Control: reassign -1 slim
Control: retitle -1 slim receives SIGTERM after period of inactivity

Bob,

We have managed to reproduce this and believe it is a problem with
slim. Hopefully rrq can debug further.

You might try changing to another display manager. Either xdm or wdm might be a
good choice for an older system. If that works around the issue for you, perhaps
you could confirm and it will at least make us certain we have identified the
right component.

Thanks

Mark