I could immediately reproduce with the mini image. The Disco mini image [0] works fine.
[0] http://ports.ubuntu.com/ubuntu-ports/dists/disco/main/installer- ppc64el/current/images/netboot/mini.iso -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1845572 Title: udevadm trigger will fail when trying to add /sys/devices/vio/ Status in linux package in Ubuntu: In Progress Bug description: [Impact] This will cause the installer to exit early, causing a kernel panic before any prompt to the user. This is restricted to some Power systems. [Test case] A build vmlinux was used to boot the installer, and a prompt was available. 'add' was written to /sys/devices/vio/uevent was written to, and no error was found. 'add' was written to /sys/devices/vio/*/uevent, and modalias information was found when 'udevadm monitor -p' was run in the background. [Regression potential] Events may be missing and coldplug/hotplug of vio devices may fail. That was tested in the test case and not found to be the case. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1845572/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp