After more researching and testing, I've determined that the bug is caused by the Intel Rapid Start technology in BIOS. It had a timer of 3 hours after laptop sleeps. I disabled that in BIOS and resume from suspend started working just fine. I don't know if this is a Ubuntu bug or a BIOS bug.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1449357 Title: Thinkpad T450s unable to resume after suspended for a long time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1449357/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
