Ubuntu 8.04, suddenly why does logging back in cause black screen?

[Lawrence Houston]

On Sun, 26 Apr 2009, geo wrote:

> Dell Optiplex GX260, 2 gig RAM, Pentium 4 2.5GHz, On-board Intel 82845 
> video chipset, 64 meg video RAM.
>
> I tried running 8.10 but had this problem where the screen would go 
> black when logging in, and 915resolution isn't supported! The epitome of 
> uselessness! So I went back - BACK - to 8.04 which had run well enough 
> previously.
>
> Do I have to wipe the drive and reinstall 8.04 again? (I really hate 
> doing that, such a waste of my time).

Here is a Link to my Posting on how to get an Optiplex 260's Intel 845G 
On-Board Graphics to allow Logins to proceed "Normally" under Ubuntu 8.10 
(that said Ubuntu 8.04 occasionally has problems with its Logins):

    https://lists.ubuntu.com/archives/ubuntu-ca/2009-March/005724.html

With some the above mentioned work arounds in place I just attempted a 
CD-ROM Based Upgrade from Ubuntu 8.10 to Ubuntu 9.04, which left my Intel 
845G's Graphics in such a "Jumbled" State that I did NOT have a "Usable" 
Login Screen (although Remote NX Sessions were "Fine")!!!  Which I then 
followed with a Clean Installation of Ubuntu 9.04, which at first was NOT 
"Usable" until I completed a dpkg "Check" and xorg "Repair" from Ubuntu 
9.04's "Rescue" Console...  After which Ubuntu 9.04 seems "Good" on my 
Optiplex 260 with its Intel 845G On-board Graphics, although that has only 
been since yesterday???

Intel 845G Graphic is mentioned as a "Known" Problem the Release Notes for 
both Ubuntu 8.10 and Ubuntu 9.04!!!

NOTE: After Ubuntu 9.04 was finally coaxed into "Behaving", I found it
       much faster than Ubuntu 8.04/8.10 had been on the same Optiplex
       GX260!!!

               Yes "Optiplex GX60" in my March Posting was a "Typo"...

Lawrence Houston  --  (ubuntu at greenfield.dyndns.org)