<div dir="ltr"><div><div>I have done some more debugging and I do have a question. The clearest, repeatable issue I am seeing is when I run glxgears in apitrace. The crash always occrs at GLXChooseVisual. It returns NULL and from the documentation this means that it is encountering an undefined attribute. I see this when I am running either Ubuntu or Debian. The other tools (ie gdb and valgrind) have not given as clear an indication where the problem is (granted I admit that I may be not using them correctly either). My question is how would I determine what is causing this? I have search and have not found a clear explanation on how to troubleshoot this on the web. </div>Thanks </div>Herminio </div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Feb 2, 2016 at 4:08 PM, Herminio Hernandez, Jr. <<a href="mailto:herminio.hernandezjr@gmail.com" target="_blank">herminio.hernandezjr@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Mike, When I trace in gdb and let the program run I get the standard error: Using host libthread_db library "/lib/powerpc-linux-gnu/libthread_db.so.1". libGL: OpenDriver: trying /usr/lib/powerpc-linux-gnu/dri/tls/r300_dri.so libGL: OpenDriver: trying /usr/lib/powerpc-linux-gnu/dri/r300_dri.so libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: r300 libGL: OpenDriver: trying /usr/lib/powerpc-linux-gnu/dri/tls/swrast_dri.so libGL: OpenDriver: trying /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: swrast Both r300 and swrast driver fail to load and I do not get a backtrace. When run gdb again and force an interrupt at the point the r300 fails to load I see in the trace that it is failing at the driOpenDriver function. When I run the program again and stop when the swrast driver fails in the trace I see it fail at the same spot. Unless I am reading the backtrace wrong I think that is where is the issue is. I am attaching the file so you can see. Herminio > On Jan 26, 2016, at 7:49 PM, Michel Dänzer <<a href="mailto:michel@daenzer.net">michel@daenzer.net</a>> wrote: > > On 26.01.2016 19:15, Herminio Hernandez Jr. wrote: >> Would the same thing apply swrast driver? I see glxgears trying to >> fall back to it and relieving the same error. > > Possibly, though that's a bit weird indeed. Anyway, trace the code > execution (e.g. in gdb) and see. > > > -- > Earthling Michel Dänzer | <a href="http://www.amd.com" rel="noreferrer" target="_blank">http://www.amd.com</a> > Libre software enthusiast | Mesa and X developer </blockquote></div> </div>