Dual processor problem with vncviewer on XP

[Richard Fox]

James,

The ping does not stop. I ran ping -t, and then started vncviewer.exe. When
the hang occurred, the ping continued to report access to the server. By the
way, the mouse on the client also continued to operate the cursor on the
server, although the client screen was frozen.

--Richard-- 

-----Original Message-----
From: James Weatherall [mailto:james.weatherall "at" realvnc.com] 
Sent: Friday, August 17, 2007 8:57 AM
To: 'Richard Fox'; vnc-list "at" realvnc.com
Subject: RE: Dual processor problem with vncviewer on XP

Richard,

If you run a "ping -t" from viewer computer to server and then run VNC
Viewer & reproduce the hang, does the ping also stop?

Cheers,

Wez @ RealVNC Ltd
 

> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Richard Fox
> Sent: 17 August 2007 02:23
> To: 'James Weatherall'; vnc-list "at" realvnc.com
> Subject: RE: Dual processor problem with vncviewer on XP
> 
> James,
> 
> I tried your suggestion to upgrade to the latest display driver. That 
> did not solve the problem.
> I then tried removing the NVIDIA driver, and running the client using 
> the windows XP VGA driver.  The problem persisted.
> 
> --Richard--
> 
> -----Original Message-----
> From: James Weatherall [mailto:james.weatherall "at" realvnc.com]
> Sent: Tuesday, August 14, 2007 6:55 AM
> To: 'Richard Fox'; vnc-list "at" realvnc.com
> Subject: RE: Dual processor problem with vncviewer on XP
> 
> Hi Richard,
> 
> It sounds like you have a problem with the display drivers on your 
> system.
> You might find that there's an upgrade from the manufacturer to fix 
> problems of this sort.
> 
> Regards,
> 
> Wez @ RealVNC Ltd
> 
> 
> > -----Original Message-----
> > From: vnc-list-admin "at" realvnc.com
> > [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of Richard Fox
> > Sent: 14 August 2007 00:06
> > To: vnc-list "at" realvnc.com
> > Subject: Dual processor problem with vncviewer on XP
> > 
> > I am looking for help on a problem with display freezes in
> vncviewer
> > running on a dual processor computer with Windows XP.
> >  
> > The primary symptom is that vncviewer running on a dual processor 
> > client freezes its video after a few seconds or a few
> minutes. But, it
> > works fine when I change boot.ini to run only one processor.
> >  
> > Additional Symptoms:
> >     The vnc link stays active, even though the viewer video
> is frozen.
> >     The mouse on the client continues to control the cursor on the 
> > server, even though the video on the client is frozen.
> >     High data rate video, such as YouTube video, or rapid
> scrolling in
> > Excel, causes the freeze to occur sooner than when the screens are 
> > fairly quiet.
> >     The debug log at level 100 is "effectively identical" for a 
> > successful 1 processor session, and for a frozen 2
> processor session.
> >     Assigning vncviewer process affinity to a single processor does 
> > not fix the problem.
> >     Assigning all process affinities except vncviewer to one 
> > processor, and assigning vncviewer to the other processor
> does not fix
> > the problem.
> >     Changing routers does not fix the problem.
> >     Turning off all firewalls and all anti-virus programs
> does not fix
> > the problem.
> >     The Java version of vncviewer also exhibits the freeze-up.
> >     Reversing the roles of the client and the server does
> not freeze
> > up.
> > Winvnc works fine on the dual processor machine, and
> vncviewer works
> > on the other (single processor) machine.
> >     Connecting to the same server from a different client computer 
> > that has a single processor does not freeze up. The problem
> appears to
> > be localized to the dual processor machine.
> >  
> > Client Configuration:
> >     vncviewer personal edition P.4.2.3 
> >     Windows XP Home with latest updates
> >         Including Windows Patch KB896256 for AMD dual processors
> >         Including AMD dual core processor patch 1.3.2.16
> >         Including AMD dual core optimizer
> >     AMD Athlon 64 X2 Dual Core Processor 4400+
> >     3 Gigabytes of RAM
> >     GeForce 6800 XT video card
> >     1 gigabit port to Linksys router
> >  
> > Server Configuration:
> >     winvnc4 4.1.2.0
> >     Windows XP Home with latest updates
> >     Dell Inspiron 8600 laptop
> >     100 mbps port to the same Linksys router
> >  
> > Network configuration:
> >     This is a local area network connected through a
> Linksys router. 
> >     The 2 computers are in the same room.
> >     I am controlling the server (a laptop) through the screen and 
> > keyboard of the client (a desktop with a large screen and good
> > keyboard.)
> >     The vnc logs report a 20,000 kbps connection    
> >  
> > Thanks
> >  
> > --Richard Fox--
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