I'm having the same issue. I'm pretty sure the startx stopped after I updated as well.
I followed the How to make BT persisent w/ USB w/ Encryption.
not sure if that has anything to do with it, but i'll add the info.
After installing BT5 to my hard-drive on my laptop, I'm trying to re-install the OS from a boot disc.
>>>startx #Isn't working for me either.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep 24 .....
(==) Using config directory: "/usr/lib/X11/xorg.conf.d
waiting for X server to shut down .error setting MTRR (base = 0xd00000000, size 0x100000000, type = 1) Inappropriate ioctl for device (25)
ddxSigGiveUp: Closing log