So, I narrowed it down with gdb. The problem is, glxinfo loops through
all 3 screens of my display - but it crashes if the screen is not the
default screen (the .N in $DISPLAY). I don't yet know _why_ it
crashes. I'm attaching a patch that works around it, by _not_ looping
through all screens, but just getting info on the screen in $DISPLAY.
It's good enough for my use, but it's really just a workaround, so I'm
not adding a 'patch' tag.
> > :0.0 xserver-xorg-video-nouveau 1:0.0.16+git20101210+8bb8231-2+exp2
> > :0.1 xserver-xorg-video-radeon 1:6.14.0-1+exp2
> > :0.2 xserver-xorg-video-nouveau 1:0.0.16+git20101210+8bb8231-2+exp2
>
> (Out of curiosity, how did you configure that setup?)
Nothing very interesting. 3 simple "Device" and "Screen" sections, then:
Section "ServerLayout"
Identifier "Default Layout"
Screen "S-nv0"
Screen "S-r0" RightOf "S-nv0"
Screen "S-nv1" RightOf "S-r0"
EndSection
Anyway, workaround patch attached. I might try to do more at some
point (build mesa from git, find the real bug, report upstream), though
I'm too busy at the moment.
Peter
--- mesa-demos-8.0.1/src/xdemos/glxinfo.c
+++ mesa-demos-8.0.1/src/xdemos/glxinfo.c
@@ -1197,7 +1197,6 @@
{
char *displayName = NULL;
Display *dpy;
- int numScreens, scrnum;
InfoMode mode = Normal;
GLboolean findBest = GL_FALSE;
GLboolean limits = GL_FALSE;
@@ -1248,9 +1247,8 @@
printf("%d\n", b);
}
else {
- numScreens = ScreenCount(dpy);
+ int scrnum = DefaultScreen(dpy);
print_display_info(dpy);
- for (scrnum = 0; scrnum < numScreens; scrnum++) {
mesa_hack(dpy, scrnum);
print_screen_info(dpy, scrnum, allowDirect, limits);
printf("\n");
@@ -1258,9 +1256,6 @@
#ifdef GLX_VERSION_1_3
print_fbconfig_info(dpy, scrnum, mode);
#endif
- if (scrnum + 1 < numScreens)
- printf("\n\n");
- }
}
XCloseDisplay(dpy);
