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List:       freedesktop-xorg
Subject:    Re: Xdmx issues
From:       Harm Nijveen <harm.nijveen () wur ! nl>
Date:       2010-06-30 14:11:05
Message-ID: 4C2B5079.9000008 () wur ! nl
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The first issue is solved when I only enable Xinerama for Xdmx and not 
on the backend X servers.

Cheers,
Harm

Nijveen, Harm wrote:
> Hi,
> 
> I am trying to get Xdmx working on a 12 screens/3machines setup and came across \
> some problems. 
> Using the "xorg-x11-server-extra" package in OpenSuse 11.3 RC1 (X11R7.5) I do get \
> Xdmx running together with Gnome and using Xinerama. However, when a window is \
> dragged across a screen boundary the window does not get redrawn (it turns grey), \
> unless the screen boundary is between two screens attached to different PCs. Any \
> ideas where to look for a solution? Is this a Xinerama problem? 
> The right two colums of the 4x3 setup show strange distortions, like parts of \
> windows from previous Xdmx sessions or a black and white diagonal banding pattern. \
> It looks like uninitialized memory is being displayed. This already happens if I \
> run gnome with Xdmx on one machine using four screens, but not when I run gnome \
> directly with the local X server. How can I debug this further? 
> Another issue involves a segfault of Xdmx when starting Glx programs, like \
> glxgears, glxinfo etc.: 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00000000005abdb2 in __glXGetVisualConfigs (cl=0x9fbbf0, pc=0x9f57c0 \
> "\214\016\002") at glxcmds.c:1546 1546        reply.numVisuals = \
> pGlxScreen->numGLXVisuals; (gdb) bt
> #0  0x00000000005abdb2 in __glXGetVisualConfigs (cl=0x9fbbf0, pc=0x9f57c0 \
> "\214\016\002") at glxcmds.c:1546 #1  0x00000000005a50e7 in __glXDispatch \
> (client=0x9f5420) at glxext.c:460 #2  0x000000000053d7e6 in Dispatch () at \
> dispatch.c:445 #3  0x000000000052f03e in main (argc=7, argv=0x7fffffffe458, \
> envp=0x7fffffffe498) at main.c:285 (gdb) print pGlxScreen
> $1 = (__GLXscreenInfo *) 0x0
> 
> It looks like a X_GLXGetVisualConfigs request is recieved and handled, but \
> glxInitVisuals was never called and so  "pGlxScreen = &__glXActiveScreens[screen];" \
> returns 0. Any ideas how to get around this? I really would like to be able run \
> OpenGL applications using Xdmx and Chromium, but that is not possible right now. 
> 
> About the configuration:
> From the Xdmx logging:
> (II) dmx: Generation:         1                                                     \
>  (II) dmx: DMX version:        1.2.20070424 (DMX Project)                           \
>  (II) dmx: DMX Build OS:       openSUSE (SUSE LINUX)                                \
>  (II) dmx: DMX Build Compiler: gcc 4.5.0                                            \
>  (II) dmx: DMX Execution OS:   Linux 2.6.34-9-desktop #1 SMP PREEMPT 2010-06-03 \
> 18:33:51 +0200           Vendor release:  10800000      
> 
> Videocard: NVidia Quadro FX 4700 X2
> Driver: NVIDIA-Linux-x86_64-256.35
> Using TwinView
> 
> Any help is appreciated.
> 
> Cheers,
> Harm Nijveen
> _______________________________________________
> xorg@lists.freedesktop.org: X.Org support
> Archives: http://lists.freedesktop.org/archives/xorg
> Info: http://lists.freedesktop.org/mailman/listinfo/xorg
> Your subscription address: harm.nijveen@wur.nl
> 
> 


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