Michael Chadwick wrote:
This isn't that surprising, if you consider what the root problem here appears to be. I believe the double click problem originally described is due to the server believing the Alt key is depressed. Similar problems can occur with Ctrl and Shift (and possibly with any key). The issue appears to be that the viewer sends an "Alt down" sequence, but the subsequent "Alt up" sequence is never sent. Perhaps the viewer loses focus before this event is generated, or there is something else going on. Either way, the issue can be cleared by pressing the offending key and releasing it while the viewer has focus. This will clear the Alt (Ctrl, Shift, etc) key status on the server, and should resolve the problem.Eureka! I just had to support a user here at the office and was able to successfully defeat this bug.
Unfortunately, I do no remember exactly what I did, but it involved holding down the Ctrl, Shift, and Alt keys one at a time while clicking on icons on the screen. Some combination of one of the keys and clicking for a bit "fixed" the problem. The keyboard seemed to be functioning as well.
Sorry for this being such haphazard advice.
- Michael
I have also seen this problem happen when something is lying on the actual keyboard on the server machine depressing a key. I do not believe this technique will work in this situation.
Perhaps this is something that needs to be addressed in the VNC code. When focus is restored to the viewer, the current state of the modifier keys (or any keys) should be synced up. I do not know if the RFB protocol allows for polling the server for key states (I assume it does not), but that may be one way to intelligently do this.
-Ben : )
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Hernandez, Magdalena Sent: Tuesday, August 31, 2004 11:22 AM To: James Weatherall; [EMAIL PROTECTED] Subject: RE: Curious input problem when using VNC 4.0 Viewer
This is the same problem we were having. I think it is a bug. We tried
installing again, uninstalling, etc. VNC becomes not useable to the point
that you have to walk up to the pc or console.
Below is the description of the problem in an email from our problem.
Thanks,
Magdalena Hernandez Network Consultant Westline Medical Management
-----Original Message----- From: Hernandez, Magdalena [mailto:[EMAIL PROTECTED] Sent: Thursday, July 29, 2004 9:40 AM To: '[EMAIL PROTECTED]' Subject: FW: Keyboard input lost and left mouse button reacts as if I pres sed the right button
I want to add more information to the post about this problem.
We installed VNC 4.0 to Windows Servers both NT and 2000. At first everything seems ok, but then slowly server by server the left mouse button would functioning like the right one. You also can't type anything text unless you go to the server console. Then everything is fine. We previously had VNC 3.3.3 installed on all servers and there wasn't any problem.
We also used a program called FastPush to install the VNC software
everywhere. The program doesn't leave anything behind and FastPush is being
maintained from one PC. I however uninstalled (manually) VNC 4 first on one
pc and then installed (manually) the program fresh. This did not change
anything.
So since we could not find any information as to why the problem was
happening, we removed VNC 4.0 off of all the servers since they are in
remote sites. We installed VNC 3.3.7 instead. So far so good.
Magdalena Hernandez Network Consultant Westline Medical Management 510-995-5300
-----Original Message-----
From: Hernandez, Magdalena Sent: Thursday, July 22, 2004 2:20 PM
To: '[EMAIL PROTECTED]'
Subject: Keyboard input lost and left mouse button reacts as if I
pressed the right button
I saw this post but not a solution or a response that says this is a bug. We are having the problem with VNC 4.0. I have enclosed the email from the post.
I apologize if this has been answered already. Any help is appreciated.
The original post:
-----Original Message-----
From: vnc-list-admin "at" realvnc.com [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Dieter Blaas
Sent: Tuesday, July 06, 2004 8:05 AM
To: vnc-list "at" realvnc.com
Subject: Keyboard input lost and left mouse button reacts as if I pressed the right button
When I connect to a VNC4 server installed as service under win2k with a VNC4 viewer from a win2k machine, keyboard input and correct handling of the mouse buttons is often - but not always - lost after the 1st login: After login everything is fine. When I lock the workstation (ctr-alt-del followed by "lock workstation") and want to login again, keyboard input of the password does not work. The only way to get access to the machine is to write the password in an editor, to copy it into the clipboard and to enter it with copy / paste. However, although I get access to the PC by this method, pressing the left mouse button has an effect as if I had pressed the right button. I can still launch a program by choosing "open" in the menu displayed after pressing the left mouse button. However, keys are not correctly displayed and sometimes even give the same result as ctr-alt-del. After re-booting everything is correct again until I lock / unlock the workstation again. The same happens when I connect via the java viewer from IE6. What can I do? Thanx for help. Dieter
Thank you,
Magdalena Hernandez
Network Consultant
Westline Medical Management
_______________________________________________ VNC-List mailing list [EMAIL PROTECTED] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
Magdalena Hernandez Network Consultant Westline Medical Management 510-995-5300
-----Original Message----- From: Michael Chadwick [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 31, 2004 10:26 AM To: James Weatherall; [EMAIL PROTECTED] Subject: RE: Curious input problem when using VNC 4.0 Viewer
I don't remember if I tried the Alt key explicitly. That and it still leaves the matter of the keyboard being completely incapacitated both at the client and server level. Anyhow, it's hard to diagnose the problem since I am not connected to anyone via VNC, let alone experiencing the problem :-(
Thanks for the help, though.
-----Original Message----- From: James Weatherall [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 31, 2004 10:08 AM To: Michael Chadwick; [EMAIL PROTECTED] Subject: RE: Curious input problem when using VNC 4.0 Viewer
Does pressing and releasing the Alt key help at all?
Wez @ RealVNC Ltd.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Chadwick
Sent: 31 August 2004 17:13
To: James Weatherall; [EMAIL PROTECTED]
Subject: RE: Curious input problem when using VNC 4.0 Viewer
This does nothing and the problem persists. The mouse buttons continue
to be stuck with their mixed-up functionality.
-----Original Message----- From: James Weatherall [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 31, 2004 9:01 AM To: Michael Chadwick; [EMAIL PROTECTED] Subject: RE: Curious input problem when using VNC 4.0 Viewer
Michael,
What happens if you press and then release the Control key from within an active session to the problem server?
Wez @ RealVNC Ltd.
-----Original Message-----_______________________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Chadwick
Sent: 30 August 2004 19:55
To: [EMAIL PROTECTED]
Subject: Curious input problem when using VNC 4.0 Viewer
This concerns VNC 4.0 Final, on a Windows 2000 network (client and server):
When I use VNC viewer to connect to a remote user, a problem occurs sporadically.
First, the mouse buttons seem to get mixed up and when I double-click something (like, say, My Computer) it acts as if I right-clicked on it and chose Properties. The Ctrl key on the keyboard is also seemingly pressed down in the computer's mind because if I left-click on something and then another, they both get highlighted, and so on. Right-clicking on things seems to work, and that is how I have to open things. This only seems to happen on icons, as left-clicking on the Start Menu works as intended.
Second, the keyboard stops functioning. And this continues even if I stop viewing the remote user. Also, the user at the local computer loses keyboard functioning, as well.
One time this happened on a server and I just kept trying to type and the problem went away after about 15-20 minutes of frustrating experimentation. With all subsequent occurrences on users' workstations I just have them reboot and it fixes it.
Anyone else have this problem or (better yet) know of a fix?
- Michael
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