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[Oliver-pahl-b <1432405@xxxxxxxxxxxxxxxxxx>]

I experience the same issue on kernel 4.2-rc6. Before that I needed to
boot with the i915.preliminary_hw_support=1 i915.enable_ips=0 kerne
parameters, otherwise switching VTs was broken. Now switching works but
I get the vblank issue and graphical artifacts. If you need more info or
think this is a different bug, please state it so I can open another
one. Also contact me if you need more info.


[    1.546774] ------------[ cut here ]------------
[    1.546794] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_irq.c:1162 drm_wait_one_vblank+0x16e/0x1c0 [drm]()
[    1.546795] vblank not available on crtc 0, ret=-22
[    1.546844] Modules linked in: msr arc4 bnep bluetooth snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support intel_rapl iwlmvm iosf_mbi mac80211 nls_iso8859_1 intel_powerclamp coretemp kvm_intel nls_cp437 kvm vfat fat crct10dif_pclmul evdev crc32_pclmul input_leds mac_hid crc32c_intel psmouse serio_raw iwlwifi ghash_clmulni_intel aesni_intel aes_x86_64 lrw snd_hda_codec_conexant gf128mul glue_helper ablk_helper snd_hda_codec_generic cryptd i915 snd_hda_intel rtsx_pci_ms thinkpad_acpi snd_hda_codec memstick snd_hda_core nvram wmi led_class tpm_tis drm_kms_helper battery tpm cfg80211 acpi_pad drm ac snd_hwdep video mei_me rfkill intel_gtt snd_pcm i2c_algo_bit i2c_i801 snd_timer button mei snd lpc_ich soundcore i2c_core shpchp processor sch_fq_codel ip_tables x_tables ext4 crc16 mbcache jbd2 sd_mod rtsx_pci_sdmmc
[    1.546852]  mmc_core atkbd libps2 ahci libahci xhci_pci ehci_pci libata xhci_hcd ehci_hcd usbcore scsi_mod rtsx_pci usb_common i8042 serio
[    1.546854] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G     U          4.2.0-rc6-ARCH #1
[    1.546855] Hardware name: LENOVO 20DL0029GE/20DL0029GE, BIOS JEET65WW (1.14 ) 05/30/2015
[    1.546860] Workqueue: events_unbound async_run_entry_fn
[    1.546863]  0000000000000000 0000000089ad6b61 ffff8802252cb6e8 ffffffff81559be2
[    1.546865]  0000000000000000 ffff8802252cb740 ffff8802252cb728 ffffffff81073786
[    1.546867]  0000000100000000 ffff880223cab800 ffff880223cab800 0000000000000000
[    1.546867] Call Trace:
[    1.546872]  [<ffffffff81559be2>] dump_stack+0x4c/0x6e
[    1.546875]  [<ffffffff81073786>] warn_slowpath_common+0x86/0xc0
[    1.546877]  [<ffffffff81073815>] warn_slowpath_fmt+0x55/0x70
[    1.546883]  [<ffffffffa031e3fe>] drm_wait_one_vblank+0x16e/0x1c0 [drm]
[    1.546916]  [<ffffffffa054ed82>] intel_finish_crtc_commit+0x162/0x170 [i915]
[    1.546920]  [<ffffffffa04341a0>] drm_atomic_helper_commit_planes+0x170/0x200 [drm_kms_helper]
[    1.546946]  [<ffffffffa054ffad>] __intel_set_mode+0x8ad/0xb80 [i915]
[    1.546973]  [<ffffffffa0556e79>] intel_crtc_set_config+0x2c9/0x600 [i915]
[    1.546980]  [<ffffffffa03269f6>] drm_mode_set_config_internal+0x66/0x100 [drm]
[    1.546983]  [<ffffffffa0437522>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[    1.546987]  [<ffffffffa0439489>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[    1.546989]  [<ffffffffa04394f2>] drm_fb_helper_set_par+0x22/0x40 [drm_kms_helper]
[    1.547016]  [<ffffffffa05656fa>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    1.547019]  [<ffffffff8131c9e8>] fbcon_init+0x538/0x5c0
[    1.547022]  [<ffffffff81395f1e>] visual_init+0xce/0x130
[    1.547024]  [<ffffffff81397a4e>] do_bind_con_driver+0x1be/0x3e0
[    1.547027]  [<ffffffff81397fa9>] do_take_over_console+0x149/0x1a0
[    1.547029]  [<ffffffff81558d87>] ? printk+0x55/0x6b
[    1.547032]  [<ffffffff8131cac7>] do_fbcon_takeover+0x57/0xb0
[    1.547033]  [<ffffffff81320c80>] fbcon_event_notify+0x660/0x760
[    1.547036]  [<ffffffff810920fe>] notifier_call_chain+0x4e/0x80
[    1.547038]  [<ffffffff810924bb>] __blocking_notifier_call_chain+0x4b/0x70
[    1.547040]  [<ffffffff810924f6>] blocking_notifier_call_chain+0x16/0x20
[    1.547041]  [<ffffffff81326a7b>] fb_notifier_call_chain+0x1b/0x20
[    1.547043]  [<ffffffff81328c75>] register_framebuffer+0x215/0x350
[    1.547047]  [<ffffffffa043976f>] drm_fb_helper_initial_config+0x25f/0xaf0 [drm_kms_helper]
[    1.547071]  [<ffffffffa05661ab>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    1.547073]  [<ffffffff81093c3c>] async_run_entry_fn+0x4c/0x160
[    1.547076]  [<ffffffff8108b4bb>] process_one_work+0x14b/0x440
[    1.547088]  [<ffffffff8108b7f8>] worker_thread+0x48/0x4a0
[    1.547090]  [<ffffffff8108b7b0>] ? process_one_work+0x440/0x440
[    1.547092]  [<ffffffff81091458>] kthread+0xd8/0xf0
[    1.547094]  [<ffffffff81091380>] ? kthread_worker_fn+0x170/0x170
[    1.547097]  [<ffffffff8155f55f>] ret_from_fork+0x3f/0x70
[    1.547099]  [<ffffffff81091380>] ? kthread_worker_fn+0x170/0x170
[    1.547100] ---[ end trace 601e65f5cbcc5269 ]---

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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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