I was getting this popup too, and I also get high CPU load from windowserver ONLY WHILE IN SCREENSAVER MODE. I just hear the fans whirr up and such. I was looking at console log because of one MacWorld post:
http://www.macworld.com/article/1163410/bugs_and_fixes_when_os_x_lion_slows_to_a_crawl.html
I saw that windowserver was getting the request to set something foreground, for installing java. I looked at the timestamp and thought, what else happens at that time, which would throw the java installer? Well! com.facebook.videochat.Tom.updater was running! I had my culprit, and so I searched duckduckgo for com facebook videochat updater os x. And up came this:
http://www.mac-forums.com/forums/os...ebook-video-chat-plugin-causing-problems.html
1. They're using Java and Java sucks.
2. Whoever built this (at least the Mac version) should be fired.
Jackpot! Facebook videochat updater uses Java! That's what's running periodically. So...
Also, I was looking through different forums last night and came across one forum, where a guy advised to use launchctl remove function to get rid of the problem. I've tried to follow the instructions, and it seems to work, well at least I haven't experienced this problem for now. I'll keep you updated if I do.
I don't know the service (well, I mentioned it above, but maybe there's others) so I did
Code:
launchctl list | grep facebook
Two results: the com.facebook.videochat.Tom.updater and com.apple.facebook.xpc, which I think is fine. so. disabling that might fix it, and hopefully will fix my fans whirring up during the screensaver.
(You NEED to do the list first since it will use your name or some variant thereof in the filename, so without doing the launchctl list you won't know it.)