[Bug 110117] Waking from Suspend causes screen to appear with grey static (like a TV with no signal)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110117

            Bug ID: 110117
           Summary: Waking from Suspend causes screen to appear with grey
                    static (like a TV with no signal)
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: stein12c at gmail.com

Created attachment 143671
  --> https://bugs.freedesktop.org/attachment.cgi?id=143671&action=edit
journalctl -b -1 -k

I am running Ubuntu 18.10. This is the PH517-61 Acer Predator Helios 500 with
the Ryzen processor. I have temporarily disabled suspend. If I do let the
laptop suspend and then hit the keyboard I get what appears to be a TV with no
signal. At this point I manually power down and then power up again and am able
to view things on screen.

I have reported this downstream here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813820

in log.txt I have attached the output of 'journalctl -b -1 -k'

uname -a: 5.0.2-050002-generic #201903131832 SMP Wed Mar 13 22:35:19 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux

Loaded newer kernel from this source:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0.2/

This is a Vega 56 card but here is what I get with this command:
lspci -k | grep -EA3 'VGA|3D|Display'
08:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Vega
10 XT [Radeon RX Vega 64] (rev c7)
        Subsystem: Acer Incorporated [ALI] Vega 10 XT [Radeon RX Vega 64]
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

glxinfo | grep "OpenGL version"
OpenGL version string: 4.4 (Compatibility Profile) Mesa 18.2.2



Expected Behaviour:
I expect to continue to be able to use my machine normally and be able to see
what is happening on screen.

Actual Behaviour:
Static on screen obscures everything.

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