On closer examination the suspend issue that I was seeing was not related to the 1.2.6-0ubuntu0.16.04.1 networkmanager upgrade but a bios upgrade I performed a few days earlier. The forced reboot only occurred when suspending while powered and resuming on battery after unplugging the laptop, which is why I hadn't noticed earlier. After downgrading the bios and reinstalling the networkmanager update everything is working fine now.
Apologies for the false alarm. For anyone interested, the system is an XPS 9350 and the offending bios upgrade was 1.4.13 (reverting back to 1.4.12 fixed the issue). ** Tags removed: verification-failed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1645698 Title: [SRU] Upgrade network-manager to latest point release To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1645698/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
