Gray background after wakeup after lion upgrade?

Moystard solution worked like a charm!

Simply relaunch the process 'Dock' which relaunches desktop as well.

:)>- FIXED

I would not call that a fix, just a quick way to solve the problem when it occurs (but would be better if it just did not occur!)

I'm seeing it too. killing the doc in the activity monitor does restore it.

I'm only seeing this when my new MBA is connected to my new Thunderbolt

It happens randomly.

between this and the weird USB issues with the thunderbolt display I get mad.

Still having this problem with 10.7.2 on a MacBook Pro 15" early 2011, conntected to a HP w2207h via miniDP to DVI, and DVI to HDMI cable.

Just another thing Lion has screwed up when using dual monitors.

Out of interest has anyone ever seen anyone from Apple atleast acknowledge that there is a problem? This does not seem to be an isolated problem and we have all been waitning blinding assuming they will fix it every patch.

I thought we pay these exteme prices for better customer service and products that work great?

zilch so far

I just started getting this problem after the last update (10.7.2). Secondary display goes gray after wakeup or screensaver. The only thing I found to restore the background quickly is to run terminal and use "killall Dock" it's a little faster than rebooting. Apple needs to step it up and confirm this as a legit bug in the OS. I miss my Snow Leopard.

having the same issue here with mbp 13", mac osx 10.7.2 and extrernal 24" display.

also have a strange black line in the menu field. the background switches between grey and black when switching between spaces.

killing the dock process on the terminal solves it, but this bug should be solved as soon as possible!

I think I figured it out. I adjusted the resolution on the secondary screen a few times after killing the dock process (set it back to the proper resolution afterwards). Then I moved the position from left to right to top in the display settings. Looks like the OS overwrote whatever bug was causing the issue. I've had no problems since. Hopefully it stays that way permanantly.

After reading everyones' comments, I'm not sure if this is the right place for my reply. However, if anyone can help, I would appreciate it.

Every now and again I am experiencing a grey wake up login screen. The only way I can explain it is it's like my whole screen has been painted grey and you can't see the login area. However, if I move my mouse side to side, then its like an erase function that removes the grey one little box at a time until the login area is revealed. Has anyone else experienced this.

I recently upgraded to Lion on my 13 inch MBP 2.3 GHz, i5, 4 GB ram.

Thanks all for your help.

I did what darks0ld13r suggested (change resolutions, move positions) and it seems to have worked. I have only had the screensaver come on a couple times so far, but each time when I came back, my background was still there. It was gone every time I came back in the past. Thanks.

Unfortunately, when I came back from lunch, my desktop background on my external monitor was once again gray, so changing resolutions and moving positions did not FIX the problem. It only temporarily fixed the problem. The simplest temporary fix is to open terminal and type killall Dock and everything comes back, but it's very irritating that we have to do this.

My experience is that multiple monitor handling is completely whack in Lion. I am seeing the random gray background after wake, just like many other folks. I am also seeing that when logging in after the screen has locked, the login dialog will appear on the non-primary screen and after loging in my windows will be randomly redistributed among the screens. This is beyond annoying and quickly aproaching unusable. It feels that much worse because it is not what I have come to expect from Apple and this is the state after two updates (i.e. 10.7.2).

I too have this issue, but I find that it's occurance depends on how a wake my computer. If I wake it with the keyboard, I get the gray screen, but, if I wake it with a mouse click, I don't.