It appears that your hard disk simply stopped responding during the install, and that it was a qemu disk. What is your host system? It looks like qemu broke.
Jun 7 20:44:34 ubuntu kernel: [ 1678.198766] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen Jun 7 20:44:34 ubuntu kernel: [ 1678.198770] ata1.00: failed command: FLUSH CACHE EXT Jun 7 20:44:34 ubuntu kernel: [ 1678.198774] ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 Jun 7 20:44:34 ubuntu kernel: [ 1678.198774] res 40/00:00:00:4f:c2/00:00:00:00:00/a0 Emask 0x4 (timeout) Jun 7 20:44:34 ubuntu kernel: [ 1678.198776] ata1.00: status: { DRDY } Jun 7 20:44:39 ubuntu kernel: [ 1683.238632] ata1: link is slow to respond, please be patient (ready=0) Jun 7 20:44:44 ubuntu kernel: [ 1688.218497] ata1: device not ready (errno=-16), forcing hardreset ** Changed in: ubiquity (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1775705 Title: ubiquity crashed due to input/output error (disk/file system is ok !!) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1775705/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs