Comment 0 for bug 1432405

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