This is very useful to know, but not entirely trivial to fix. The VNCviewer
hooks the system Minimize and Maximize buttons to decide when to request
updates and when to stop. Instead, it should hook the WM_ message
dispatched when the window is to change Restore/Maximize/Minimize state.
That should fix the problem, but there may be some subtlety I'm missing.
Cheers,
James "Wez" Weatherall
--
"The path to enlightenment is /usr/bin/enlightenment"
Laboratory for Communications Engineering, Cambridge - Tel : 766513
AT&T Labs Cambridge, UK - Tel : 343000
----- Original Message -----
From: "Mark Harris" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, May 29, 2001 11:43 PM
Subject: Re: VNC Connection Freezes / Drops
> hi James,
>
> We can reproduce this problem. This note is going to give a better
> description of the hang, and then will detail the steps to follow to
> reproduce.
>
> The problem is in the client viewer. The symtpom is that the client
> viewer (full screen or window) freezes. The desktop does not refresh
and
> the host mouse is frozen. The "dot" mouse can be moved and the session
> can be minimized or closed. The good news is that we have not only
> figured out how to reproduce the problem, we know how to circumvent it
> also.
>
> The problem has been reproduced with the 3.3.3 viewer running on W2K and
> NT. It does not seem to matter what the server platform is; however, I
> have used both the Linux and NT platforms in my testing.
>
> Steps to reproduce the freeze:
>
> 1) start the viewer on an NT or W2K box.
> 2) minimize the session window to the toolbar
> 3) right click the toolbar icon for the session window
> 4) on the popup menu click 'fullscreen'
> 5) click the fullscreen acknowledgement
> 6) the session will be frozen, the mouse will be frozen, the 'dot' mouse
> will move
>
> now........
>
> 1) minimize the session by ctrl-esc esc and right click on the toolbar
> session icon
> 1a) click minimize
> 2) maximize the session by left clicking the toolbar session icon
>
> The session will now be freed, the mouse will move , etc.
>
> Alternate steps to reproduce the freeze:
>
> 1) start with the session in fullscreen mode (viewer on NT or W2K)
> 2) minimize the session with ctrl-esc esc and right click the toolbar
> session icon
> 2a) click minimize
> 3) now right click the toolbar session icon and click the 'fullscreen'
> option.... returning the session to window mode
> 4) the session will be frozen, the mouse will be frozen, the 'dot'
mouse
> will move
>
> now......
>
> 1) minimize the the window with the minimize control in the upper right
> corner of the window
> 2) maximize the window by left clicking the toolbar session icon
>
> The session will now be freed, the mouse will move, etc.
>
>
> There appears to be other ways to accomplish this same symptom. But
> this should get you started so that you can see the behavior that we are
> describing. As you see, the session can be freed by minimizing it and
> maximizing it WITHOUT touching the 'fullscreen' option. In the past we
> were simply closing the window.
>
>
> Thanks much,
>
>
>
>
> Mark H. Harris <><
>
> Staff Software Engineer
> Software Tools Development - IBM Rochester, MN
> iSeries Dept EL8Y/664-3 E115
> [EMAIL PROTECTED] (8) 456-6910 1-507-286-6910
> ---------------------- Forwarded by Mark Harris/Rochester/IBM on
05/29/2001
> 05:02 PM ---------------------------
>
> Mark Harris
> 05/23/2001 01:41 PM
>
> To: [EMAIL PROTECTED]
> cc:
> From: Mark Harris/Rochester/IBM@IBMUS
> Subject: Re: VNC Connection Freezes / Drops (Document link: Mark Harris)
>
> > Over some time, something happens between the viewer and the server,
> and
> > one or the other will hang. In our case, closing the windows and
> > reestablishing the connection gets us going again. Time before the hang
> > varies, but is definitely not network related. Something else is going
> > on.
>
> Closing the viewer window and reconnecting fixes the problem?
>
> Cheers,
>
> James "Wez" Weatherall
>
> -----------------------------------------------
>
> Yes. The cursor freezes... only the dot can be moved. It is possible
> to move the dot up and close the viewer window and restart. Something
is
> causing the viewer to lock, or hang, freeze...
>
> Thanks
>
> Mark H. Harris <><
>
> Staff Software Engineer
> Software Tools Development - IBM Rochester, MN
> iSeries Dept EL8Y/664-3 E115
> [EMAIL PROTECTED] (8) 456-6910 1-507-286-6910
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