Woke up this morning to try the results of last night's last kernel recompile. I wasn't able to get zaptel running, and have been noticing that the system clock is going wildly out of sync (despite ntpd running), so I turned off the preemptive kernel switch. Oops. Every loadable kernel module became non-functional. Rebuilding the whole kernel and all modules didn't help. Eventually had to re-enable the preemptive kernel to get a working desktop, but that leaves me without ztdummy, and still without a working mythtv.

Probably have to rebuild from original sources to avoid the preemptive problems. Oh well, other than the conference demo the system's working. Deal with the problems some other time.