I can also verify that I have no sound with -24 & reverting to -22.1 I have sound again. The downgrade was "messy" due to bootlogd. Looking at -24, I see that many things are changed in mount location. I also note that during a verbose boot I get modprobe information with -22.1 & don't get the same info with -24. Could it be that devices that need to be probed are not being mounted/probed/made available to the system?
(Edited with more information & clarified) -- Cheers!!! Dean Loros Performance by Design Ltd. autocrosser at http://forums.linuxmint.com