I linked X386mono to X, and Xconfig.mono to Xconfig.  X Windows
    starts, complains about not finding a certain signal, then fills my
    screen with vertical bars and completely hangs the system -- even
    [Cntrl]-[Alt]-[Del], [Cntrl]-[Alt]-[BS] etc. do nothing, and the
    update daemon doesn't spin the drive.  As a result, I cannot redirect
    output to a file, because the file will never be written to disk
    before the system hangs and has to be powered down.

Ok, I had the same problem (as did someone else who asked this same
question sometime in the last two weeks.)  The problem comes from having
the wrong device specified in your Xconfig.  (I had /dev/ttys2 rather
then /dev/ttys0.)

I don't really understand why having the wrong device specified should
cause the whole system to lock up.  I spent some time trying to trap any
error output prior to the system freezing.  The only thing I saw was
that xinit dies due to a signal 10.  Is this scenario a known
problem/bug?  Does someone want to add this problem/solution to an
appropriate README/INSTALL/FAQ file.

Lou Berger

(BBN - Not my employer, just my mail address.)