[AG-TECH] Multiple X Screens and VNC Problem (Linux)

[Jason Bell]

G'day All

As an update, I have also tried x11vnc using a variety of settings
(-xinerama -noxwarppointer -noshm -noxdamage -noxfixes to name a few)
without any luck.

I have tried recompiling, re-installing and re-starting vino, as suggest
http://bugzilla.gnome.org/show_bug.cgi?id=346258

I have also tried and number of xorg.conf settings.

The interesting kicker is that similar problems occur when using
synergy...  IE, can only control one of the screens.

I am now tending to think that the issue is more of an nvidia driver
issue or an xorg issue.

I initially submitted a bug report to the gnome forums, see
http://bugzilla.gnome.org/show_bug.cgi?id=570178, but with suspecting
the nvidia driver, I have submitted a nvidia forum post, see
http://www.nvnews.net/vbulletin/showthread.php?t=127386

Thanks for everyone's comments so far and I will keep you all posted.

Regards,
Jason.


_____________________________________________
From: Jason Bell 
Sent: Saturday, 31 January 2009 11:09 AM
To: ag-tech at mcs.anl.gov
Subject: Multiple X Screens and VNC Problem (Linux)


G'day All

I was hoping that someone might be able to help me out with a problem.

I have a Access Grid machine (details to follow) that has 2 x dual head
video cards.  I recently upgraded the machine to fedora 10 (No distro
flame wars please) in which I can no longer remote desktop (using vnc)
properly to be able to see and control all X Screens (4 in total).

In previous versions of Linux, I use to use "Desktop Sharing" in KDE,
but Krfb recently due to some software updates, has been found to be
problematic.

I am currently trying to use "Remote Desktop (Gnome)" in which appears
to work fine, but only allows me to control the primary display screen.
I have also tried x0vncserver with similar results.

I am using 2 nVidia Quadro FX1700 video cards, using nvidia-setting to
configure the 4 displays using xinerama.  Note: if I use Separate
Screens, I can only control the first screen, if I use Twinview, I am
able to control the first 2 screens, but not the other 2.

Also note that I need to be able to connect to this "desktop" via a
windows machine, using something like realvnc or ultravnc (I have tried
both).

Therefore, I was wondering if anyone knew a solution to this problem as
google doesn't seem to be helping me this time round.  Though it does
appear to be less an "distro" problem, as I have seen people (on the
web) complaining about similar problems with other flavours of Linux.

Someone mentioned that there might be a -ignorexinerama option within
the server or vncviewer, but I haven't been able to find anything.

Details on the system are as follows:

		Dell Precision T3400
		2.4GHz quad-core Core 2 (Q6600)
		Dual 512MB PCIe x16 nVidia Quadro FX1700 video cards
		2GB of Memory
		320GB SATA HDD (3.0Gb/s, 7.2k RPM)
		Gigabit NIC 
		16X max DVD+/-RW Drive
		Running Fedora 10 (x86_64 Version)

Your assistance in helping me to solve this problem would be extremely
appreciated.

Regards,
Jason.

--------------------------------------------
Jason Bell, B.I.T. (Honours)

Research Systems Support Officer
Information Technology Division 
CQ University Australia

Australian Research Collaboration Service
http://www.arcs.org.au/

E-mail : j.bell at cqu.edu.au
         jason.bell at arcs.org.au
Work   : +61 7 4930 9229
Mobile : 0409 630897
Postal : Building 19
         Central Queensland University
         Bruce Highway
         Rockhampton, Queensland, Australia, 4702
--------------------------------------------
Patience is a virtue.

But if I wanted Patience,
I would have become a Doctor.
--------------------------------------------

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/ag-tech/attachments/20090203/cf954e4d/attachment.htm>