Public bug reported: On my Thinkpad T530 laptop, if I install and enable the watchdog service with the iTCO_wdt watchdog device, suspend stops working correctly. It always works correctly the first time, but if I try 2 or 3 times, it often locks up and fails to go into suspend on the second or third attempt. If I disable the watchdog service, suspend works perfectly no matter how many times I try.
I followed the instructions at https://wiki.ubuntu.com/DebuggingKernelSuspend and the result is "memory memory48: hash matches". ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: watchdog 5.14-3 [modified: lib/systemd/system/watchdog.service] ProcVersionSignature: Ubuntu 4.4.0-14.30-lowlatency 4.4.5 Uname: Linux 4.4.0-14-lowlatency x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CurrentDesktop: KDE Date: Sat Mar 19 10:30:19 2016 InstallationDate: Installed on 2014-06-01 (656 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1) SourcePackage: watchdog UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.watchdog.conf: 2015-09-05T09:54:44.925151 ** Affects: watchdog (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1559472 Title: Thinkpad T530 fails to suspend after 2-3 cycles when watchdog service is enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/watchdog/+bug/1559472/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
