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Screen Sharing bug?

676 Views 3 Replies Latest reply: Jun 18, 2012 2:00 PM by Schwa72 RSS
Dayday95 Level 1 Level 1 (0 points)
Currently Being Moderated
May 10, 2012 3:04 AM

Ever since I bought my iMac I have been encourntering this problem. A brief overview of my setup: MacBook Pro late 2008 (OS X 10.7.3) and iMac 2011 (OS X (10.7.3).


My iMac have three registered accounts all of which carries the Admin status for my brother, my dad and me. Many times when my brother or my dad is using the iMac I want to use it without physically being in front of the computer. This is where Screen Sharing in OS X Lion comes in handy. However I strongly believe there is a bug in the application that needs some serious fixing.


This is the problem: Many times when I use Screen Sharing to interact with my account on the iMac in the background while my brother's account is active in the foreground I am not signed in prior and rely on Screen Sharing to help me do that. However when Screen Sharing does that, there is a high chance that I will only see the gray linen image on my end on my MacBook Pro, and it would stay like that forever unchanged. When I physically go to the iMac to log in to my account using the quick switch menu on the Menu Bar through my brother's active account, the foreground graphic freezes. While everything in the background such as the Dock and and windows are all still interactive through the keyboard only since the cursor is now the rainbow wheel which renders it uninteractive. The first time I ran into this issue I tried sleeping my iMac by pressing the power button once and waking it up. However this didn't work even after sleeping and waking the top layer of graphic is still frozen. In the end I would have to use the Control + Option + Command + Eject shortcut to shut down my computer.


The second scenario is when no account is active and the computer shows the Login Window. In this scenario when I try to contact the iMac through Screen Sharing on my MBP I can see the Login Window fine. However I am not able to click into any one of the account. Only when I am physically in front of the iMac I realise that the cursor is frozen. This time however, when I sleep and wake up the computer again it would all be back to normal and I can sign in through my iMac.


Is anyone out there experiencing similar issue? If so are you able to resolve it? I have already filed a feedback to Apple about this bug and I hope they will take it into regard in the next update to OS X Lion. My expectation is to have this bug gone in Mountain Lion.

iMac, Mac OS X (10.7.3), 4 Core 2.7GHz i5, 8GB RAM
  • Schwa72 Level 1 Level 1 (15 points)
    Currently Being Moderated
    Jun 17, 2012 2:35 PM (in response to Dayday95)

    I have the same exact problem with Screen Sharing and the gray linen screen.  In my case, I have a MBP with two accounts (mine and my wife's) and an iMac with only one account.  The only way that I can access my MBP account in the background from my iMac (if my wife's account is the active foreground account on the MBP) is if my MBP account has already been logged into.  If I try to sign into my MBP account from my iMac I only get the gray linen screen.


    Did you ever get a resolution to this issue?

  • Schwa72 Level 1 Level 1 (15 points)
    Currently Being Moderated
    Jun 18, 2012 2:00 PM (in response to Dayday95)



    I'm pretty convinced this simply a GUI issue.  Here's why.  Today I tried logging into my account on my MBP from my iMac (my wife's MBP account was already logged into but mine wasn't).  As described above, the grey linen screen popped up and there were no icons in it at all.  However, what I did this time was click where my login icon should've been, typed my password, and voila, Screen Sharing worked as expected.  Taking this a step further, I tried again, but this time when the gray linen screen popped up, I clicked where my wife's login icon should've been, typed her password, and her screen popped up on my iMac via Screen Sharing.  If I click where the Guest login icon should be, I get a message stating that the system will restart to a Safari-only guest user account (since I haven't configured a guest account).


    Anyway, it seems that not all of the login screen elements are being transmitted over the Screen Sharing protocol properly; instead, all we get is the gray linen background.  If you act and click as though the screen elements are there, Screen Sharing works as advertised.


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