uml and uClibc root_fs problems

I'm trying to use user-mode linux with the root_fs linked to on the main page
of www.uclibc.org (http://www.uclibc.org/downloads/root_fs-i386.bz2). After
unzipping it and renaming it to root_fs I run linux. Everything seems to go
fine until it stops at this line:

Starting PCMCIA services: module directory /lib/modules/2.4.19-5um/pcmcia not
found.

It goes no farther and my terminal is locked.

I'm running Mandrake 9.0 with the 2.4.19-16mdk kernel.

Here is the full output in case I missed something:

$ linux
tracing thread pid = 17705
Linux version 2.4.19-5um (jdike@xxxxxxxxxxxxxx) (gcc version 2.96 20000731
(Red Hat Linux 7.1 2.96-81)) #2 Mon Sep 16 15:41:15 EDT 2002
On node 0 totalpages: 8192
zone(0): 8192 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/ubd0
Calibrating delay loop... 1206.32 BogoMIPS
Memory: 30192k available
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
VFS: Diskquotas version dquot_6.4.0 initialized
Journalled Block Device driver loaded
devfs: v1.12a (20020514) Richard Gooch (rgooch@xxxxxxxxxxxxx)
devfs: boot_options: 0x1
Installing knfsd (copyright (C) 1996 okir@xxxxxxxxxxxx).
pty: 256 Unix98 ptys configured
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)
Universal TUN/TAP device driver 1.5 (C)1999-2002 Maxim Krasnyansky
SCSI subsystem driver Revision: 1.00
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 2048)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
Initializing software serial port version 1
mconsole (version 2) initialized on /home/jbodnar/.uml/gh3TvY/mconsole
Partition check:
 ubda: unknown partition table
UML Audio Relay
Initializing stdio console driver
VFS: Mounted root (ext2 filesystem) readonly.
Mounted devfs on /dev
EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended
Initializing random number generator... done.


--
Jason Bodnar
jason@xxxxxxxxxxxxx
http://www.shakabuku.org

"You want free speech? Let's see you acknowledge a man whose words make
your blood boil who is standing center stage advocating at the top of
his lungs that which you would spend a lifetime opposing at the top of
yours." -- President Andrew Shephard, "The American President"