I've made twenty coasters so far trying to burn Ubuntu 8.10 for a friend.
I've tried K3B, Brasero, Nero Linux (trial), and cdrecord from the command line. I've tried replacing wodim (fake cdrecord) with real cdrecord. I've tried two different types of CD-Rs
All the burns go the same way - they all burn fine, but all fail on verify. Some get further than others.
This is Kubuntu 8.10, with today's kernel update and with the previous kernel. My CD-drive is /dev/scd0 or I guess alternately /dev/sr0. I've never manually set it.
This is a laptop with a slimline-style CD/DVD burner. I've never had problems under windows burning exactly the same ISOs.
It seems like this may be a known problem, but all the workarounds I've seen don't work. Any guesses?
EDIT: Just to be clear, the md5sums on the ISOs work out alright. I also downloaded them through bittorrent, so it's not the ISO's problem but strictly a burning issue.
EDIT2: May be unrelated, but K3B is using a lot of the CPU. I'm burning a disk right now, and the interface is very sluggish/catch-up. It's also having trouble keeping both (device and software) buffers full. never had that problem on windows. DMA perhaps?