(In reply to Fabian Rodriguez:MagicFab from comment #13) > I see at least two reports confirming this in Mozilla Thunderbird support, > including Windows, Mac and GNU/Linux - and I have the same problem (TB 91.1.2 > on Windows 10). > > This makes Thunderbird slow to the point it can't be used normally. > > A possible workaround was mentioned here : > https://support.mozilla.org/en-US/questions/1347196#answer-1435915 > > > If I go to preferences --> config editor and search for the entries: > > > > gfx.webrender.all > > gfx.webrender.force-disabled > > > > Switch the first one to false (it was already switched to false) and the > > second one to true (I switched this one manually) > > everything works smooths and no cpu usage jumps happen. > > I suggest raising importance/severity. People upgrading seldom backup their > Thunderbird profile and when this happens, all the usual "Thunderbird is > slow" are being tried without a solution, bringing a user closer to stop > using Thunderbird and go to other options. > > A few references to people reporting this problem : > > * https://support.mozilla.org/en-US/questions/1347196 > * https://support.mozilla.org/en-US/questions/1351874
The mentioned parameter (gfx...force-disabled) is gone from configuration in 102 . Reinstating the parm helps some but doesn't fix the 100% CPU utilization. (5.15.0-52-generic #58~20.04.1-Ubuntu SMP on Intel Core i7-2760QM) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1959747 Title: [upstream] Very high CPU and slow responsiveness in Thunderbird 91-102 Status in Mozilla Thunderbird: Confirmed Status in thunderbird package in Ubuntu: Triaged Bug description: Very high CPU and slow responsiveness in Thunderbird 91.5.0 and later. Just moving the mouse cursor over a message list results in 365% CPU for me. I had to set this in the config editor to fix it: gfx.webrender.force-disabled = TRUE Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1730423 To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1959747/+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
