Dan Drake wrote:
> I'm running Ubuntu and for some time now, I've had a big problem with it
> locking up. The machine simply won't run for more than 8-10 hours
> without locking up.[...]
> Here's some specs:
> 
>   MSI KM3M-V motherboard
>   Sempron 1.75GHz cpu
>   2 512MB sticks of Crucial RAM

I agree with the others that it sounds like a hardware problem.

Realize that Edgy is not quite released [1] and might have certain
stability issues (as last minute bugs are worked out).

If you do not have the kernel specifically built for your
chip you may want to install the meta package for the kernel [2]
or kernel + restricted drivers [3] for the Sempron.

HTH,

--Tom

[1] https://wiki.ubuntu.com/EdgyReleaseSchedule
[2] http://packages.ubuntu.com/dapper/base/linux-image-k7
[3] http://packages.ubuntu.com/dapper/base/linux-k7