Indeed according to the upstream bug report, and to the associated KDE bug report (https://bugs.kde.org/show_bug.cgi?id=428499), this should be fixed in kwin 5.21.0, which is in Ubuntu 21.04.
** Bug watch added: KDE Bug Tracking System #428499 https://bugs.kde.org/show_bug.cgi?id=428499 ** Summary changed: - Firefox unusable on Kubuntu 21.04 Wayland session + Firefox is repainting only on re-focusing in Kubuntu 21.04 Wayland session -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1922438 Title: Firefox is repainting only on re-focusing in Kubuntu 21.04 Wayland session Status in firefox package in Ubuntu: Confirmed Bug description: I tried Wayland session on a Kubuntu 21.04 beta live usb. Firefox is practically unusable since it refreshes the screen only on re-focusing like described in this bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1616894 Unfortunately, setting widget.wayland_vsync.enabled to false does not make any difference. Also tried starting firefox from terminal with MOZ_ENABLE_WAYLAND=1, again no difference. According to the above bug report this should be fixed, no? ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: firefox 87.0+build3-0ubuntu2 ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7 Uname: Linux 5.11.0-13-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu61 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kubuntu 4308 F.... pulseaudio BuildID: 20210318103112 CasperMD5CheckResult: pass CasperVersion: 1.461 Channel: Unavailable CurrentDesktop: KDE Date: Sat Apr 3 15:54:32 2021 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 DefaultProfileThemes: extensions.sqlite corrupt or missing ForcedLayersAccel: False IpRoute: default via 192.168.10.1 dev enp0s31f6 proto dhcp metric 100 169.254.0.0/16 dev enp0s31f6 scope link metric 1000 192.168.10.0/24 dev enp0s31f6 proto kernel scope link src 192.168.10.20 metric 100 LiveMediaBuild: Kubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1) Profile0Extensions: extensions.sqlite corrupt or missing Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) Profile0Locales: extensions.sqlite corrupt or missing 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=None/None (Out of date) Profile0 - LastVersion=87.0/20210318103112 (In use) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/07/2021 dmi.bios.release: 1.18 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.18.0 dmi.board.name: 0KP0FT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.18.0:bd01/07/2021:br1.18:svnDellInc.:pnLatitude7490:pvr:rvnDellInc.:rn0KP0FT:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Latitude dmi.product.name: Latitude 7490 dmi.product.sku: 081C dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1922438/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
