In Ubuntu 21.04 in standard Ubuntu (Wayland) session on maximized Firefox 91 window when clicked on a hamburger menu, the menu starts to flicker. It happens on the DELL Inspiron 15 3000 laptop with the following graphic unit:
01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Jet PRO [Radeon R5 M230 / R7 M260DX / Radeon 520 Mobile] (rev c3)
It doesn't flicker on Xorg session, neither on another laptop with Intel graphics. It also doesn't happen when the window is not tied to the right screen edge.
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ProblemType: Bug
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: milos 1632 F.... pulseaudio
BuildID: 20210804193234
CasperMD5CheckResult: unknown
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:352
DefaultProfilePrefSources: prefs.js
DefaultProfileThemes: extensions.sqlite corrupt or missing
DistroRelease: Ubuntu 21.04
ForcedLayersAccel: False
InstallationDate: Installed on 2019-10-17 (671 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
IpRoute:
default via 192.168.0.1 dev wlp3s0 proto dhcp metric 600
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown
192.168.0.0/24 dev wlp3s0 proto kernel scope link src 192.168.0.19 metric 600
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
Package: firefox 91.0+build2-0ubuntu0.21.04.1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.11.0-31.33-generic 5.11.22
Profile0Extensions: extensions.sqlite corrupt or missing
Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
Profile0Locales: extensions.sqlite corrupt or missing
Profile0Plugins: Shockwave Flash - /usr/lib64/flash-plugin/libflashplayer.so
Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:352
Profile0PrefSources: prefs.js
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
Profile1 (Default) - LastVersion=91.0/20210804193234 (In use)
Profile0 - LastVersion=90.0.2/20210804102508 (Out of date)
RunningIncompatibleAddons: False
Tags: wayland-session hirsute
Uname: Linux 5.11.0-31-generic x86_64
UpgradeStatus: Upgraded to hirsute on 2021-04-23 (118 days ago)
UserGroups: adm cdrom dip libvirt lpadmin lxd plugdev sambashare sudo ubridge
_MarkForUpload: True
dmi.bios.date: 11/19/2018
dmi.bios.release: 1.0
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.0.0
dmi.board.name: 02G1KD
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.0.0:bd11/19/2018:br1.0:svnDellInc.:pnInspiron3580:pvr:rvnDellInc.:rn02G1KD:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3580
dmi.product.sku: 08C9
dmi.sys.vendor: Dell Inc.
Same as https:/