Second try:


(gdb) bt full
#0  0xb7b7810e in i830_free_memory (pScrn=0x821be58, mem=0x86d87d8) at ../../src/i830_memory.c:289
No locals.
#1  0xb7b7cee7 in I830PutImage (pScrn=0x821be58, src_x=<value optimized out>, src_y=<value optimized out>, drw_x=106, drw_y=0, src_w=320, src_h=240, 
    drw_w=1066, drw_h=800, id=808596553, 
    buf=0xa252c000 "\027\027\027\026\026\026\026\026\026\016\t\n\020\030\036 \032\033\033\032\031\030\027\027\025\027\030\031\026\022\021\024 %*//+#\034\025\024\034#\037\030\030\032\031\027\026\024\021\017\r\f\023!.8967:<:7553.) #5>:3/,)(('%!\034\031\032\034\035\037!\"$%\"\037\037\037\037\037\037\037!\"\"###$$*7GSSPTUQ<\036\025\027\026\027\032\036\035\037#\037\022\033Mbfghijkkkjjjjjjjfdfge^TLF@@PabWOSXXXXXXXWVVVVVVVV", 'U' <repeats 15 times>..., width=320, height=240, 
    sync=0, clipBoxes=0xbfd47034, data=0x822e2f4, pDraw=0x846f850) at ../../src/i830_video.c:2325
        pI830 = (I830Ptr) 0x821d848
        pScreen = (ScreenPtr) 0x8228df8
        pPixmap = <value optimized out>
        x1 = 0
        x2 = 20971520
        y1 = 0
        y2 = 15728640
        srcPitch = 320
        srcPitch2 = 160
        dstPitch = 192
        destId = 808596553
        top = <value optimized out>
        left = <value optimized out>
        npixels = <value optimized out>
        nlines = <value optimized out>
        size = 138240
        dstBox = {x1 = 106, y1 = 0, x2 = 1172, y2 = 800}
        pitchAlignMask = <value optimized out>
        alloc_size = 276480
        extraLinear = <value optimized out>
        crtc = <value optimized out>
#2  0x080da445 in xf86XVPutImage (client=0x886aa30, pDraw=0x846f850, pPort=0x822d680, pGC=0x839ba40, src_x=<value optimized out>, 
    src_y=<value optimized out>, src_w=<value optimized out>, src_h=<value optimized out>, drw_x=0, drw_y=0, drw_w=<value optimized out>, 
    drw_h=<value optimized out>, format=0x8259230, 
    data=0xa252c000 "\027\027\027\026\026\026\026\026\026\016\t\n\020\030\036 \032\033\033\032\031\030\027\027\025\027\030\031\026\022\021\024 %*//+#\034\025\024\034#\037\030\030\032\031\027\026\024\021\017\r\f\023!.8967:<:7553.) #5>:3/,)(('%!\034\031\032\034\035\037!\"$%\"\037\037\037\037\037\037\037!\"\"###$$*7GSSPTUQ<\036\025\027\026\027\032\036\035\037#\037\022\033Mbfghijkkkjjjjjjjfdfge^TLF@@PabWOSXXXXXXXWVVVVVVVV", 'U' <repeats 15 times>..., sync=0, 
    width=<value optimized out>, height=<value optimized out>) at ../../../../hw/xfree86/common/xf86xv.c:1777
        portPriv = <value optimized out>
        WinRegion = {extents = {x1 = 106, y1 = 0, x2 = 1172, y2 = 800}, data = 0x0}
        ClipRegion = {extents = {x1 = 106, y1 = 0, x2 = 1172, y2 = 800}, data = 0x83e16d8}
        ret = 0
#3  0xb7c2f7f8 in XvdiPutImage (client=0x886aa30, pDraw=0x846f850, pPort=0x822d680, pGC=0x839ba40, src_x=<value optimized out>, src_y=<value optimized out>, 
    src_w=<value optimized out>, src_h=<value optimized out>, drw_x=<value optimized out>, drw_y=<value optimized out>, drw_w=<value optimized out>, 
    drw_h=<value optimized out>, image=0x8259230, 
    data=0xa252c000 "\027\027\027\026\026\026\026\026\026\016\t\n\020\030\036 \032\033\033\032\031\030\027\027\025\027\030\031\026\022\021\024 %*//+#\034\025\024\034#\037\030\030\032\031\027\026\024\021\017\r\f\023!.8967:<:7553.) #5>:3/,)(('%!\034\031\032\034\035\037!\"$%\"\037\037\037\037\037\037\037!\"\"###$$*7GSSPTUQ<\036\025\027\026\027\032\036\035\037#\037\022\033Mbfghijkkkjjjjjjjfdfge^TLF@@PabWOSXXXXXXXWVVVVVVVV", 'U' <repeats 15 times>..., sync=0, 
    width=<value optimized out>, height=<value optimized out>) at ../../Xext/xvmain.c:730
No locals.
#4  0xb7c32666 in ProcXvShmPutImage (client=0x886aa30) at ../../Xext/xvdisp.c:1180
        ev = {type = 239 '�', bpad0 = 252 '�', sequenceNumber = 2068, drawable = 136341316, minorEvent = 29008, majorEvent = 212 '�', bpad1 = 191 '�', 
  shmseg = 3218370968, offset = 136014349, pad0 = 143043120, pad1 = 136692632, pad2 = 1}
        pDraw = (DrawablePtr) 0x846f850
        pPort = (XvPortPtr) 0x822d680
        pImage = (XvImagePtr) 0x8259230
        pGC = (GCPtr) 0x839ba40
---Type <return> to continue, or q <return> to quit---
        status = 0
        size_needed = <value optimized out>
        i = <value optimized out>
        width = 320
        height = 240
#5  0x0814feee in XaceCatchExtProc (client=0x886aa30) at ../../Xext/xace.c:299
        major = 140
        ext = <value optimized out>
#6  0x0808d93f in Dispatch () at ../../dix/dispatch.c:502
        result = <value optimized out>
        client = (ClientPtr) 0x886aa30
        nready = 0
        start_tick = 355940
#7  0x080747ab in main (argc=10, argv=0xbfd476f4, envp=0x0) at ../../dix/main.c:452
        pScreen = <value optimized out>
        i = 1
        error = 136164272
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb) 

(gdb) down
#0  0xb7b7810e in i830_free_memory (pScrn=0x821be58, mem=0x86d87d8) at ../../src/i830_memory.c:289
289     ../../src/i830_memory.c: No such file or directory.
        in ../../src/i830_memory.c
(gdb) print *mem
$1 = {offset = 35, end = 0, size = 32, allocated_size = 0, bus_addr = 593808606253023233, key = 0, bound = 0, agp_offset = 4294967295, tiling = TILE_NONE, 
  fence_nr = 0, pitch = 0, name = 0x0, next = 0x0, prev = 0x40}
(gdb)