Public bug reported:

It looks an awful lot like this issue :
https://gitlab.freedesktop.org/drm/amd/-/issues/1427.

I'm hitting these:
[11596.268677] [drm:dce112_get_pix_clk_dividers [amdgpu]] *ERROR* 
dce112_get_pix_clk_dividers: Invalid parameters!!
[11596.269781] [drm:dm_restore_drm_connector_state [amdgpu]] *ERROR* Restoring 
old state failed with -22

Switching to tty2 wakes it up and allows me to switch back and recover
my xorg session.

Should this be filed against the kernel, xorg, or amd drivers? I'm not
sure..

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-66.74-generic 5.4.86
Uname: Linux 5.4.0-66-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: KDE
Date: Thu Feb 25 21:07:28 2021
DistUpgraded: 2020-04-22 17:41:41,681 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 6.1.16, 5.4.0-64-generic, x86_64: installed
 virtualbox, 6.1.16, 5.4.0-65-generic, x86_64: installed
 virtualbox, 6.1.16, 5.4.0-66-generic, x86_64: installed
 zfs, 0.8.3, 5.4.0-65-generic, x86_64: installed
 zfs, 0.8.3, 5.4.0-66-generic, x86_64: installed (WARNING! Diff between built 
and installed module!) (WARNING! Diff between built and installed module!) 
(WARNING! Diff between built and installed module!) (WARNING! Diff between 
built and installed module!) (WARNING! Diff between built and installed 
module!) (WARNING! Diff between built and installed module!) (WARNING! Diff 
between built and installed module!) (WARNING! Diff between built and installed 
module!)
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Lexa PRO [Radeon 540/540X/550/550X / RX 
540X/550/550X] [1002:699f] (rev c7) (prog-if 00 [VGA controller])
   Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Lexa PRO [Radeon 
540/540X/550/550X / RX 540X/550/550X] [1002:0b04]
 NVIDIA Corporation GP104 [GeForce GTX 1070] [10de:1b81] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd GP104 [GeForce GTX 1070] [1458:3701]
InstallationDate: Installed on 2019-08-15 (560 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
MachineType: Gigabyte Technology Co., Ltd. X570 AORUS PRO
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_fnpezh@/vmlinuz-5.4.0-66-generic 
root=ZFS=rpool/ROOT/ubuntu_fnpezh ro usbcore.autosuspend=-1 quiet splash 
amd_iommu=on iommu=pt video=efifb:off,vesafb=off,simplefb=off nouveau.modeset=0 
rd.driver.blacklist=nouveau,nvidia,nvidia_uvm,nvidia_drm,nvidia_modeset 
usbhid.quirks=0x1b1c:0x1b44:0x20000408 usbcore.quirks=1b1c:1b44:gn 
crashkernel=384M vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-22 (309 days ago)
dmi.bios.date: 02/17/2021
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F33c
dmi.board.asset.tag: Default string
dmi.board.name: X570 AORUS PRO
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: 
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrF33c:bd02/17/2021:svnGigabyteTechnologyCo.,Ltd.:pnX570AORUSPRO:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnX570AORUSPRO:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: X570 MB
dmi.product.name: X570 AORUS PRO
dmi.product.sku: Default string
dmi.product.version: -CF
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2020-03-23T10:46:45.197962
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal kubuntu ubuntu

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https://bugs.launchpad.net/bugs/1916950

Title:
  Screen fails to wake up after sleep

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