Also your Xorg log shows the monitor is being repeatedly reconnected a
few times per second:
[ 8306.094] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): connected
[ 8306.094] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): Internal TMDS
[ 8306.094] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): 600.0 MHz
maximum pixel clock
[ 8306.094] (--) NVIDIA(GPU-0):
[ 8306.686] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): connected
[ 8306.686] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): Internal TMDS
[ 8306.686] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): 600.0 MHz
maximum pixel clock
[ 8306.686] (--) NVIDIA(GPU-0):
[ 8306.775] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): connected
[ 8306.775] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): Internal TMDS
[ 8306.775] (--) NVIDIA(GPU-0): Tech Concepts 55S425 (DFP-1): 600.0 MHz
maximum pixel clock
In case this is due to a bad connection, please unplug and replug the
monitor. Please also try a different cable. It sounds like it's the TCL
TV connection.
** Changed in: nvidia-graphics-drivers-440 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1868009
Title:
Xorg high CPU usage and stuttering with the Nvidia driver
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