I have had a sleep bug since the stable update on the 22nd August. My system gets stuck and resumes when trying to sleep sometimes. It means i often closed the lid of my computer and find its still running when i get up in the morning.
I need to use some of the kernel diagnostics but i have not been able to figure how, or get the advice on how to do it.
It says to add kernel options like initcall_debug &/or ignore_loglevel to the kernel boot options.
I have added one of these options to /etc/sysctl.d/99-sysctl.conf but i dont think it works, I can see an error in the logs after reboot that says.
06/09/2020 00:59 systemd[1] Failed to start Apply Kernel Variables.
So:-
How/where do i add these kernel options?
How do i test that they are working after i add them somewhere?
Now i just need to figure how to search for relevant info after the next time the sleep cycle gets “jammed” and just resumes itself. What software or driver is causing the problem. I assume its a dmesg | grep or maybe journalctl im not sure but i am at least a little further on. Thank you.