.015795]  [<ffffffff817ec6cd>] system_call_fastpath+0x16/0x1b
  [  372.015796] ---[ end trace e72efca01d0fd8ae ]---
  [  377.884971] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg 1:7.7+7ubuntu4
  Uname: Linux 4.0.0-040000rc5-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Mar 25 17:45:39 2015
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:2227]
  InstallationDate: Installed on 2015-03-23 (2 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150323)
  MachineType: LENOVO 20BSCTO1WW
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.0.0-040000rc5-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N14ET25W (1.03 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BSCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50512 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN14ET25W(1.03):bd12/01/2014:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BSCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 3rd
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.1+15.04.20150303-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.59-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.0-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.0-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Wed Mar 25 17:38:55 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1049 
   vendor                                     LGD
  xserver.version: 2:1.17.1-0ubuntu3

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