only low resolution allowed and the mouse pointer not appear

[abePdIta]

Binary package hint: xorg

I apologize for my poor English.

I upgraded from 8.10 to 9.04, the graphical environment is displayed at 640x480 resolution and you can not use a higher resolution.
I tried with some methods already used before, but without success.
In addition, after the update, the mouse pointer is no longer visible: the mouse works properly, it moves and reacts to clicks, icons and buttons are illuminated and highlighted during rollover, but the pointer on the screen is completely invisible.
Both problems occur even if the computer is started with the installation CD in "live" mode.
Thank you in advance, abe.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: xorg 1:7.4~5ubuntu18
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-11-generic (buildd@palmer) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009
SourcePackage: xorg
Uname: Linux 2.6.28-11-generic i686