That seems to have fixed it! I've run the test script six or seven times on both kernels, with nary a hiccup (aside from the "error -19" messages with the 4.13 kernel). Below is the reported kernel information from both your builds, just to be sure I booted the correct kernels.
$ uname -a Linux oil-boldore 4.13.0-25-generic #29~lp1733662PatchFromUpstream SMP Wed Jan 17 20:13:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ uname -a Linux oil-boldore 4.15.0-041500rc8-generic #201801172011 SMP Wed Jan 17 20:13:51 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1733662 Title: System hang with Linux kernel due to mainline commit 24247aeeabe To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1733662/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
