[Bug 110808] New: display stops updating after VT switch

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110808

            Bug ID: 110808
           Summary: display stops updating after VT switch
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: ross at kallisti.us
        QA Contact: xorg-team at lists.x.org

Created attachment 144404
  --> https://bugs.freedesktop.org/attachment.cgi?id=144404&action=edit
xserver log file

After starting Xorg with the AMDGPU driver, I switch to a different VT.
When I switch back to X, the display has frozen.  Only the mouse cursor
moves.  To reproduce:

1) From a linux console with no display manager or X session running:
    $ startx /usr/bin/xterm
2) Switch to a different VT and back.
3) Nothing appears in the xterm when typing.
4) Switch to a different VT and back, the old typing appears.

The screen isn't updating correctly but the client & server are
functioning.  I can run commands in the terminal, but can't see any
output without a VT switch.  Exiting the xterm immediately ends the X
session cleanly.

The same issue is triggered by a suspend/resume cycle.

This is using amdgpu 19.0.1 from Debian sid.  Same issue with the version in
buster (18.1.99+git20190207-1)

Video device info:
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Stoney [Radeon R2/R3/R4/R5 Graphics] [1002:98e4] (rev eb)

Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929822

Ross

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