Thank you for taking the time to report this bug and helping to make Ubuntu better.
This is a support comment & suggestion only. Is there a reason you didn't use the latest 18.04.3 which uses the HWE stack and thus has later kernel, modules & X support. If you didn't want the hardware enablement stack to be used, fair enough. I didn't see a glaring issue on why you got your errors Dec 3 20:07:28 ubuntu ureadahead[1063]: ureadahead:/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache: Error retrieving chunk extents: Operation not supported Dec 3 20:07:28 ubuntu ureadahead[1063]: ureadahead:/usr/lib/ibus/ibus-engine-simple: Error retrieving chunk extents: Operation not supported .. Dec 3 20:07:28 ubuntu ureadahead[1063]: ureadahead:/etc/sane.d/epsonds.conf: Error retrieving chunk extents: Operation not supported Dec 3 20:07:28 ubuntu ureadahead[1063]: ureadahead:/usr/bin/unsquashfs: Error retrieving chunk extents: Operation not supported but in your case I'd try the later Ubuntu 18.04.3 LTS which uses HWE (https://wiki.ubuntu.com/Kernel/LTSEnablementStack) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1855004 Title: Grub install failed and installer crashed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1855004/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
