Thunderbird screen freezes frequently
Categories
(Calendar :: General, defect)
Tracking
(Not tracked)
People
(Reporter: michael, Unassigned)
Details
(Keywords: perf)
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/109.0
Steps to reproduce:
Configure Thunderbird with an IMAP account and a CalDAV/CardDAV account. (The IMAP accpunt is in the cloud, CalDAV/CardDAV is on a server in the same LAN, but that may not be relevant).
Start Thunderbird and use it normally: browse email, write messages, work with Tasks and Calendar
Actual results:
The application window frequently freezes and no longer responds to user input, then unfreezes after a while (I would estimate from 10 seconds up to at least a minute). These freezes happen unpredictably and frequently enough to be annoying.
While the screen is frozen, user input still seems to get processed: keyboard input becomes visible after the screen unfreezes; mouse clicks get handled by the control that should have been in this place β it looks like a redraw issue, while the internal state of windows and controls is updated correctly.
Suspecting this to have something to do with network transactions, I have indeed managed to provoke this issue by initiating something that would trigger a request to the CalDAV server, such as marking a task complete or starting synchronization. This causes the screen to freeze instantly for approximately a minute.
However, some of the freezes are seemingly random, so it may not be CalDAV/CardDAV alone.
The CalDAV/CardDAV server is not reachable when I am on the road (it is configured in the profile but the DNS name does not resolve), but I am still getting random freezes in both cases.
I am on Ubuntu MATE, with Thunderbird from the Ubuntu repos. It started after I upgraded from Ubuntu 20.04 to 22.04, around October 2022. I usually apply updates from the official repos within 24h (only kernel updates may take longer). I have noticed this behavior since at least Thunderbird 102.4.2, currently on 102.7.1.
Behavior seems similar to bug #1775032, but I am not sure if we are both seeing the exact same thing. I have asked for clarification there β if it turns out to be the same issue, feel free to close this as a dupe after copying all relevant information over.
This has also been reported to Ubuntu MATE as https://bugs.launchpad.net/ubuntu-mate/+bug/2000415.
Expected results:
Everything works normally; screen responds to user input and redraws accordingly
Updated•2 years ago
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Comment 1•1 year ago
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Are you seeing Bug 1849540 - Thunderbird freezes when adding CalDAV calendar with VTIMEZONE ?
Reporter | ||
Comment 2•1 year ago
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I am not seeing the freezing behavior described in that ticket (TB freezes indefinitely with CPU at 100%). CPU seems to be at less than 100% as far as I can tell, and Thunderbird so far has recovered every time.
However, I cannot tell for sure whether I have calendar entries with VTIMEZONE. I do see, however, Thunderbird freezing reproducibly for around 30 seconds with high CPU load (oscillating, seldom reaching 100%) when I switch to the calendar tab and switch months/years.
Description
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