I'm wondering if this is a bug or intentional? It makes sense to meto give more CPU time to interactive applications and lower CPU to those where there isn't someone on a terminal waiting for a response.
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On Fri, 14 Aug 2015, Matthew L. Dailey wrote:
Date: Fri, 14 Aug 2015 16:21:49 -0400 From: Matthew L. Dailey <matthew.l.dailey@dartmouth.edu> To: "x2go-user@lists.x2go.org" <x2go-user@lists.x2go.org> Subject: [X2Go-User] Graphical apps stalling in suspended session
We ran into an odd issue recently that feels like a bug, but I wanted to throw it out to the community to see if anyone else has seen this or has any ideas.
When we run a graphical app in xfce via X2Go and then suspend the session, the app continues to run, but significantly slower than if we remain connected. If we resume the session while the app is still running, it resumes its normal speed. This issue seems identical to bug 673 (<http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=673>), but this was closed because it was not reproducible.
The simplest way I found to reproduce this is to have gnuplot plot in a loop, so it takes a while. If I use this input file:
do for [a=1:200] { plot sin(x+a) }
It runs in a reasonable amount of time while logged into an xfce x2go session: $ time gnuplot plot.txt
real 0m6.059s user 0m1.348s sys 0m0.124s
If I use a sleep first and suspend so gnuplot runs in the suspended session, it takes much longer: $ sleep 5; time gnuplot plot.txt
real 2m24.365s user 0m1.516s sys 0m0.176s
Another way to reproduce is to run glxgears and then suspend and resume. Youÿÿll see that while suspended, the frame rate is significantly lower, but then resumes normal speed when the session is resumed.
Here are the particulars of the server: OS: Xubuntu 14.04.3 (built this to test - weÿÿre primarily seeing this on our Ubuntu 14.04.3 systems with xfce) x2goagent: 2:3.5.0.32-0~668~ubuntu14.04.1 x2goserver: 4.0.1.19-0~1064~ubuntu14.04.1 x2goserver-extensions: 4.0.1.19-0~1064~ubuntu14.04.1 x2goserver-xsession: 4.0.1.19-0~1064~ubuntu14.04.1
Thanks for any help you can provide. Let me know if you have questions or need any other information.
-- Matthew L. Dailey Senior Systems Engineer Thayer School of Engineering Dartmouth College
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