Andy, A few people tested out your RTAI debs and ran into issues such as the infamous "CANNOT FIND MAILBOX" error. I was able to figure out the root source of the issue; your rtai-modules package does not match the 5.4.258 kernel you built.
I re-built the rtai-modules package for 5.4.258 which fixes the issue, then Bari re-built the LinuxCNC package against it. I then made new kernel (5.4.279) debs and a matching rtai-modules package, then Bari made new LinuxCNC Debian packages again. The 5.4.258 LinuxCNC package has those .mod files you talked about, deleted from the tree, so in the 5.4.279 release I made sure those files were back in. Upgrading from 5.4.258 to 5.4.279 should have no regressions, rather in fact bug fixes only, however one person on the forums (Mecanix) said that the modules didn't want to unload on his system and required a full reboot, along with latency spikes. I'd like to fix that and see what's going on, but overall the 5.4.279 packages should be more stable. Alec _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers