Note: This patch has been tweaked by VinzC to be applied using portage
Source: http://www.gentoo-wiki.com/HARDWARE_Samsung_X20#DRI.2C_Xvideo_and_co.
--- xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c   2005-07-03 09:01:32.000000000 +0200
+++ xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_agp.c~       2005-07-28 13:26:41.000000000 +0200
@@ -139,6 +139,12 @@
		return NULL;
	}

+	/*
+	 * Workaround to get DRI working with i915
+	 * (http://www.gentoo-wiki.com/HARDWARE_Samsung_X20#DRI.2C_Xvideo_and_co.)
+	 */
+	memset((char*)&agpinf, 0, sizeof(agpinf));
+
	if (ioctl(gartFd, AGPIOC_INFO, &agpinf) != 0) {
	xf86DrvMsg(screenNum, X_ERROR,
			"xf86GetAGPInfo: AGPIOC_INFO failed (%s)\n",