[Bug 96441] [i915] vblank wait timed out on crtc

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96441

--- Comment #4 from Ryan Underwood <nemesis at icequake.net> ---
Also happening on 4.5.7-040507-generic from ubuntu with intel_drv.so 2.99.917.
The effect is strange artifacts on the screen after some suspend-to-RAM/resume
cycles.

[267338.532050] ------------[ cut here ]------------
[267338.532093] WARNING: CPU: 1 PID: 1640 at
/home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1329
drm_wait_one_vblank+0x1b5/0x1c0 [drm]()
[267338.532094] vblank wait timed out on crtc 1
[267338.532136] Modules linked in: rndis_host cdc_ether usbnet btrfs xor
raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c openafs(POE)
ctr ccm binfmt_misc arc4 snd_hda_codec_conexant snd_hda_codec_generic
snd_hda_intel ath5k snd_hda_codec snd_hda_core snd_hwdep ath mac80211 snd_pcm
snd_seq_midi snd_seq_midi_event coretemp gpio_ich snd_rawmidi snd_seq cfg80211
snd_seq_device snd_timer kvm snd hp_wmi sparse_keymap soundcore irqbypass
input_leds joydev serio_raw shpchp lpc_ich mac_hid parport_pc ppdev lp parport
autofs4 drbg ansi_cprng xts gf128mul algif_skcipher af_alg dm_crypt ums_realtek
uas usb_storage i915 psmouse ahci libahci i2c_algo_bit drm_kms_helper pata_acpi
syscopyarea sysfillrect 8139too sysimgblt fb_sys_fops 8139cp mii drm wmi fjes
video
[267338.532139] CPU: 1 PID: 1640 Comm: Xorg Tainted: P        W  OE  
4.5.7-040507-generic #201606100436
[267338.532139] Hardware name: Hewlett-Packard Compaq Presario C700 Notebook
PC/30D9, BIOS F.35 03/29/2010
[267338.532142]  0000000000000286 00000000b6fe1220 ffff8800ba2777d0
ffffffff813e1173
[267338.532144]  ffff8800ba277818 ffffffffc005dd38 ffff8800ba277808
ffffffff81080ff2
[267338.532145]  ffff880035bf7000 0000000000000001 0000000000000000
000000000c001390
[267338.532146] Call Trace:
[267338.532151]  [<ffffffff813e1173>] dump_stack+0x63/0x90
[267338.532154]  [<ffffffff81080ff2>] warn_slowpath_common+0x82/0xc0
[267338.532156]  [<ffffffff8108108c>] warn_slowpath_fmt+0x5c/0x80
[267338.532159]  [<ffffffff810c3c75>] ? finish_wait+0x55/0x70
[267338.532170]  [<ffffffffc002d3a5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm]
[267338.532171]  [<ffffffff810c4110>] ? wake_atomic_t_function+0x60/0x60
[267338.532226]  [<ffffffffc01dbc4d>] i9xx_crtc_disable+0x3d/0x460 [i915]
[267338.532248]  [<ffffffffc01d3b9c>] ? intel_crtc_disable_planes+0xdc/0xf0
[i915]
[267338.532271]  [<ffffffffc01e1521>] intel_atomic_commit+0x3c1/0xb40 [i915]
[267338.532285]  [<ffffffffc0046771>] ? drm_atomic_check_only+0x181/0x600 [drm]
[267338.532299]  [<ffffffffc0045f8f>] ?
drm_atomic_set_crtc_for_connector+0x2f/0xe0 [drm]
[267338.532313]  [<ffffffffc0046c27>] drm_atomic_commit+0x37/0x60 [drm]
[267338.532330]  [<ffffffffc00ed89f>] restore_fbdev_mode+0x22f/0x260
[drm_kms_helper]
[267338.532343]  [<ffffffffc004589a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0
[drm]
[267338.532350]  [<ffffffffc00efa83>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[267338.532356]  [<ffffffffc00efafd>] drm_fb_helper_set_par+0x2d/0x50
[drm_kms_helper]
[267338.532379]  [<ffffffffc01f70ca>] intel_fbdev_set_par+0x1a/0x60 [i915]
[267338.532381]  [<ffffffff81465396>] fb_set_var+0x236/0x470
[267338.532384]  [<ffffffff818211c3>] ? __schedule+0x2e3/0x780
[267338.532385]  [<ffffffff81821e90>] ? bit_wait+0x60/0x60
[267338.532386]  [<ffffffff81821695>] ? schedule+0x35/0x80
[267338.532389]  [<ffffffff8145b68f>] fbcon_blank+0x30f/0x350
[267338.532391]  [<ffffffff81821a54>] ? __wait_on_bit+0x74/0x90
[267338.532394]  [<ffffffff814f2ac3>] do_unblank_screen+0xd3/0x1a0
[267338.532396]  [<ffffffff814e871a>] vt_ioctl+0x50a/0x12f0
[267338.532398]  [<ffffffff8118da84>] ? unlock_page+0x74/0x80
[267338.532399]  [<ffffffff8118e293>] ? filemap_map_pages+0x1e3/0x2a0
[267338.532402]  [<ffffffff814dbc0f>] tty_ioctl+0x35f/0xc40
[267338.532404]  [<ffffffff811c2933>] ? handle_mm_fault+0x1343/0x1ae0
[267338.532406]  [<ffffffff812296f1>] do_vfs_ioctl+0xa1/0x5b0
[267338.532409]  [<ffffffff8106aa64>] ? __do_page_fault+0x1b4/0x400
[267338.532410]  [<ffffffff81229c79>] SyS_ioctl+0x79/0x90
[267338.532412]  [<ffffffff81825832>] entry_SYSCALL_64_fastpath+0x16/0x71
[267338.532413] ---[ end trace 5a9b062a79c04de3 ]---

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