I now discovered, that webrender is disabled by default in Firefox 101
on Ubuntu. So the question is, why it is enabled by default in
Thunderbird.
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https://bugs.launchpad.net/bugs/1959747
From another side I got the hint, that miss-configured (web)rendering could be
the source of the problem and cause lots of time spent in error logging. See:
https://bugzilla.mozilla.org/show_bug.cgi?id=1772673#c11
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I'm having similar problems in 1:91.10.0+build1-0ubuntu0.20.04.1 with
Thunderbird's CPU usage well over 25 % and for long periods and
additionally causing root process Xorg to consume 15 % CPU.
See also: https://bugzilla.mozilla.org/show_bug.cgi?id=1772673
The workaround for me is:
If I revert the above settings then the problem gets even worse. So it
seems we might have multiple different 100% CPU bugs now.
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Title:
I'm having similar problems again in 1:91.9.1+build1-0ubuntu0.20.04.1
with Thunderbird's CPU usage well over 100% and long periods of not
responding since the update.
But the fix for the original problem is still active:
gfx.webrender.all = false
gfx.webrender.force-disabled = true
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I have
Ubuntu 22.04 LTS,
8GB RAM,
i5 4-Core Intel CPU,
SSD,
It's a Laptop.
I am facing same issue, I have installed Thunderbird 91.8.0 (64-bit),
and the CPU usage is high and the interface is not responsive, the
cursor lags, feels heavy while using.
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** Summary changed:
- [upstream] Very high CPU and slow responsiveness in Thunderbird 91.5.0
+ [upstream] Very high CPU and slow responsiveness in Thunderbird 91
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