Attached is a patch for this issue. I am noting that this patch is necessary when running in uefi mode to install shim-signed / grub-efi- amd64-signed / etc.
** Attachment added: "modified 50mounted-tests" https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1819363/+attachment/5245396/+files/50mounted-tests -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1819363 Title: uefi: os-prober doesn't skip cdrom iso9660 type To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1819363/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs