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

[geo]

History:

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.

The only difference this time? Now I have "Normal releases" enabled in the Update manager - as opposed to previously where I only had "Long Term support releases".

Now this dumb black screen issue has come up under this installation of 8.04 using "Normal releases". I don't know why.

When it does occur (daily), I hit Ctrl+Alt+F1 and login to the text DOS looking screen. The message on the screen says "No resume image", whatever that means. I cannot get the display manager to run. When I type StartX it comes back saying:

"Fatal Server error: Server is already active for display 0
If the server is no longer running, remove /tmp/XO.lock and start again

Invalid MIT-MAGIC-COOKIE-1 keygiving up

xinit: Resource temporarily unavailable (errno 11): unable to connect to X server.
xinit: No such process (errno 3): server error"

What's going on? How do I solve this so it logs back into the normal desktop screen?

Do I have to wipe the drive and reinstall 8.04 again? (I really hate doing that, such a waste of my time).

PS: At command line I figured out that I can reboot the machine by typing sudo reboot, then entering my password. Rebooting ALWAYS solves this problem, but it shouldn't be necessary!

Thanks.



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