Bug#524670: libxxf86vm1: Errors mentioning XFree86-VidModeExtension and XF86VidModeGetGammaRamp

[GSR <gsr.bugs@infernal-iceberg.com>]

Package: libxxf86vm1
Version: 1:1.0.2-1
Severity: normal

Some apps that adjust or report the gamma curves stopped working since
upgrading to xorg 7.4, they do nothing except print things like:

X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  129 (XFree86-VidModeExtension)
  Minor opcode of failed request:  17 (XF86VidModeGetGammaRamp)
  Value in failed request:  0x17
  Serial number of failed request:  8
  Current serial number in output stream:  8

Example app:

---8<--- invgamma.c
#include <X11/Xlib.h>
#include <X11/extensions/Xext.h>
#include <X11/extensions/xf86vmode.h>

#define GAMMA_COMPONENTS 3
#define GAMMA_RESOLUTION 256

/*
 * Ben Winslow <rain@bluecherry.net> - 9/28/2001
 * gcc -o invgamma invgamma.c -L/usr/X11R6/lib -lX11 -lXext -lXxf86vm
 */

int main(int argc, char *argv[])
{
	Display *dpy;
	unsigned short ramp_in[GAMMA_COMPONENTS][GAMMA_RESOLUTION];
	unsigned short ramp_out[GAMMA_COMPONENTS][GAMMA_RESOLUTION];
	int x, y;

	dpy = XOpenDisplay(NULL);
	if (XF86VidModeGetGammaRamp(dpy, DefaultScreen(dpy), GAMMA_RESOLUTION, ramp_in[0], ramp_in[1], ramp_in[2]) == False)
		return 1;

	for (x = 0; x < GAMMA_COMPONENTS; x++) {
		for (y = 0; y < GAMMA_RESOLUTION; y++) {
			ramp_out[x][y] = ramp_in[x][(GAMMA_RESOLUTION - 1) - y];
		}
	}

	if (XF86VidModeSetGammaRamp(dpy, DefaultScreen(dpy), GAMMA_RESOLUTION, ramp_out[0], ramp_out[1], ramp_out[2]) == False)
		return 1;

	return 0;
}
--->8--- invgamma.c

GSR
 

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.29-1-686 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libxxf86vm1 depends on:
ii  libc6                         2.9-7      GNU C Library: Shared libraries
ii  libx11-6                      2:1.2.1-1  X11 client-side library
ii  libxext6                      2:1.0.4-1  X11 miscellaneous extension librar

libxxf86vm1 recommends no packages.

libxxf86vm1 suggests no packages.

-- no debconf information