Similar ERROR in /var/log/syslog for me on Ubuntu 20.10 with gnome-shell
3.38.1-1ubuntu1.1. Similar to comment #9 I have firefox with many tabs
and dissenter (brave fork) with many tabs open.
Jan 4 06:43:29 desktop01 gnome-shell[2096000]: JS ERROR: TypeError:
null has no
properties#012_onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9
Jan 4 06:43:30 desktop01 gnome-shell[2096000]: message repeated 35862
times: [ JS ERROR: TypeError: null has no
properties#012_onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9]
Jan 4 06:43:30 desktop01 gnome-shell[2096000]: 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
➜ ~ inxi -SMCG
System: Host: desktop01 Kernel: 5.8.0-33-generic x86_64 bits: 64 Desktop:
N/A Distro: Ubuntu 20.10 (Groovy Gorilla)
Machine: Type: Desktop System: ASUS product: All Series v: N/A serial:
<superuser/root required>
Mobo: ASUSTeK model: X99-A v: Rev 1.xx serial: <superuser/root
required> UEFI: American Megatrends v: 4101
date: 07/10/2019
CPU: Info: 6-Core model: Intel Core i7-5820K bits: 64 type: MT MCP L2
cache: 15.0 MiB
Speed: 1765 MHz min/max: 1200/3600 MHz Core speeds (MHz): 1: 1626 2:
1243 3: 1387 4: 1291 5: 1379 6: 1316 7: 1329
8: 1300 9: 1288 10: 1247 11: 1356 12: 1282
Graphics: Device-1: NVIDIA GK208B [GeForce GT 710] driver: nvidia v: 455.38
Display: x11 server: X.Org 1.20.9 driver: nvidia unloaded:
fbdev,modesetting,nouveau,vesa resolution:
1: 2560x1080~60Hz 2: 1680x1050~60Hz
OpenGL: renderer: GeForce GT 710/PCIe/SSE2 v: 4.6.0 NVIDIA 455.38
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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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