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From: | Michael D Godfrey |
Subject: | Problem with Nvidia drivers for openGL |
Date: | Thu, 10 Dec 2009 16:59:08 -0800 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Thunderbird/3.0b4 |
As you likely know, Nvidia
keeps the specs for their video cards proprietary. But, they allow distribution of their drivers for Linux distributions. The way that Fedora has made this more convenient is to "recognize" a repository for "non-free" software (i.e. software for which source is not available). So, many people whose machines have Nvidia cards use this mechanism to get the "accelerated" drivers. These include Nvidia coded openGL libraries. After this introduction, I have found that the fltk backend works with the Nvidia openGL libraries except in one case: the use of NX such that the NX server is running on a system with the Nvidia openGL libraries installed. Plotting in an NX window running on a client connected the an NX server on a Nvidia machine with fltk works fine until you quit Octave. Then you get (if running Octave under gdb): octave:1> plot([1:200]) This can reasonably be classified as an NX problem. Running directly at the console on the machine works OK. NX server is supposed to give you a virtual console. So, something that they do causes the Nvidia library libGL.so.1 to seg fault. I can try sending this in to the NX folks (I do have a paid for server license), but I doubt if they will consider this to be very high priority. I will have to send them a copy of the current development Octave (or explain how to download it using hg). Anyhow, the purpose of this email is to document the correct facts about the seg fault problem that I have reported previously. All other connection paths between Nvidia machines running Fedora 11 now work without problems (since I figured out the "leftover" libraries problem, which was also causing seg faults). And, by the way, builds of the current development system work without problems of FC11 x86_64 machines. Michael |
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