I reconfirm this bug in Kubuntu Gutsy kernel version 2.6.22-15 and add an additional data point:
If I boot without the kernel option irqpoll, these error messages don't appear in the kernel log. However, after a while, the CDROM drive stops responding anyway, and the USB system dies for some reason.
So I have to boot with the kernel option irqpoll, which causes these messages to appear. If I execute sudo hdparm -w -d 0 /dev/hda, then these messages temporarily stop and I can use the CDROM drive for a brief period of time.
uname -a:
Linux kpas1 2.6.22-15-generic #1 SMP Fri Jul 11 18:56:36 UTC 2008 x86_64 GNU/Linux
I reconfirm this bug in Kubuntu Gutsy kernel version 2.6.22-15 and add an additional data point:
If I boot without the kernel option irqpoll, these error messages don't appear in the kernel log. However, after a while, the CDROM drive stops responding anyway, and the USB system dies for some reason.
So I have to boot with the kernel option irqpoll, which causes these messages to appear. If I execute sudo hdparm -w -d 0 /dev/hda, then these messages temporarily stop and I can use the CDROM drive for a brief period of time.
uname -a:
Linux kpas1 2.6.22-15-generic #1 SMP Fri Jul 11 18:56:36 UTC 2008 x86_64 GNU/Linux