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Why does my entire system freeze when I watch YouTube after Lion install?

10.7 Build 11A511 2.7 GHz Core i5 4GB 1TB HD


When I acess videos on youtube.com or even watch embedded videos my whole system freezes. I have tried other browsers etc and even in uninstalled and installed flash.

iMac, Mac OS X (10.7)

Posted on Jul 20, 2011 3:13 PM

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150 replies

Aug 6, 2011 10:50 AM in response to brentg33

All the posts here seem to refer to video issues. But, I can't help wondering if this is a wider issue. MacBook Pro i7 on OS10.7 Lion here. I am getting the system freeze when I leave the computer for some time.


The interesting point is that the symptoms seems the same:


Mouse movable

No clicking available.

Unresponsive

Requires hard reboot.


With me it doesn't seem to be related to any particular program. What I do notice is that windowserver and fseventsd will start using 100% (or more) of the CPU.

Aug 6, 2011 11:38 PM in response to Ken McEwen

Another theory... On wakeup the MobileMe Sync runs. The various maintenance scripts (Cron scripts) will also run, because the computer was asleep at the time they were scheduled during the night. Maybe also, updates, snapshots and then spotlight re-indexing are all also going to run.


These combined will be using a lot of CPU for a while. The advantage of setting the sleep preference to "never" is that the cron scripts etc will run normally in the night and not load the CPU in the morning.

Aug 7, 2011 1:11 PM in response to steevil

10.7.2, which is in the developers hands right now and should be released soon fixes the issue. In the meantime, go to Energy saver settings, change "Computer Sleep" to Never and reboot. It has totally resolved this issue for me.


When the patch comes out, we can all go back to computer sleep mode if we want! I was plagued with this issue and on Thursday I tried this and I have watched a ton of videos without one single lock up.


A PITA? Yes. When people say that it makes the computer useless, that they are taking it back because it's garbage, it is just riduclous. Here is a easy fix, costs you nothing, and you will be asked to live this way for about a week. Get a grip people. There are far bigger problems in the world.

Aug 8, 2011 7:39 PM in response to janimac62

Ok this makes no sense. After many freezes mostly video related, I went back to Snow leopard, actually had 2 video crashes on snow leopard. Went back to Lion a week ago just to see what happened...not a single crash.

watched many videos.

I did notice last crash Parallels was running I have not run it since. I will wait a few more days and try running Parallels and see what happens.

imac 27 i7 8gb ram 2010

Aug 10, 2011 3:11 PM in response to Yousifz

The ONLY thing anyone can do right now is just go back to Snow Leopard. I did that a few days ago and have had no problems that Lion currently has with freezing etc. I know it ***** that we have to wait for Apple to fix this but if your like me , I had enough of the Lion issues and am going to sit and wait for them to fix this. I have called into apple support four times and nothing has helped btw. There has to be an update soon..

Why does my entire system freeze when I watch YouTube after Lion install?

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