i can confirm that the kernel 3.0.0-19.32 in proposed fixes the issue, and allows the computer to start without any kernel parameter tweaks. thank you all
** Tags removed: verification-needed-oneiric ** Tags added: verification-done-oneiric -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/883441 Title: Kernel 3.0 (11.10 default kernel) won't boot unless acpi=off, worked fine with the default kernels of the 3 previous releases To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/883441/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs