I hope this helps: I see these errors in my syslog:
Nov 4 10:43:32 parse2 gnome-shell[4026701]: JS ERROR: TypeError:
windowActor is
null#012_addWindowEffect@resource:///org/gnome/shell/ui/closeDialog.js:90:28#012vfunc_show@resource:///org/gnome/shell/ui/closeDialog.js:162:14
Nov 4 11:17:38 parse2 gnome-shell[4026701]: message repeated 34072
times: [ JS ERROR: TypeError: null has no
properties#012_onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9]
Nov 4 10:51:50 parse2 gnome-shell[11582]:
[11584:11584:1104/105150.374036:ERROR:CONSOLE(1)] "[Shields]: Can't request
shields panel data. Error: No tab url specified", source:
chrome-extension://mnojpmjdmbbfme
jpflffifhffcmidifd/out/brave_extension_background.bundle.js (1)
Yet More Info:
While it was running slow, I did a gcore, and it showed a single active thread
(90% CPU) in the garbage collector. That may have nothing to do with this, but
who knows...
gnome-shell: 3.36.4
Ubuntu 20.04
Hardware: 64g memory, 1Tb NVME drive, Asus ROG Strix GeForce RTX 2060, 4
Monitors
Cores: 16 Threads: 32 AMD Ryzen 3950X
browser1 = brave tabs = 67
browser2 = firefox tabs= 64
various other windows Quake, rocketchat, Thunderbird, MATE terminal
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https://bugs.launchpad.net/bugs/1880405
Title:
High CPU and journal flooded with: JS ERROR: TypeError: null has no
properties
_onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9
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