To add some more observations: After running umount in the context of an "at" job, the issue nearly disappeared completely. Before this change, i already suspected power saving mechanisms to increase the probability of a freeze. Last week i had a freeze again, as the lid of my laptop has been closed during the backup. Turning the display off via DPMS appears to have a similar effect.
Maybe the "at" assumption has been wrong and the issue is more related to the graphics subystem. It would, at least to a certain degree, explain why i never was able to reproduce it by running the script manually. At the other hand, i remember cases in which i had been working and at the end of the backup, the system stopped responding. This might be a red herring again ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1115753 Title: Umount of Multiple LVM Snapshots Causes 'soft lockup CPU#0 stuck for' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1115753/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
