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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 110250] [Regression linux 5.1-rc1] Displayport 1.2 tty second monitor corruption
Date: Tue, 26 Mar 2019 21:58:06 +0000	[thread overview]
Message-ID: <bug-110250-502@http.bugs.freedesktop.org/> (raw)


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https://bugs.freedesktop.org/show_bug.cgi?id=110250

            Bug ID: 110250
           Summary: [Regression linux 5.1-rc1] Displayport 1.2 tty second
                    monitor corruption
           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: freedesktop@sibrenvasse.nl

Created attachment 143781
  --> https://bugs.freedesktop.org/attachment.cgi?id=143781&action=edit
Bisect log & result

I have two monitors daisy chained via Displayport 1.2.

GPU: Radeon RX 570 4GB
amdgpu.dc=1 (issue does not occur when disabled)

After upgrading to Linux 5.1-rc1 when switching to a tty the second monitor
(that's connected to the first) displays a corrupted version of the first
monitor. Previously this would display a stretched version of monitor 1
(because of a different aspect ratio).

There is no output in dmesg when switching to a tty.

I have bisected the issue between tags v5.0 and v5.1-rc1. The result was
bc7f670ee04cd619f8c4627c37d77b3618bc5edd as the first bad commit. Bisect log
attached.

commit 8a48b44cd00f10e83f573b9028d11bd90a36de26
GOOD

commit bc7f670ee04cd619f8c4627c37d77b3618bc5edd
BAD
After switching from graphical environment to a tty, the second monitor will
keep displaying the last frame of the graphical environment.

commit b2e85302494a6b7d3a3006c8d80a729377600628
BAD
Screen display is corrupted.

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             reply	other threads:[~2019-03-26 21:58 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-26 21:58 bugzilla-daemon [this message]
2019-03-27  9:09 ` [Bug 110250] [Regression linux 5.1-rc1] Displayport 1.2 tty second monitor corruption bugzilla-daemon
2019-04-01 18:42 ` bugzilla-daemon
2019-04-01 19:08 ` bugzilla-daemon
2019-05-06 13:03 ` bugzilla-daemon

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