Can those with more experience please contribute wisdom about kernel changing?
A recent system upgrade (apt-get upgrade) upgraded 106 packages. It included ubuntu 8.04.2 (was 8.04.1) and a new init image, /boot/initrd.img-2.6.24-19-generic (was same name).
The upgrade broke reading files from DVD (the backup script runs cksum on the backup files on DVD). Reading files from DVD has long been troublesome; essentially the problem is as reported at launchpad bug 228624
although the problem has been intermittent and symptoms have varied. The "all_generic_ide=1" workaround described there had given blessed relief from failed DVD reads for a couple of months until the recent upgrade.
So -- how to fix reading files from DVD? This is where my ignorance comes in and wisdom would be helpful both with the techniques and in weighing the pros and cons.
One option is to back out the recent package upgrades. Speculation puts the problem in the area of DVD file system mounting/automounting, UDMA, IDE/PATA/SATA. How about guessing the problem is kernel related and backing out the latest kernel change? How to do that? How to find documentation on doing that? Better/possible to back out all 106 changes and re-apply progressively? How to do that?
Another option given at launchpad bug 228624
is to change to the 2.6.27 kernel. A 2.6.27 kernel prepared for Hardy was used in Intrepid Alphas. How to find? How to try/backout? How to find documentation on doing that? This would be contrary to the philosophy of using a mature LTS version for stability? What is "stability" worth if the backups don't run reliably?!
Anything else to consider while managing (ha!) this problem?