Thanks you again for investigating this. It has been difficult to find similar cases because I do not really know how to describe the problem in English, making it difficult to use search engines.
I tried rdmsr -a 0x19a and it gives back 0 as seems to be normal. Here are the logs you suggested to make. I do not understand them all in depth, but the dstat log clearly indicates that on resuming, the swap contains 392 MB more data than before hibernating, and that this data is being put back into RAM. This is completely consistent with the symptoms. ** Attachment added: "freezeslow.dstat" https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1675683/+attachment/4867692/+files/freezeslow.dstat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1675683 Title: Computer sluggish/irresponsive for several minutes after hibernation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/1675683/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
