Comment 2 for bug 901928

if it helps someone, to restore X if egmd fails, do the following:

1) comment (rename /etc/apt/sources.list.d/gma500-emgd-1_8-natty.list to "~gma500-emgd-1_8-natty.list") or delete the file (because this includes other versions of the files you may already have)
2) # apt-get update
3) # apt-get purge xorg* xserver* emgd*
4) # apt-get autoremove (for deleting all extra/related files.. I don't know if really necessary)
5) # apt-get install xorg
6) reboot (might be not necessary)

note: ensure you don't have anymore /usr/share/X11/xorg.conf.d/10-emgd.conf
if it's still there, delete it (you can easily restore it reinstalling emgd).

I'm using fluxbox and could revive X again doing this.