Background running apps could be the cause for the high CPU usage and system unresponsiveness. Learn how to control hidden background apps in Linux.
$ uname -a Linux pop-os 5.17.5-76051705-generic #202204271406~1651504840~22.04~63e51bd SMP PREEMPT Mon May 2 15: x86_64 x86_64 x86_64 GNU/Linux $ ldd --version ldd (Ubuntu GLIBC 2.35-0ubuntu3) 2.35 $ ...
If you have the python 'serial' module, you can just place grabserial in a directory on your path, or add the directory containing grabserial to your path, or just ...