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Old 08-05-2011, 02:44 PM   #1
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Registered: Aug 2011
Posts: 1

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"fatal IO error 11 (Resource temporarily unavailable) on X server" with two windows


I am programming on XLib with Code::blocks, and I have a crash when I opens two windows and I close one of them. I am on Ubuntu 10.10 64 bits, but it is the same thing on a virtual machine and Ubuntu 11.04 32 bits. the program is a sample "hello world" where I have just added a second window. The crash happens when I close one of the two windows:

fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0" after 16 requests (14 known processed) with 0 events remaining.

Process retourned 1 (0x1) execution time : 9.120 s
Press ENTER to continue
I have found this thread and this thread, but no one wich seems like my problem.

My code:

* xsimple : Affiche une chaine dans une fenetre X...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define _X_SENTINEL(x)
#include <X11/Xlib.h>

GC gc;
Display *display;
int screen;
Window win1, win2, root;
unsigned long white_pixel, black_pixel;

* fonction associee a l'evenement EXPOSE

void expose (Window win)
XDrawString (display, win, gc, 10, 30, "Hello, world !", 14);

* programme principal

int main(int ac, char **av) {
char *dpyn = NULL;

/* selection du display en ligne */
if (ac == 3) {
if (strcmp (&av[1][1], "display") == 0) {
dpyn = av[2];
else {
fprintf (stderr, "Usage: xsimple [-display display_name]\n");
exit (1);

if ((display = XOpenDisplay (dpyn)) == NULL) {
fprintf (stderr, "Can't open Display\n");
exit (1);

// XSetCloseDownMode(display, RetainTemporary /*RetainPermanent*/);

screen = DefaultScreen (display);
gc = DefaultGC (display, screen);
root = RootWindow (display, screen);
white_pixel = WhitePixel (display, screen);
black_pixel = BlackPixel (display, screen);

win1 = XCreateSimpleWindow (display, root, 0, 0, 200, 100, 2, black_pixel, white_pixel);
win2 = XCreateSimpleWindow (display, root, 300, 0, 200, 100, 2, black_pixel, white_pixel);

XSelectInput (display, win1, ExposureMask);
XSelectInput (display, win2, ExposureMask);

XStoreName (display, win1, "xsimple 1");
XMapWindow (display, win1);

XStoreName (display, win2, "xsimple 2");
XMapWindow (display, win2);

for ( ; ; ) {
XEvent ev;

XNextEvent (display, &ev);

switch (ev.type) {

case Expose :

expose (ev.xany.window);

default :


Thanks to all


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