[PC-BSD Testing] Screen sharing

Arthur a-koziol at neiu.edu
Fri Feb 20 09:13:17 PST 2009


>Kris Moore wrote:
> > Walt Pawley wrote:
> >> At 12:29 AM -0800 2/15/09, Walt Pawley wrote:
> >>> Now that everyone is busy testing 7.1, I have an issue with -
> >>>
> >>> uname -a
> >>> FreeBSD compaq 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Mon
> >>> Nov 24 20:22:16 EST 2008
> >>> root at pcbsdx32-7:/usr/obj/pcbsd-build/cvs/7.0.2-src/sys/PCBSD
> >>> i386
> >>>
> >>> - that I can't seem to find any discussion on.
> >>>
> >>> The tale: I ran a 1.5.1 system that was working well. If it had
> >>> screen sharing, I was too dumb to find it so I used the x11vnc
> >>> port instead. No problems that I could see. I put off upgrading
> >>> until 7.0.2 seemed to settle down. I didn't look for screen
> >>> sharing. I just installed x11vnc and started trying to use it.
> >>>
> >>> This did not work well. It seemed to behave as though the
> >>> sleep/screen saver would kick in on the VNC window after only a
> >>> few seconds. It could be awakened just about long enough to
> >>> position the mouse and hit a button ... if you knew right where
> >>> it was. So, I started looking for a reason. Still haven't found
> >>> one but I did discover Screen Sharing.
> >>>
> >>> So, I tried it. It did not behave well either. It seemed to
> >>> provide two screen images, offset by about a 1/4-inch, mushed
> >>> together. On top of that are flickering, moving color blocks.
> >>>
> >>> The system seems to work well used at the console. No funny
> >>> screen artifacts. No quick sleep or screen saver invocations.
> >>> I've not changed my viewer, though I experimented with a range
> >>> of its settings to see what the behavior would be, and am, in
> >>> fact, using it to type this message right now (not via a PC-BSD
> >>> machine, however).
> >>>
> >>> Anyone with similar results or sage advice or ???
> >> Interestingly, either no one else has experienced this or it's
> >> considered too elementary to bother commenting upon. I did find
> >> out something about, none the less. I wrote Karl Runge about
> >> x11vnc and it's apparent change in behavior moving from PC-BSD
> >> 1.5.1 to PC-BSD 7.0.2. He quickly and kindly pointed me to
> >>
> >> <http://www.karlrunge.com/x11vnc/faq.html#faq-kde-screensaver>
> >>
> >> which pointed out that if I'd been just a bit smarter I could
> >> have solved my immediate problem all by myself. But it also
> >> pointed out that the problem is old and was probably something
> >> fixed in is PC-BSD's KDE3 that's reappeared in KDE4.
> >
> > Walt,
> >
> > I'm testing this here now as well, using the KDE Desktop Sharing daemon,
> > and vncviewer on another system. I see the same error where it looks
> > like two offset images, with flickering color blocks. When I force the
> > encoding to use "raw" the image ghosting goes away, but I still get
> > weird color blocks on the viewer when I try to move windows around. I'll
> > keep hunting and see i I can figure this out. I want to get a PBI built
> > of the vnc client here soon, so users can easily remote-control their
> > desktops, but it would be nice if it worked first :)
> >
> >
>
>Found this:
>
>http://forum.kde.org/kde4-looks-awful-over-vnc-t-16651.html
>
>Maybe its a KDE4 theme issue? All the effects don't render right over vnc?

I have not had a chance to test this on my own LAN and with VNC but it makes
me wonder if it's VNC that's doing it or just the changes made in KDE 
4.2. 4.2.1
is coming in early March so maybe the conflict will get fixed or if 
it's VNC they
will find the issue and squash it.

Arthur 



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