If your system contains certain sound cards (Dell Inspiron
3500 ) you can end up with a locked system that can only be
edited from a rescue mode.
The problem is that sndconfig edits /etc/conf.modules before
it tests if your system has a working sound card. On
installing module it can crash the system. If you reboot you
cannot get around the modules being loaded even if you do
a linux single because of /etc/conf.modules syntax.
a) have sndconfig test modules via explicit insmod commands
and at end of run write /etc/conf.modules
b) have initscripts not load sound modules in single user
FWIW, sndconfig does tell you it's writing a new
Boot with "linux nomodules"; alternatively "linux init=/bin/bash".
*** This bug has been marked as a duplicate of 5429 ***