Comment 4 for bug 1849084

Yes, this bug also affects me.
I upgrade from Kubuntu 19.04 with 5.0 kernel to 19.10 with 5.3 kernel, and got described behaviour:

1. On 5.0 there is no problems (if I boot it in 19.10)
2. on 5.3 with default settings - there is a black screen after try to resume.
3. If I choose XRender with 5.3 in plasma settings - no problems.

current kernel 5.3.0-19-generic #20-Ubuntu SMP Fri Oct 18 09:04:39
I have no traces of oops in log, journalctl -b -1 -k show only
kernel: PM: suspend entry (deep)
string before resume/hang at black screen.

current driver xserver-xorg-video-amdgpu 19.0.1-1ubuntu1 amd64
xorg log
[ 10.353] (II) AMDGPU(0): glamor X acceleration enabled on AMD RAVEN (DRM 3.33.0, 5.3.0-19-generic, LLVM 9.0.0)
[ 10.353] (II) AMDGPU(0): glamor detected, initialising EGL layer.
[ 10.353] (==) AMDGPU(0): TearFree property default: auto
[ 10.353] (==) AMDGPU(0): VariableRefresh: disabled
[ 10.353] (II) AMDGPU(0): KMS Pageflipping: enabled

notebook with attached monitor
[ 10.396] (II) AMDGPU(0): EDID for output eDP
[ 10.396] (II) AMDGPU(0): Manufacturer: BOE Model: 6a5 Serial#: 0
[ 10.396] (II) AMDGPU(0): Year: 2015 Week: 1
[ 10.396] (II) AMDGPU(0): EDID Version: 1.4
[ 10.396] (II) AMDGPU(0): Digital Display Input
[ 10.396] (II) AMDGPU(0): 6 bits per channel
[ 10.396] (II) AMDGPU(0): Digital interface is DisplayPort
[ 10.397] (II) AMDGPU(0): EDID for output HDMI-A-0
[ 10.397] (II) AMDGPU(0): Manufacturer: BNQ Model: 801b Serial#: 21573
[ 10.397] (II) AMDGPU(0): Year: 2017 Week: 15
[ 10.397] (II) AMDGPU(0): EDID Version: 1.3
[ 10.397] (II) AMDGPU(0): Digital Display Input
[ 10.398] (II) AMDGPU(0): Output eDP connected
[ 10.398] (II) AMDGPU(0): Output HDMI-A-0 connected
[ 10.398] (II) AMDGPU(0): Using spanning desktop for initial modes
[ 10.398] (II) AMDGPU(0): Output eDP using initial mode 1366x768 +0+0
[ 10.398] (II) AMDGPU(0): Output HDMI-A-0 using initial mode 2560x1440 +1366+0
[ 10.399] (II) AMDGPU(0): [DRI2] Setup complete
[ 10.399] (II) AMDGPU(0): [DRI2] DRI driver: radeonsi
[ 10.399] (II) AMDGPU(0): [DRI2] VDPAU driver: radeonsi
[ 10.533] (II) AMDGPU(0): Front buffer pitch: 15872 bytes
[ 10.534] (II) AMDGPU(0): SYNC extension fences enabled
[ 10.534] (II) AMDGPU(0): Present extension enabled
[ 10.534] (==) AMDGPU(0): DRI3 enabled
[ 10.534] (==) AMDGPU(0): Backing store enabled
[ 10.534] (II) AMDGPU(0): Direct rendering enabled
[ 10.541] (II) AMDGPU(0): Use GLAMOR acceleration.
[ 10.541] (II) AMDGPU(0): Acceleration enabled
[ 10.541] (==) AMDGPU(0): DPMS enabled
[ 10.541] (==) AMDGPU(0): Silken mouse enabled
[ 10.541] (II) AMDGPU(0): Set up textured video (glamor)