Public bug reported:

I use two monitors.
I noticed that every time I use Zoom, Ubuntu frezzes completely, at least the 
desktop. Other zoom participants inform me that they can hear me and see me but 
my system is not responsive no matter how long I leave it run.

I use : 
Ubuntu 18.04.4 LTS
5.3.0-45-generic #37~18.04.1-Ubuntu SMP Fri Mar 27 15:58:10 UTC 2020 x86_64 
x86_64 x86_64 GNU/Linux

I believe that the error is due to what is displayed in :

Απρ 07 20:37:57 igor-MS-7A72 org.gnome.Shell.desktop[1994]: #5 0x55ac1bdb07c0 i 
  resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7fb5040d2cd0 @ 10)
Απρ 07 20:37:57 igor-MS-7A72 org.gnome.Shell.desktop[1994]: #6 0x7ffdb79d9a50 I 
  resource:///org/gnome/gjs/modules/signals.js:128 (0x7fb5040d2230 @ 386)
Απρ 07 20:37:57 igor-MS-7A72 org.gnome.Shell.desktop[1994]: #7 0x55ac1bdb0730 i 
  resource:///org/gnome/shell/ui/tweener.js:244 (0x7fb5040cf808 @ 159)
Απρ 07 20:37:57 igor-MS-7A72 org.gnome.Shell.desktop[1994]: #8 0x7ffdb79da630 I 
  resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7fb5040b5de0 @ 71)
Απρ 07 20:37:57 igor-MS-7A72 org.gnome.Shell.desktop[1994]: #9 0x55ac1bdb06b0 i 
  resource:///org/gnome/shell/ui/tweener.js:219 (0x7fb5040cf780 @ 15)
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: TRAP ch 15 
[007f3bf000 Xorg[1859]]
Απρ 07 20:38:33 igor-MS-7A72 kernel: nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 
80000009

Any hint?

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Output of journalctl -b -1"
   
https://bugs.launchpad.net/bugs/1871477/+attachment/5348984/+files/journal.txt

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https://bugs.launchpad.net/bugs/1871477

Title:
  Ubuntu 18.04 freezes when using Zoom

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