Comment 6 for bug 152391

This bug has been already reported as bug #61711. The slow computer startup in Gutsy is caused by the fact that ubiquity often install a /etc/usplash.conf file that contains wrong values ( bug #150930 ) and by the fact that usplash seems to have a lot of trouble while booting the system in that situation.

Generally, you can fix this problem by changing the values in /etc/usplash.conf to :

xres=1024
yres=768

and after this, run sudo update-initramfs -u

Björn : Assuming that the black screen just appears before GDM appears and that the desktop is just freeze for some seconds after booting, I would say that it's normal. However, if this situation is the cause of problems or really seems not normal, I suggest that you open a bug report for that specific case.