Comment 18 for bug 889278

Looked at this more today, My guess would be the 1 second delta_notice_timeout in gs-watcher-x11.c . For some reason this causes a function to loop until it locks the screen. I'm guessing that this might be useful if the screensaver has detected it should be blanking but is unable to.

It's also interesting that from the debug log, this happened after an initial password entry failure. That may be required to encounter this problem.