[Bug 100992] New: vblank wait timed out on crtc 0 after screen lock on Dell Latitude e6220

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100992

            Bug ID: 100992
           Summary: vblank wait timed out on crtc 0 after screen lock on
                    Dell Latitude e6220
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: thomas at junovagen.se
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

After a screen lock, the screen hangs, with the following stack dump in dmesg:

[46276.425098] WARNING: CPU: 0 PID: 4082 at
/build/linux-FyIZxz/linux-4.4.0/drivers/gpu/d
[46276.425103] vblank wait timed out on crtc 0
[46276.425107] Modules linked in: rfcomm arc4 md4 nls_utf8 cifs fscache bnep
dell_wmi spa_smm_hwmon wl(POE) snd_hda_codec_hdmi irqbypass crct10dif_pclmul
crc32_pclmul ghash_clmulr cryptd snd_hda_intel uvcvideo cdc_ncm snd_hda_codec
usbnet videobuf2_vmalloc mii videoboydev media btrtl btbcm snd_seq_midi btintel
snd_seq_midi_event bluetooth snd_rawmidi inp
[46276.425219]  dell_smo8800 mac_hid parport_pc ppdev lp parport autofs4
hid_generic usbhpci libahci sdhci ptp pps_core wmi fjes video
[46276.425266] CPU: 0 PID: 4082 Comm: Xorg Tainted: P        W  OE  
4.4.0-77-generic #98
[46276.425270] Hardware name: Dell Inc. Latitude E6220/0R97MN, BIOS A12
06/28/2013
[46276.425274]  0000000000000286 0000000070ffd816 ffff8800c385bb08
ffffffff813f8493
[46276.425282]  ffff8800c385bb50 ffffffffc009db38 ffff8800c385bb40
ffffffff81081302
[46276.425288]  ffff8800356c4000 0000000000000000 0000000000000000
000000000002cc9d
[46276.425295] Call Trace:
[46276.425307]  [<ffffffff813f8493>] dump_stack+0x63/0x90
[46276.425318]  [<ffffffff81081302>] warn_slowpath_common+0x82/0xc0
[46276.425325]  [<ffffffff8108139c>] warn_slowpath_fmt+0x5c/0x80
[46276.425337]  [<ffffffff810c3da5>] ? finish_wait+0x55/0x70
[46276.425375]  [<ffffffffc006d2b5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm]
[46276.425386]  [<ffffffff810c4240>] ? wake_atomic_t_function+0x60/0x60
[46276.425471]  [<ffffffffc0235e3a>] intel_atomic_commit+0x43a/0x6f0 [i915]
[46276.425519]  [<ffffffffc0087037>] drm_atomic_commit+0x37/0x60 [drm]
[46276.425545]  [<ffffffffc018fdc6>] drm_atomic_helper_set_config+0x76/0xb0
[drm_kms_help
[46276.425581]  [<ffffffffc0075e12>] drm_mode_set_config_internal+0x62/0x100
[drm]
[46276.425614]  [<ffffffffc007a46c>] drm_mode_setcrtc+0x3cc/0x4f0 [drm]
[46276.425642]  [<ffffffffc006b722>] drm_ioctl+0x152/0x540 [drm]
[46276.425672]  [<ffffffffc007a0a0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[46276.425681]  [<ffffffff81222c6f>] do_vfs_ioctl+0x29f/0x490
[46276.425689]  [<ffffffff8108e5a1>] ? __set_task_blocked+0x41/0xa0
[46276.425696]  [<ffffffff81090f36>] ? __set_current_blocked+0x36/0x60
[46276.425702]  [<ffffffff81222ed9>] SyS_ioctl+0x79/0x90
[46276.425712]  [<ffffffff8183b972>] entry_SYSCALL_64_fastpath+0x16/0x71
[46276.425717] ---[ end trace 6929fd69fa421ae3 ]---


I've seen multiple bug reports with similar effect, but the workaround has been
"video=SVIDEO-1:d" as boot parameters, but this does not affect my case. Also,
the other reports, such as  bug 93782, includes 'intel_tv_detect' which mine
does not.

I originally filed this
here:https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1689651, where I've
filed many logs.

But will try to build drm-tip and make sure it still is there (although bug
93782 seems to indicate that it is), and report back here.

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