You might check that with nomodeset whether resume really hung or the display just didn't come on. I.e. ping the device on the network, or install an ssh server and try to log in.
Here's the link I forgot to include earlier for the systemtap debugging. Since it doesn't look like you have any other way to get output during these hangs, this is probably the next thing to try. https://wiki.canonical.com/PlatformServices/HardwareEnablement/Documentation/PowerManagement/DebugTools -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/797922 Title: kernel hangs in pm-hibernate on saving to disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/797922/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
