[Bug 91627] New: KMS failed on DisplayPort with 750 Ti

[Bug 91627] New: KMS failed on DisplayPort with 750 Ti

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

            Bug ID: 91627
           Summary: KMS failed on DisplayPort with 750 Ti
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

I have an EVGA GeForce 750 Ti connected to an EIZO EV2336W. nouveau modesets
successfully with TMDS outputs (DVI/HDMI), but with DP it gives black screen
once it attempts to do so. Attached are the kernel debug logs of the failed DP
and the working DVI/HDMI for reference.

Arch Linux with linux 4.1.4-1 in the core repo.

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[Bug 91627] KMS failed on DisplayPort with 750 Ti

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

--- Comment #1 from Tom Yan <tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 117668
  --> https://bugs.freedesktop.org/attachment.cgi?id=117668&action=edit
debug log with DP connected

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[Bug 91627] KMS failed on DisplayPort with 750 Ti

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

--- Comment #2 from Tom Yan <tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 117669
  --> https://bugs.freedesktop.org/attachment.cgi?id=117669&action=edit
debug log with dvi/hdmi connected

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[Bug 91627] KMS failed on DisplayPort with 750 Ti

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

Tom Yan <tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #117669|debug log with dvi/hdmi     |debug log with DVI/HDMI
        description|connected                   |connected

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[Bug 91627] [NV117] KMS failed on DisplayPort with 750 Ti

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|KMS failed on DisplayPort   |[NV117] KMS failed on
                   |with 750 Ti                 |DisplayPort with 750 Ti

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[Bug 91627] [NV117] KMS failed on DisplayPort with 750 Ti

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

--- Comment #3 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
There are some fixes for a K620 (GM107) board here:

http://cgit.freedesktop.org/~darktama/nouveau/log/?id=9ce7d1009c64045a0875640b4cb4ae55e0c7aa87

You can try applying them to your kernel and see if the situation improves.

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[Bug 91627] [NV117] KMS failed on DisplayPort with 750 Ti

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https://bugs.freedesktop.org/show_bug.cgi?id=91627

Tom Yan <tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from Tom Yan <tom.ty89-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I applied the four patches by Ben Skeggs to linux-4.1.5 and now KMS works like
a charm with DP. Thanks a lot!

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