Hello, I did some further research and recognized this as an ancient issue. Partman fails under certain conditions - for example unordered partition numbers. Thus, I've removed the extended partition with it's logical drives and recreated the partitions with installer / partman instead of using gparted. Before, I've created the last logical drive first, this time the logical drives were created starting at the beginning of the extended partition.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1028436 Title: no partitions seen in installer dialog, gparted shows partitions correctly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1028436/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs