Ed Greshko wrote:
Looking at your Xorg.0.log I see this at the end.
[ 221.964] (II) AIGLX: Suspending AIGLX clients for VT switch [ 222.058] (II) systemd-logind: got pause for 13:65 [ 222.058] (II) systemd-logind: got pause for 13:69 [ 222.059] (II) systemd-logind: got pause for 13:64 [ 222.059] (II) systemd-logind: got pause for 226:0 [ 222.059] (II) systemd-logind: got pause for 13:66 [ 222.059] (II) systemd-logind: got pause for 13:67 [ 222.059] (II) systemd-logind: got pause for 13:68
You should check on your working system what you get. I don't have any of those types of pause messages.
I suppose you could try with selinux disabled as this appears to be a system-wide issue as opposed to a use configuration issue.
SElinux is disabled.
On the working system, the above messages are followed by
[ 72483.987] (II) AIGLX: Resuming AIGLX clients after VT switch
I'm not switching consoles. I haven't yet reached the opportunity to do so when the system hangs and the black screen appears. After that, yes, I can and do switch to a text console so I can kill the hung KDE session.
Searching for references to that AIGLX message, I find several reports, some going back a few years. The solutions are things like installing a different GUI so they aren't very helpful.
But it certainly does look like the systemd-logind pause is stuck and could be the cause of my problem.
Have I mentioned that I installed TigerVNC on the system, then connected from a different one? In that situation, KDE starts fine. The problem is only on the main screen.