I don't see any changes to this part of the installer *at all* - not just no relevant changes, cdrom-detect.postinst and the Linux variant of list-devices literally haven't changed at all. Maybe a udev or kernel change?
list-devices is probably the easiest place to start debugging; I expect you'll find that on 11.10 the virtual CD is showing up in /sys/block/ and has an ID_CDROM= entry in its 'udevadm info -q env' output, while on precise either it's missing from /sys/block/ (perhaps kernel bug, perhaps some necessary module not being properly delivered to the installer) or it doesn't have an ID_CDROM= entry (probably a udev bug). It'd be helpful to narrow this down. ** Changed in: debian-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/982430 Title: Regression: Error - Ubuntu-server 12.04 installation as VM on xen- server 6 (use of local iso file) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/982430/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs