Sorry for the long delay. Meanwhile I've upgraded the installed system to wily. It still has a few issues with network connections, but nothing like this bug.
Please find attached the screenshot after disabling thermald. The process is as usual: - Boot from stick (no changes to kernel options) & wait for language selection - ctrl-alt-F1 to console & type given command - ctrl-alt-F7 to X & click "try kubuntu" & immediately switch back ctrl-alt-F1 - wait half a minute and see soft lockups - enable trace by alt-sysreq-t - take the picture As you suspected a thermal problem, I took the notebook outside in the cold winter air: I've booted 15 to 20 times and could not produce a single lockup. ** Attachment added: "Screenshot after stopping thermald" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509839/+attachment/4553340/+files/tmp_6658-IMG_20160120_1424071627415619.jpg ** Changed in: linux (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509839 Title: segfault on start of live session in kactivitymanager / libqt5sql To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509839/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
