I sent this earlier, but it doesn't look like it made it. Sorry if it is a repeat. The modutils-2.1.121-3 package included for use with the 2.2.1 kernel is broken. (in the /apps/kernel2.2 directory on the Mandrake 5.3 CD-ROM image; an optional install for those compiling and running the 2.2.1 kernel). This doesn't concern anyone who is running the default 2.0.36 kernel. I fixed the problems w/ depmod, modprobe, etc. (getting the "undefined symbol: __bzero" messages when using mod utilities) by downgrading (going back to modutils-2.1.85 works, or get modutils-2.1.121-2, modutils-insmod_static-2.1.121-2, and modutils-man-gz.2.1.121-2 from one of the RedHat Contrib mirrors. ie, they are in (among others): ftp://ftp.wtfo.com/pub/linux/redhat/contrib.redhat.com/libc6/i386/ ftp://ftp.cc.gatech.edu/pub/Linux/distributions/redhat/contrib/libc6/i386/ See http://www.redhat.com/mirrors.html for other Contrib mirrors. Download these files, put them in a directory, and "upgrade" to them with: rpm -Uvh --force modutils-*2.1.121-2*.rpm Later, if a fixed 2.1.121-3 or later comes out, upgrade to it with the force option, and remove modutils-insmod_static-2.1.121-2 package by hand (since it probably won't be removed by an upgrade). Force the upgrade again afterwards, just to make sure. This fixed the problem for me; I don't know what the problem w/ modutils-2.1.121-3 is. Chad Netzer