Comment 46 for bug 1685442

I am getting the following kernel warning with an Intel GM965/GL960 Integrated Graphics Controller:

Jan 19 22:38:43 lo45p kernel: [ 2791.152065] ------------[ cut here ]------------
Jan 19 22:38:43 lo45p kernel: [ 2791.152084] WARNING: CPU: 0 PID: 1768 at drivers/gpu/drm/drm_irq.c:1268 drm_wait_one_vblank+0x200/0x210 [drm]()
Jan 19 22:38:43 lo45p kernel: [ 2791.152087] vblank wait timed out on crtc 1
Jan 19 22:38:43 lo45p kernel: [ 2791.152089] Modules linked in: fuse arc4 i915 iwl4965 iwlegacy mac80211 btusb btrtl btbcm btintel bluetooth i2c_algo_bit cfg80211 drm_kms_helper snd_hda_codec_hdmi snd_hda_codec_realtek uvcvideo snd_hda_codec_generic drm coretemp acer_wmi snd_hda_intel sparse_keymap videobuf2_vmalloc snd_hda_codec irda videobuf2_v4l2 iTCO_wdt iTCO_vendor_support sdhci_pci sdhci videobuf2_core joydev tg3 pcspkr snd_hda_core videobuf2_memops mmc_core serio_raw v4l2_common tifm_7xx1 i2c_i801 videodev tifm_core snd_hwdep
ptp rfkill firewire_ohci ata_generic firewire_core pata_acpi syscopyarea media yenta_socket crc_itu_t sysfillrect sysimgblt wmi lpc_ich pps_core snd_pcm fb_sys_fops nfsd acpi_cpufreq video fjes shpchp crc_ccitt snd_timer snd soundcore tpm_tis tpm auth_rpcgss nfs_acl lockd grace sunrpc dm_crypt
Jan 19 22:38:43 lo45p kernel: [ 2791.152180] CPU: 0 PID: 1768 Comm: X Tainted: G W 4.4.0 #1
Jan 19 22:38:43 lo45p kernel: [ 2791.152184] Hardware name: Acer TravelMate 7720 /Tangiz , BIOS V1.35 07/03/2008
Jan 19 22:38:43 lo45p kernel: [ 2791.152187] 0000000000000000 000000001ba283c8 ffff8800b58b7890 ffffffff8145918f
Jan 19 22:38:43 lo45p kernel: [ 2791.152193] ffffffffa03de632 ffff8800b58b7910 ffffffff81098858 ffffffffa03e1270
Jan 19 22:38:43 lo45p kernel: [ 2791.152198] ffffffff00000020 ffff8800b58b7920 ffff8800b58b78c8 000000001ba283c8
Jan 19 22:38:43 lo45p kernel: [ 2791.152204] Call Trace:
Jan 19 22:38:43 lo45p kernel: [ 2791.152210] [<ffffffff8145918f>] dump_stack+0x44/0x55
Jan 19 22:38:43 lo45p kernel: [ 2791.152215] [<ffffffff81098858>] warn_slowpath_fmt+0xb8/0x140
Jan 19 22:38:43 lo45p kernel: [ 2791.152231] [<ffffffffa03a5410>] drm_wait_one_vblank+0x200/0x210 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152236] [<ffffffff810e6570>] ? wake_atomic_t_function+0x70/0x70
Jan 19 22:38:43 lo45p kernel: [ 2791.152273] [<ffffffffa077ef0b>] i9xx_crtc_disable+0x3b/0x5e0 [i915]
Jan 19 22:38:43 lo45p kernel: [ 2791.152309] [<ffffffffa0783c8e>] intel_atomic_commit+0x5ae/0x16c0 [i915]
Jan 19 22:38:43 lo45p kernel: [ 2791.152332] [<ffffffffa03c9435>] ? drm_atomic_check_only+0x185/0x580 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152355] [<ffffffffa03c8ca2>] ? drm_atomic_get_crtc_state+0x32/0xd0 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152366] [<ffffffffa0483d98>] ? __drm_atomic_helper_plane_duplicate_state+0x68/0x70 [drm_kms_helper]
Jan 19 22:38:43 lo45p kernel: [ 2791.152388] [<ffffffffa03c9867>] drm_atomic_commit+0x37/0x60 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152425] [<ffffffffa078a5ba>] intel_release_load_detect_pipe+0x12a/0x1d0 [i915]
Jan 19 22:38:43 lo45p kernel: [ 2791.152468] [<ffffffffa07d6490>] intel_tv_detect+0x320/0x6e0 [i915]
Jan 19 22:38:43 lo45p kernel: [ 2791.152476] [<ffffffffa047ae08>] drm_helper_probe_single_connector_modes_merge_bits+0x328/0x8c0 [drm_kms_helper]
Jan 19 22:38:43 lo45p kernel: [ 2791.152482] [<ffffffffa047b3b3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
Jan 19 22:38:43 lo45p kernel: [ 2791.152498] [<ffffffffa03b5d1d>] drm_mode_getconnector+0x3ad/0x430 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152509] [<ffffffffa03a3182>] drm_ioctl+0x152/0x540 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152524] [<ffffffffa03b5970>] ? drm_mode_getcrtc+0x1a0/0x1a0 [drm]
Jan 19 22:38:43 lo45p kernel: [ 2791.152528] [<ffffffff813ce38e>] ? selinux_file_ioctl+0x10e/0x3a0
Jan 19 22:38:43 lo45p kernel: [ 2791.152532] [<ffffffff81297bc8>] do_vfs_ioctl+0x298/0x4c0
Jan 19 22:38:43 lo45p kernel: [ 2791.152536] [<ffffffff813c1373>] ? security_file_ioctl+0x43/0x60
Jan 19 22:38:43 lo45p kernel: [ 2791.152539] [<ffffffff81297e69>] SyS_ioctl+0x79/0x90
Jan 19 22:38:43 lo45p kernel: [ 2791.152542] [<ffffffff81913617>] entry_SYSCALL_64_fastpath+0x12/0x6a
Jan 19 22:38:43 lo45p kernel: [ 2791.152545] ---[ end trace 15f5e94e3f9404d9 ]---