This post describes the solution to a hibernation issue I had with Lenovo Thinkpad L412 laptop running Windows 7.
When waking up from hibernation the system resumed relatively fast, but then, for a minute or two after resuming, many applications (e.g. Explorer, Firefox) would be "not responding".
- During this period the disk activity was unexpectedly high, Resource Monitor indicated that most of it was paging (see the high "Hard faults" figure, and the c:\pagefile.sys requests on the screenshot), even though there was more than enough RAM available before hibernating.
- The task manager also showed a drop in memory utilization -- the system used fewer memory after hibernating and resuming than before.
The program to blame for this behavior turned out to be this fine piece of software engineering:
Just uninstall it and the problem is gone. You'll lose the large battery widget in the task bar and the confusing power management UI that mostly duplicates existing Windows functionality:
(If anyone wonders. the latest version at the time of writing (6.32) had this problem too.)
Troubleshooting tips that helped to identify the issue can be found here: Trace Windows 7 boot/shutdown/hibernate/standby/resume issues.