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Hi Pratik,<br>
<br>
you do not need a physical monitor on your servers to use gpu. My
knowledge of X11 is limited, but I think you need to declare a
display in your xorg config, probably so the windowing system can
set up buffers and so on(I welcome correction/clarification on this
point). As long as you have the display resolution on the server set
at least as large as your client's monitor you should not have the
problem you experienced. 2500x1600 would be a reasonably safe
setting. <br>
<br>
Burlen<br>
<br>
On 06/30/2011 04:03 AM, pratik wrote:
<blockquote cite="mid:4E0C57FF.7050000@gmail.com" type="cite">
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Burlen,<br>
Thanks a lot for that tip! Yes, that indeed was the problem.<br>
<br>
I was just wondering....why does the GPU rendering have to depend
on
the monitor at all? Since the GPU cards are doing the processing
(at
least as far as i know)...is there any way in which one can remove
this
monitor dependency altogether? <br>
Also, if it is not possible to do gpu rendering without a monitor,
then
is it impossible to use the gpu's present in a cpu+gpu
cluster(with
headless nodes)?<br>
<br>
I also tried xvfb, but it seems that it does not use the graphics
cards
at all, and i got terrible graphics.<br>
<br>
Thanks again,<br>
Pratik<br>
On Wednesday 29 June 2011 09:13 PM, Burlen Loring wrote:
<blockquote cite="mid:4E0B4838.4020105@lbl.gov" type="cite">
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Hi Pratik,<br>
<br>
I have had some similar issues when my desktop screen resolution
was
higher than the server display resolution. Do you know what the
display
resolution is set to on the server side? I was able to check the
server
side resolution using xrandr command. The issue was fixed by
increasing
the server display resolution in the xorg.conf. This could be
one
possibility for what you are seeing.<br>
<br>
Burlen<br>
<br>
On 06/29/2011 07:42 AM, pratik wrote:
<blockquote cite="mid:4E0B39E0.5070103@gmail.com" type="cite">Hi
everyone, <br>
This is my configuration(PV v.3.10.1): <br>
Server: desktop with 4 NVIDIA tesla C1060 cards; Client is a
laptop. <br>
To make use of GPU rendering, i start an Xserver on a free
display like
so(i cannot use the :0 display, also i cannot use $DISPLAY. if
i use
the $DISPLAY option, the server disconnects as soon as i load
data from
paraview): <br>
<br>
startx -- :14 <br>
<br>
and my .xinitrc contains <br>
<br>
exec xdm <br>
<br>
so that xdm executes on the Xserver that is started. <br>
once this is done, i simply run <br>
<br>
mpirun -np 4 pvserver -display localhost:14.0 <br>
OR <br>
pvserver -display localhost:14.0 <br>
<br>
<br>
Everything goes fine, client connects to server etc. But when
the
actual visualization is done, a strip at the top (roughly 1/3
of
screen) is blanked(see the attached image). A curious thing
that i
observed was that when i change the orientation, rotate the
object etc,
the LOD actor seems to render properly(meaning that i can see
the whole
picture), but after i let it settle then this clipping takes
place.
Only a few weeks back the rendering seemed to have happened
perfectly,
so i don't know why it is suddenly behaving this way now. <br>
<br>
Thanks in advance for the help. <br>
<br>
-pratik <br>
<br>
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