Okay so here goes. I finally gave up trying to up2date or yum arjan's 2.6.0-test kernels. I downloaded the RPMs from http://people.redhat.com/arjanv/2.5/RPMS.kernel/ and RPM happily installed. One thing I noticed was that the version numbers and dates on his updated modutils, kernel-utils and so on were lower than the ones in FC1. Does this mean that his updates are already in FC1? Or should I downgrade back to the older versions? Anyway - So I get 2.6.0-test9 installed from the RPM. Sound doesn't work anymore. Specifically, the new kernel doesn't auto-load the modules for my sound card (according to lspci: "ALi Corporation M5451 PCI AC-Link Controller Audio Device", which under 2.4.X uses the "trident" module, and AFAIK uses "snd-trindent" under 2.6.X). I've already gone through and created an appropriate /etc/modprobe.conf, etc. The relevant lines from that: alias sound-slot-0 snd-trident alias sound-card-0 snd-trident alias sound-service-0-0 snd-mixer-oss alias sound-service-0-1 snd-seq-oss alias sound-service-0-3 snd-pcm-oss alias sound-service-0-8 snd-seq-oss alias sound-service-0-12 snd-pcm-oss Now though, even when I reboot back into 2.4.22 (the stock FC1 kernel) the sound modules don't load. Any ideas why they don't load automatically? And any ideas why it's stuffed up my 2.4.22 as well (they're two kernels booting into the same FC1 installation). -Dan