intrepid alpha3: xserver fails to start, keyboard and mous does not function,

[ehcpdeveloper]

Binary package hint: xserver-xorg-core

I use Ubuntu desktop 8.10 intrepid alpha3 on my ibm lenovo desktop.
Today (3008, August, 05) i upgraded my ubuntu with aptitude upgrade,
rebooted, my xwindow come-up, with screen "ubuntu is running in low graphics mode", but keyboard and mouse does not function. Previously, i was able to continue by clicking "continue" button. Now, keyb-mouse does not work normal way, for example, i cannot click continue by keyb.
.. i can switch to console by ctrl-alt-f1

the last package that i installed: xserver-xorg-core_2%3a1.4.99.906-1ubuntu1_i386.deb

so, in console, i switched back to previous version,
xserver-xorg-core_2%3a1.4.99.905-0ubuntu5_i386.deb
now, i can use keyb-mouse, i can login...
my kernel is: 2.6.26-5-generic

For me, it is difficult to give-out more information about xserver-xorg-core package that caused the malfunction, since i replaced it with a previous version, and i need to use my computer, i opened this bug for your info.... i wrote these from another computer,

hope you success in ubuntu..