I had same problemnwith my cdrom not reading on 8,04. 7.190 worked but 8,04
would not. I changed my cdrom and it fixed for me. for some reason yours is not
reading the cdrom. Have you changed your IDE cable? If its bad it want read
cdrom properly.

Don't know what your problem could be. Though I might be able to help
you. I have a few 8.04 disks I'm trying to get rid of. If you want to
give me a general delivery address to pick it up at your local post
office I wouldn't mind sending you one.

Are you burning the disk as an ISO file ..?
If all else fails send request for disk yo ubuntu only takes a week or so.

If all else fails send request for disk yo ubuntu only takes a week
or so.

Responding to the other posts, I changed the cable - no luck. Changed
to another cd drive, nothing. But I did figure out that apparently I
cant write at max speed. I dropped it two notches and it worked fine.
Not sure why but, it worked.

Yes, I know this sounds counter to whatever one wants to believe these
days. I can't believe I didn't come up with it, but any time CD writing
is giving you an error, use a slower setting and it will usually be fine.

I don't want to ask the obvious, but:

1. Are you sure you're burning a CD iso to a CD or DVD-iso to a DVD?

2. Are you using re-writable disks? I had bought a pack of CD-RW
because it was recommended for back-ups, being able to re-use them.
But I couldn't get them to burn right in any machine I own. Don't
know if it was the weird 12x speed that never seemed to be an option
in the software, but I ended up throwing out the whole lot.

Its the cd iso.
I tried both rw and r disks.

Im writing higher than 12x but slower than my max speed.

But Im up and running now so, its all good

It could be the ISO itself.....................

Could be burning CD's too fast, try 1x and waiting, could work.

Also, could be a bad data cable, if you've got a known good spare, swap them
out.