$ uname -a Linux osprey 6.1.15-200.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Mar 3 17:29:44 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Looks like I have a chattering keyboard. Idle terminal looks like someone's repeatedly hitting <ENTER>. Ditto on virtual terminal. keystrokes being duplicated in graphical apps like Thunderbird. Pace of the extra stuff seems random. Sometimes it goes 20-30 seconds; others, just a few seconds.
Don't see any journalctl ofutput of interest. Other than going out to find a new keyboard, other suggestions welcome. Thanks............