[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected)

[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

            Bug ID: 106718
           Summary: On Ubuntu Bionic with kernels 4.15 and above, RX480
                    Displayport outputs don't work (dmesg reports "not
                    connected)
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: icekhaos@hotmail.com

Anything from at least 4.15 up to 4.17-rc1 under Bionic makes the Displayport
connections fail to even detect a display, while anything 4.14.x works and
detects it perfectly.

Is the PCI ROM error related? Is this a duplicate? I can provide xorg logs
later today.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

Pixie <icekhaos@hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|On Ubuntu Bionic with       |On Ubuntu Bionic with
                   |kernels 4.15 and above,     |kernels 4.15 and above,
                   |RX480 Displayport outputs   |RX480 Displayport outputs
                   |don't work (dmesg reports   |don't work (dmesg reports
                   |"not connected)             |"not connected")

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Please attach the dmesg output as well as the Xorg log file.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #2 from Pixie <icekhaos@hotmail.com> ---
Alright. Will do in a couple hours, when booted on newer kernels. Currently
booted on an old one, probably good to include it as well for comparison's
sake. Google turned up nothing on this issue either, so I came here.

Would a Displayport to DVI converter have anything to do with recent changes?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Can you narrow down the regression or better yet bisect?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #4 from Pixie <icekhaos@hotmail.com> ---
If instructed how, I would definitely be willing to bisect.

Power went out, fell asleep, no xorg logs during the day. Sorry for the delay,
a working log/dmesg combo on 4.14.35 coming up shortly, for reference.

This breaks on any kernel 4.15 and above, by the way. Decided to report it
against whatever is present in 4.17, since the issue still persists there.

And if I can get rc4 to install, I'll test that and provide the logs from that.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #5 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139875
  --> https://bugs.freedesktop.org/attachment.cgi?id=139875&action=edit
dmesg log on a working setup (kernel 4.14.35, latest stable mesa)

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #6 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139876
  --> https://bugs.freedesktop.org/attachment.cgi?id=139876&action=edit
Xorg log on the same functional 4.14.35 setup.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #7 from Pixie <icekhaos@hotmail.com> ---
Logs from working software submitted. Booting promptly into a newer kernel and
salvaging logs from there.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #8 from Pixie <icekhaos@hotmail.com> ---
Nope, fell flat on its face. rc1 logs coming shortly.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #9 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139877
  --> https://bugs.freedesktop.org/attachment.cgi?id=139877&action=edit
dmesg from a broken 4.17-rc1 setup; look here for the errors

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #10 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139878
  --> https://bugs.freedesktop.org/attachment.cgi?id=139878&action=edit
Xorg log on the broken 4.17-rc1 setup

The broken Xorg log doesn't even seem to acknowledge the monitor exists through
a quick grep.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #11 from Pixie <icekhaos@hotmail.com> ---
Seems somewhere between what looks like versions 3.19 and 3.25.

Gonna guess 4.15 has an earlier version; gonna fetch logs from that shortly.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #12 from Pixie <icekhaos@hotmail.com> ---
Seems like I had the right idea.

4.15 runs amdgpu 3.23. May install a Mesa git version from a PPA after this to
check.

Really want the new kernels, so I'm probably gonna do that right away after
posting the two logs.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #13 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139879
  --> https://bugs.freedesktop.org/attachment.cgi?id=139879&action=edit
Broken dmesg on 4.15

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #14 from Pixie <icekhaos@hotmail.com> ---
Created attachment 139880
  --> https://bugs.freedesktop.org/attachment.cgi?id=139880&action=edit
Broken Xorg log on 4.15

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #15 from Pixie <icekhaos@hotmail.com> ---
That Git install doesn't seem to have changed anything visible. Doesn't show in
logs either, which is weird.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #16 from Pixie <icekhaos@hotmail.com> ---
Running glxgears gives me a GL version of 3.1 Mesa 18.2.0-devel, that the one
I'm looking for?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com

--- Comment #17 from Michel Dänzer <michel@daenzer.net> ---
Does amdgpu.dc=0 on the kernel command line work around the problem?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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--- Comment #18 from Pixie <icekhaos@hotmail.com> ---
Where would I enter that?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #19 from Alex Deucher <alexdeucher@gmail.com> ---
on the kernel command line in grub.

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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https://bugs.freedesktop.org/show_bug.cgi?id=106718

--- Comment #20 from Pixie <icekhaos@hotmail.com> ---
Sorry for the late reply; yes, amdgpu.dc=0 fixes it.

What does that even do?

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[Bug 106718] On Ubuntu Bionic with kernels 4.15 and above, RX480 Displayport outputs don't work (dmesg reports "not connected")

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Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #21 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/406.

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