Thank-you Sam and Rick.
For the next 2 questions, I'm not looking for numerical answers. Qualitative
probability terms on a scale going from "highly improbably" to "almost
certainly" would be great.
The clock (and the CMOS battery) got some attention while trying to fix the boot problem.
I have not yet replaced the battery, but I'm not seeing any problems. What is the
likelihood that the battery or the clock caused the boot failure?
The boot failure occurred right after doing my weekly "dnf upgrade". What is
the likelihood that the "dnf upgrade" (or one of the patches installed by it)
caused the problem?
thanks,
Bill.