I've played around with libXNVCtrl a bit and it seems that it just doesn't work on my card. Could you please try the attached program and see if you get the same failure that I do (XNVCTRLQueryAttribute assertion failed)?
-- Sam Morris http://robots.org.uk/ PGP key id 1024D/5EA01078 3412 EA18 1277 354B 991B C869 B219 7FDB 5EA0 1078
LDFLAGS := -lX11 -lXext -lXNVCtrl all: nvtest nvtest: nvtest.o gcc -o $@ $^ $(LDFLAGS)
#include <assert.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <NVCtrl/NVCtrl.h>
#include <NVCtrl/NVCtrlLib.h>
int main (int argc, char *argv[]) {
Display *dpy;
dpy = XOpenDisplay(NULL);
assert (dpy);
int event_base, error_base;
int core, amb;
assert (XNVCTRLQueryExtension (dpy, &event_base, &error_base));
assert (XNVCTRLQueryAttribute (dpy, 0, 0, NV_CTRL_GPU_CORE_TEMPERATURE, &core));
assert (XNVCTRLQueryAttribute (dpy, 0, 0, NV_CTRL_AMBIENT_TEMPERATURE, &amb));
printf ("core: %d\nambient: %d\n", core, amb);
return 0;
}
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