Thanks @kaihengfeng for the bisection instructions and @jail-j for pointing me in the right direction. (It's probably worth mentioning that sudo make -j`nproc` deb-pkg was needed for the build to work)
Here's the most recent result: git bisect bad a192aa923b66a435aae56983c4912ee150bc9b32 is the first bad commit commit a192aa923b66a435aae56983c4912ee150bc9b32 Author: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Date: Mon Oct 16 03:29:55 2017 +0200 ACPI / LPSS: Consolidate runtime PM and system sleep handling Move the LPSS-specific code from acpi_lpss_runtime_suspend() and acpi_lpss_runtime_resume() into separate functions, acpi_lpss_suspend() and acpi_lpss_resume(), respectively, and make acpi_lpss_suspend_late() and acpi_lpss_resume_early() use them too in order to unify the runtime PM and system sleep handling in the LPSS driver. Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> Reviewed-by: Ulf Hansson <ulf.hans...@linaro.org> :040000 040000 b4ef369c698a10cec8d6224fdc3b8f287eb853b1 20327192ca09ecc0cf0b24b62fdb915ea303b988 M drivers wasn't sure if I'm meant to keep going so I've run sudo make -j`nproc` deb-pkg again to see what it comes up with. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774950 Title: Suspend fails in Ubuntu and Kubuntu 18.04 but works fine in Ubuntu and Kubuntu 17.10 (and on Kubuntu 18.04 using kernel 4.14.47) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774950/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs