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[Oliver Leitner <1432405@xxxxxxxxxxxxxxxxxx>]

i can confirm the same problem with my hp compaq 610 laptop (rather old
laptop, not your new unknown model either)

the problem in my case links back to the i915 kernel module.

full bug output may be found here:

https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1583817

i havent gotten me the new daily kernel within the past 3 days... but
theres activity within the kernel dev lists concerning this:

https://www.spinics.net/lists/dri-devel/msg104602.html
https://patchwork.freedesktop.org/patch/87937/
http://blog.gmane.org/gmane.linux.kernel.stable/day=20160502

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https://bugs.launchpad.net/bugs/1432405

Title:
  [Toshiba Equium A100-306] WARNING: CPU: 0 PID: 968 at
  /build/buildd/linux-3.19.0/drivers/gpu/drm/drm_irq.c:1121
  drm_wait_one_vblank+0x170/0x180 [drm]()

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Triaged

Bug description:
  Noticed during boot of vivid after upgrade:

  [   54.762967] ------------[ cut here ]------------
  [   54.763009] WARNING: CPU: 1 PID: 968 at /build/buildd/linux-3.19.0/drivers/gpu/drm/drm_irq.c:1121 drm_wait_one_vblank+0x170/0x180 [drm]()
  [   54.763012] vblank not available on crtc 0, ret=-22
  [   54.763014] Modules linked in: binfmt_misc snd_hda_codec_si3054 arc4 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel iwl3945 snd_hda_controller iwlegacy snd_hda_codec mac80211 snd_hwdep pcmcia snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi yenta_socket cfg80211 coretemp pcmcia_rsrc tifm_7xx1 snd_seq pcmcia_core tifm_core joydev lpc_ich serio_raw snd_seq_device snd_timer irda snd soundcore toshiba_bluetooth toshiba_haps crc_ccitt 8250_fintek tpm_infineon shpchp mac_hid parport_pc ppdev lp parport autofs4 psmouse firewire_ohci pata_acpi e100 sdhci_pci mii i915 sdhci firewire_core i2c_algo_bit crc_itu_t drm_kms_helper drm video
  [   54.763065] CPU: 1 PID: 968 Comm: Xorg Tainted: G        W      3.19.0-9-generic #9-Ubuntu
  [   54.763068] Hardware name: TOSHIBA Equium A100/MPAD-MSAE Customer Reference Boards, BIOS 2.10    10/23/2006
  [   54.763070]  ffffffffc02e2b70 ffff8800ba62b738 ffffffff817c09b5 0000000000000007
  [   54.763075]  ffff8800ba62b788 ffff8800ba62b778 ffffffff8107595a ffff8800ba62b758
  [   54.763079]  ffff880035480000 ffff880035fb2000 0000000000000000 ffff880035480000
  [   54.763083] Call Trace:
  [   54.763094]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  [   54.763099]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  [   54.763103]  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  [   54.763118]  [<ffffffffc02b5e80>] drm_wait_one_vblank+0x170/0x180 [drm]
  [   54.763155]  [<ffffffffc03c53af>] ? gen4_read32+0x4f/0xc0 [i915]
  [   54.763186]  [<ffffffffc0417955>] intel_enable_tv+0x25/0x60 [i915]
  [   54.763212]  [<ffffffffc03e2d1b>] i9xx_crtc_enable+0x3fb/0x4c0 [i915]
  [   54.763239]  [<ffffffffc03e12b2>] __intel_set_mode+0x882/0xc80 [i915]
  [   54.763266]  [<ffffffffc03e6dfd>] intel_set_mode+0x6d/0x90 [i915]
  [   54.763293]  [<ffffffffc03e7096>] intel_get_load_detect_pipe+0x276/0x600 [i915]
  [   54.763298]  [<ffffffff811989d0>] ? zone_statistics+0x80/0xa0
  [   54.763328]  [<ffffffffc0418555>] intel_tv_detect+0x135/0x670 [i915]
  [   54.763342]  [<ffffffffc0322b13>] drm_helper_probe_single_connector_modes_merge_bits+0x303/0x460 [drm_kms_helper]
  [   54.763350]  [<ffffffffc0322c83>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
  [   54.763369]  [<ffffffffc02c216f>] drm_mode_getconnector+0x43f/0x4b0 [drm]
  [   54.763383]  [<ffffffffc02b3adf>] drm_ioctl+0x1df/0x680 [drm]
  [   54.763390]  [<ffffffff812077b0>] do_vfs_ioctl+0x2e0/0x4e0
  [   54.763394]  [<ffffffff811f5755>] ? __sb_end_write+0x35/0x70
  [   54.763399]  [<ffffffff811f31c2>] ? vfs_write+0x1b2/0x1f0
  [   54.763403]  [<ffffffff81207a31>] SyS_ioctl+0x81/0xa0
  [   54.763407]  [<ffffffff817c7aed>] system_call_fastpath+0x16/0x1b
  [   54.763410] ---[ end trace 959064f9168f0b5b ]---

  repeats quite a few times during the boot.
  (3.19.0-9-generic #9-Ubuntu)
  Oldish Core2 laptop, internal LCD only running KDE.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic 3.19.0.9.8
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  Uname: Linux 3.19.0-9-generic x86_64
  ApportVersion: 2.16.2-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dg         2008 F.... pulseaudio
  Date: Sun Mar 15 17:49:05 2015
  HibernationDevice: RESUME=/dev/mapper/davros--vg-swap_1
  InstallationDate: Installed on 2013-11-15 (485 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131115)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: TOSHIBA Equium A100
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-9-generic root=/dev/mapper/hostname--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-9-generic N/A
   linux-backports-modules-3.19.0-9-generic  N/A
   linux-firmware                            1.143
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: yes
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-03-15 (0 days ago)
  dmi.bios.date: 10/23/2006
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 2.10
  dmi.board.name: MPAD-MSAE Customer Reference Boards
  dmi.board.vendor: Intel Corporation
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr2.10:bd10/23/2006:svnTOSHIBA:pnEquiumA100:pvrPSAABE-00J008EN:rvnIntelCorporation:rnMPAD-MSAECustomerReferenceBoards:rvrNotApplicable:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: Equium A100
  dmi.product.version: PSAABE-00J008EN
  dmi.sys.vendor: TOSHIBA

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