[Bug 111831] New: Haswell graphics break under 4.4.1: sna_mode_shutdown_crtc: invalid state found on pipe 0

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=111831

            Bug ID: 111831
           Summary: Haswell graphics break under 4.4.1:
                    sna_mode_shutdown_crtc: invalid state found on pipe 0
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.4.1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: da_audiophile at yahoo.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 202891
  --> https://bugzilla.kernel.org/attachment.cgi?id=202891&action=edit
Xorg.log

I am running 4.4.1 on Arch x86_64 and have noticed that this update (coming
from 3.4.5) causes breakage of Xorg where the monitor goes to sleep but does
not wake up from the sleep state. I have to `systemctl restart display-manager`
in order to revive the Xorg display. I attached my full /var/log/Xorg.log but
the error is shown below and there is nothing relevant in the output of dmesg:

(EE) intel(0): sna_mode_shutdown_crtc: invalid state found on pipe 0, disabling
CRTC:21

This machine is an Intel i7-4790K (Haswell) using the onboard graphics chip
connected to the monitor via HDMI.  I am using the distro provided drivers
(xf86-video-intel 1:2.99.917+519+g8229390).  I am glad to provide additional
debug info upon request.

I have just rebooted using the 'drm.debug=14' kernel parameter and will update
the report if I am able to uncover any helpful troubleshooting data with it.

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