Thanks for the report David, and for the screencast that demonstrates the problem. Could you test the upstream firefox build at https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64 and let me know whether it's exhibiting the same problem?
-- 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/1870259 Title: firefox fullscreen display glitches with hidpi scalingb Status in firefox package in Ubuntu: New Bug description: When I go on fullscreen on a video on Firefox with HIDPI scaling factors more than 100%, I get odd behavior of the fullscreen video. This behavior is not seen on Chrome, or if the scaling factor is 100%. Basically, it seems like there is some resizing of the video to a smaller window in the upper left, and when I escape fullscreen, sometimes the firefox window itself is scaled off the display. At times, this glitches a few times and eventually resets, sometimes, it stays this way. It appears to have changed behavior multiple times over the past few weeks of updates of various parts of the stack, and may just be narrowed down for me now to something repeatable. For instance sometimes I could not trigger it until I pressed volume up or volume down. Now it appears to happen just waiting for a few seconds on the running video. This is on X11, and on focal with the latest updates as of today 2020-04-01. Happy to debug more, not sure what information is useful. thanks! ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 74.0+build3-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu21 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dpb 1522 F.... pulseaudio BuildID: 20200309095159 Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Wed Apr 1 21:12:08 2020 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:729 DefaultProfileThemes: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2020-02-22 (39 days ago) InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1) IpRoute: default via 10.10.0.1 dev wlp4s0 proto dhcp metric 600 10.10.0.0/16 dev wlp4s0 proto kernel scope link src 10.10.1.4 metric 600 169.254.0.0/16 dev wlp4s0 scope link metric 1000 ProcEnviron: TERM=screen-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash 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:729 Profile0PrefSources: prefs.js Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=74.0/20200309095159 RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: Upgraded to focal on 2020-02-22 (39 days ago) dmi.bios.date: 11/25/2019 dmi.bios.vendor: LENOVO dmi.bios.version: N1MET59W (1.44 ) dmi.board.asset.tag: Not Available dmi.board.name: 20HRCTO1WW dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1MET59W(1.44):bd11/25/2019:svnLENOVO:pn20HRCTO1WW:pvrThinkPadX1Carbon5th:rvnLENOVO:rn20HRCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 5th dmi.product.name: 20HRCTO1WW dmi.product.sku: LENOVO_MT_20HR_BU_Think_FM_ThinkPad X1 Carbon 5th dmi.product.version: ThinkPad X1 Carbon 5th dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1870259/+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
