(gdb) bt f
#0  drm_intel_gem_bo_start_gtt_access (bo=0x2be6f40, write_enable=1) at ../../../libdrm/intel/intel_bufmgr_gem.c:835
	bufmgr_gem = (drm_intel_bufmgr_gem *) 0x0
	set_domain = {handle = 0, read_domains = 64, write_domain = 64}
	ret = <value optimized out>
#1  0x00007fb8e3e5b513 in I830CopyPlanarData (pScrn=<value optimized out>, pPriv=0x22d5d90, buf=0x7fb8d2047000 '\020' <repeats 200 times>..., srcPitch=320, srcPitch2=160, dstPitch=192, srcH=240, top=0, left=<value optimized out>, h=240, w=320, id=808596553) at ../../src/i830_video.c:1406
	i = <value optimized out>
	src1 = (unsigned char *) 0x7fb8d2047000 '\020' <repeats 200 times>...
	src2 = <value optimized out>
	src3 = <value optimized out>
	dst_base = <value optimized out>
	dst1 = <value optimized out>
	dst2 = <value optimized out>
	dst3 = <value optimized out>
	dstPitch2 = 384
#2  0x00007fb8e3e6068e in I830PutImage (pScrn=0x228d1e0, src_x=0, src_y=0, drw_x=187, drw_y=0, src_w=<value optimized out>, src_h=240, drw_w=399, drw_h=397, id=808596553, buf=0x7fb8d2047000 '\020' <repeats 200 times>..., width=320, height=240, sync=0, clipBoxes=0x7ffff00d84d0, data=0x22d5d90, pDraw=0x2b79f50) at ../../src/i830_video.c:2488
	pI830 = (I830Ptr) 0x228efb0
	pScreen = (ScreenPtr) 0x22be170
	pPixmap = <value optimized out>
	x1 = 0
	x2 = 20971520
	y1 = 0
	y2 = 15728640
	srcPitch = 320
	srcPitch2 = 160
	dstPitch = 192
	destId = 808596553
	dstPitch2 = 0
	top = <value optimized out>
	left = <value optimized out>
	npixels = 320
	nlines = <value optimized out>
	size = <value optimized out>
	dstBox = {x1 = 187, y1 = 132, x2 = 586, y2 = 529}
	pitchAlignMask = <value optimized out>
	alloc_size = <value optimized out>
	crtc = (xf86CrtcPtr) 0x2290b70
#3  0x000000000049c416 in xf86XVPutImage (client=<value optimized out>, pDraw=0x2b79f50, pPort=0x22d6e10, pGC=<value optimized out>, src_x=1, src_y=0, src_w=320, src_h=64, drw_x=0, drw_y=0, drw_w=<value optimized out>, drw_h=<value optimized out>, format=0x22d6a80, data=0x7fb8d2047000 '\020' <repeats 200 times>..., sync=0, width=<value optimized out>, height=<value optimized out>) at ../../../../hw/xfree86/common/xf86xv.c:1768
	WinRegion = {extents = {x1 = 187, y1 = 132, x2 = 586, y2 = 529}, data = 0x0}
	ClipRegion = {extents = {x1 = 187, y1 = 132, x2 = 586, y2 = 529}, data = 0x0}
	ret = <value optimized out>
#4  0x00007fb8e4d6659b in ProcXvShmPutImage (client=0x2beeeb0) at ../../Xext/xvdisp.c:1171
	pDraw = (DrawablePtr) 0x2b79f50
	pPort = (XvPortPtr) 0x22d6e10
	pImage = (XvImagePtr) 0x22d6a80
	pGC = (GCPtr) 0x2bb0a70
	status = <value optimized out>
	size_needed = 64
	i = <value optimized out>
	width = <value optimized out>
	height = <value optimized out>
#5  0x000000000044e304 in Dispatch () at ../../dix/dispatch.c:437
	result = <value optimized out>
	client = (ClientPtr) 0x2beeeb0
	nready = 0
	start_tick = 2980
#6  0x0000000000433d8d in main (argc=10, argv=0x7ffff00d8798, envp=<value optimized out>) at ../../dix/main.c:397
	i = 1
	alwaysCheckForInput = {0, 1}