4 Replies Latest reply: Sep 25, 2009 8:14 AM by Paul Suchomel
amorok Level 1 Level 1 (0 points)
I am not sure where to report bugs but ever since the upgrade to snow leopard as soon as I try to connect to my other computer with screen sharing I get a blank (black screen).

I have a temporary fix for anyone who experiences this. Just switch Adaptive quality to Full and go back again.

If someone could report this that would be great.
  • 1. Re: screen sharing bug.
    Siebbi Level 1 Level 1 (0 points)
    Thanks a lot amorok! I have exactly the same problem but your temp fix works.
    I think apple has a lot bug fixes to do.
  • 2. Re: screen sharing bug.
    alanterra Level 1 Level 1 (45 points)
    I am seeing similar behavior. I haven't done much debugging yet, but it appears that Jolly's Fast VNC http://www.jinx.de/JollysFastVNC.html works well under Snow Leopard. I find it much nicer than the built-in screen sharing in every way--except that copy/paste across computers is not as robust, and it doesn't display a large screen on a small screen as well as Apple's software.
  • 3. Re: screen sharing bug.
    Baldrick Level 1 Level 1 (50 points)
    I haven't tried screen sharing from Mac to Mac (I use screen sharing to control Linux and Windows boxes remotely). I can tell you:
    1) JollyFastVNC works well for me under Snow Leopard.
    2) Snow Leopard's Screen Sharing works very well for controlling Linux boxes. Earlier versions of Apple Screen Sharing were very slow in screen redraw, but Snow Leopard's version is actually more responsive than JollyFastVNC, and it's screen scaling results in clearer graphics than JollyFast.
    3) Snow Leopard's SS works very well (mostly) for controlling windows boxes, but several times now I've had the session lock up on the Windows side and it won't let me connect back in using any VNC until I reboot the windows box. This hasn't happened using other VNC viewer software on the Mac (even in Snow Leopard), so there seems to be some interaction between Snow Leopard's SS app and VNC on the PC that doesn't play nice. On the PC side I'm running Vista and the latest version of UltraVNC server.

    Has anyone tried to control a Snow Leopard Mac from a Linux or Windows box with VNC software (or a Mac using JollyFastVNC)? This could help Isolate where the blank/black screen problem is coming from. If other VNC viewer applications work fine controlling a Snow Leopard box, then the problem is in the Screen Sharing viewer. If other VNC viewer packages have similar problems, then the problem is in the Screen Sharing Server portion of Snow Leopards Screen Sharing.
  • 4. Re: screen sharing bug.
    Paul Suchomel Level 1 Level 1 (0 points)
    I am seeing the same thing.

    I am connecting from my MBP running SL (10.6.1), to 4 different Xserve's running Leopard (10.5.8).

    I discovered that Screen Sharing will connect with a blank screen when the remote system has a display resolution *greater than 1024x768*. If I reduce the resolution to 1024x768 then everything works as expected.

    Or, as others have mentioned, if the resolution is greater, and I get the blank screen, the work around is to switch the screen quality between Adaptive/Full or Full/Adaptive.