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gnustep application not running on machines with NVIDIA Optimus chipset


From: Julian Mayer
Subject: gnustep application not running on machines with NVIDIA Optimus chipset
Date: Wed, 14 Dec 2011 03:42:11 +0100

halle all

so far i've had good success building a deployable binary package of my gnustep 
using application. although there are some issues, the built package seems to 
launch and run on all recent linux distributions - great!

there is one exception. recent nvidia based laptops have a technology called 
optimus [1] that is supposed to seamlessly use a integrated and a discrete 
graphics card. there is no official linux support, linux users currently have 
to resort to a 3rd party project [2]. optimus users are expected to launch GPU 
intensive applications (like my game) using "optirun <command>" so that the app 
uses the nvidia instead of the integrated GPU.

however, launching a GNUstep based GUI applications seems to be impossible with 
optirun, attached is a backtrace that shows that my app is crashing right 
inside the gnustep window creation routines [3].

i am not sure if there is a problem in GNUstep here, but if someone has some 
more details or insight that i could attach to the bugreport i am gonna open at 
the Bumblebee project, that would be great. 

thanks, julian



[1]
http://www.nvidia.com/object/optimus_technology.html

[2]
https://github.com/Bumblebee-Project/

[3]
Program received signal SIGSEGV, Segmentation fault.
0x00007f059f13d235 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x00007f059f13d235 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f05a2c8a107 in ?? () from /usr/lib/x86_64-linux-gnu/librrfaker.so
#2  0x00007f05a2c8b143 in ?? () from /usr/lib/x86_64-linux-gnu/librrfaker.so
#3  0x00007f05a2c7e9fa in XCreateSimpleWindow ()
   from /usr/lib/x86_64-linux-gnu/librrfaker.so
#4  0x00007f05960d8eb8 in -[XGServer(WindowOps) _setupRootWindow]
    at XGServerWindow.m:1575
#5  0x00007f05960cefca in -[XGServer _initXContext]
    at XGServer.m:462
#6  0x00007f05960cf0be in -[XGServer initWithAttributes:]
    at XGServer.m:475
#7  0x00007f05a2798ccd in +[GSDisplayServer serverWithAttributes:]
    at /home/notroot/Desktop/core/gui/Source/GSDisplayServer.m:189
#8  0x00007f05a2620b67 in -[NSApplication _init] 
    at /home/notroot/Desktop/core/gui/Source/NSApplication.m:881
#9  0x00007f05a1cac2e1 in -[NSObject(NSThreadPerformAdditions) 
performSelectorOnMainThread:withObject:waitUntilDone:modes:] 
    at /home/notroot/Desktop/core/base/Source/NSThread.m:1194
#10 0x00007f05a26211be in -[NSApplication init]
    at /home/notroot/Desktop/core/gui/Source/NSApplication.m:975
#11 0x00007f05a2620ad0 in +[NSApplication sharedApplication] 
    at /home/notroot/Desktop/core/gui/Source/NSApplication.m:847
#12 0x00007f05a2606cb4 in NSApplicationMain
    at /home/notroot/Desktop/core/gui/Source/Functions.m:78
#13 0x0000000000461a8d in main ()


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