Different Video option ideas

[Linda]

I have an old Toshiba A56 Satellite laptop computer. It was 
freezing in Windows  and driving the employee nuts. I 
installed 8.04 LTS on it and it never froze up in the year 
and a half it was running 8.04 LTS. I have now upgraded it 
to 10.04 LTS. To get video to work I use the i915.modeset=1 
xforcevesa however now if the user logs off and the computer 
sits idle for an extended period of time it will freeze. I 
can not find the specs for the computer anywhere but the A55 
has Intel Extreme Graphics so maybe it is the same. Does 
anyone have suggestions for a different video setting to try 
that might work better? For now I have just told the user to 
shutdown rather than log off as a work around, since so far 
it only freezes on the login screen.
                                                       Thanks
                                                        Linda