It looks like there was an error reading and writing to your partition /dev/sda1:
Apr 9 23:57:00 ubuntu kernel: [ 441.076810] EXT4-fs error (device sda1): ext4_mb_generate_buddy:757: group 1729, block bitmap and bg descriptor inconsistent: 2644 vs 2628 free clusters Apr 9 23:57:00 ubuntu kernel: [ 441.076821] Aborting journal on device sda1-8. Apr 9 23:57:00 ubuntu kernel: [ 441.077377] EXT4-fs (sda1): Remounting filesystem read-only Earlier in the log we can see: Apr 9 23:51:57 ubuntu kernel: [ 138.502134] EXT4-fs (sda1): warning: mounting fs with errors, running e2fsck is recommended Apr 9 23:51:57 ubuntu kernel: [ 138.504604] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) Apr 9 23:52:10 ubuntu ubiquity[2386]: debconffilter_done: ubi-partman (current: ubi-partman) I'd recommend running e2fsck on that partition and trying the install again. ** Changed in: ubiquity (Ubuntu) Status: New => Incomplete ** Changed in: ubiquity (Ubuntu) Importance: High => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1442434 Title: installer crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1442434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs