Public bug reported:
Just did a fresh install of Ubuntu 20.04 LTS and everything was fine,
display worked perfect. Then I put the machine in Suspend mode (by
clicking on GUI button), left for 5 minutes, came back, woke up the
machine (by clicking a key on the keyboard), and upon waking up, the
display started flickering heavily.
Relevant Specs (Sorry if I missed anything):
AMD® Ryzen 9 3900x 12-core processor × 24
AMD® Radeon rx 5700 xt
GNOME version 3.36.1
Windowing System X11
I am running 3 monitors: Samsung with resolution 3840x2160 and 2 LG monitors
with resolution 1920x1080, all at 60Hz
Most of the flickering is happening on Samsung, although once in a
while, other monitors flicker a little bit as well.
Things to note: When I switch Samsung to lower resolution, the
flickering goes away. When I come back to 3840x2160, it comes back. When
I switch to lower resolution, suspend and come back, everything is fine.
If I reboot the machine, the display is fine until I suspend and wake up
again (if I am in higher resolution).
I tried changing the refresh rate of Samsung to 30.00 and 29.97 (the
only two available when I turn off FreeSync), and the issue still
persists. Turning FreeSync on and off does nothing.
Thank you,
Pavel.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-26-generic 5.4.0-26.30
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: pavel 1870 F.... pulseaudio
/dev/snd/controlC0: pavel 1870 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 23 21:14:00 2020
InstallationDate: Installed on 2020-04-23 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: System manufacturer System Product Name
ProcEnviron:
LANGUAGE=en_CA:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-26-generic
root=UUID=02f6301e-c22b-462d-a4e5-71a78b7eb203 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-26-generic N/A
linux-backports-modules-5.4.0-26-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/19/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1405
dmi.board.asset.tag: Default string
dmi.board.name: TUF GAMING X570-PLUS (WI-FI)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1405:bd11/19/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFGAMINGX570-PLUS(WI-FI):rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1874588
Title:
Flickering screen after waking up from Suspend
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