(gdb) bt full
#0  0x4eb6e08c in memcpy () from /lib/i686/cmov/libc.so.6
No symbol table info available.
#1  0xb7c74edb in fbBlt (srcLine=0xb26b2f68, srcStride=1400, srcX=0, dstLine=0x2b0e00, dstStride=1408, dstX=0, width=2112,
    height=517, alu=3, pm=4294967295, bpp=32, reverse=0, upsidedown=0) at ../../fb/fbblt.c:95
        i = 0
        src = (
    CARD8 *) 0xb26b2f68 "·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ·\226Wÿ"...
        dst = <value optimized out>
        src = <value optimized out>
        dst = <value optimized out>
        leftShift = <value optimized out>
        rightShift = <value optimized out>
        startmask = <value optimized out>
        endmask = <value optimized out>
        bits = <value optimized out>
        bits1 = <value optimized out>
        nmiddle = <value optimized out>
        destInvarient = <value optimized out>
        startbyte = <value optimized out>
        endbyte = <value optimized out>
        _ca1 = <value optimized out>
        _cx1 = <value optimized out>
        _ca2 = <value optimized out>
        _cx2 = <value optimized out>
#2  0xb7c8e924 in fbOddTile (dst=0x2b0e00, dstStride=1408, dstX=0, width=2112, height=0, tile=0xb2406008, tileStride=1400,
    tileWidth=44800, tileHeight=1050, alu=3, pm=4294967295, bpp=32, xRot=0, yRot=-501) at ../../fb/fbtile.c:152
        tileX = <value optimized out>
        tileY = <value optimized out>
        widthTmp = 0
        h = 517
        w = 2112
        x = 0
        y = 0
#3  0xb7c8e9ec in fbTile (dst=0x2b0e00, dstStride=1408, dstX=0, width=2112, height=517, tile=0xb2406008, tileStride=1400,

    tileWidth=-1301598360, tileHeight=1050, alu=3, pm=4294967295, bpp=32, xRot=0, yRot=66) at ../../fb/fbtile.c:200
No locals.
#4  0xb7c8f2e6 in fbFillRegionTiled (pDrawable=0x826f730, pRegion=0x8a85290, pTile=0x824b018) at ../../fb/fbwindow.c:298
        _pPix = <value optimized out>
        dst = (FbBits *) 0x0
        dstStride = 1408
        dstBpp = 32
        dstXoff = 0
        dstYoff = 0
        tile = (FbBits *) 0xb2406008
        tileStride = 1400
        tileHeight = 1050
        n = 0
        pbox = (BoxPtr) 0x8a85290
        xRot = 0
        yRot = 0
#5  0xb7c8f5d8 in fbPaintWindow (pWin=0x826f730, pRegion=0x8a85290, what=0) at ../../fb/fbwindow.c:334
        pBgWin = <value optimized out>
#6  0xb7c2bd16 in XAAPaintWindow (pWin=0x826f730, prgn=0x8a85290, what=0) at ../../../../hw/xfree86/xaa/xaaPaintWin.c:192
        pScreen = (ScreenPtr) 0x8219668
        infoRec = (XAAInfoRecPtr) 0x82358c0
        nBox = 1
        pBox = (BoxPtr) 0x8a85290
        fg = <value optimized out>
        pPix = (PixmapPtr) 0x81688e0
#7  0x08169c4f in damagePaintWindow (pWindow=0x826f730, prgn=0x8a85290, what=0) at ../../../miext/damage/damage.c:1650
        pScreen = (ScreenPtr) 0x8219668
        pScrPriv = (DamageScrPrivPtr) 0x8249590
#8  0x081185d6 in miWindowExposures (pWin=0x826f730, prgn=0x8a85290, other_exposed=0x0) at ../../mi/miexpose.c:565
        expRec = {extents = {x1 = -2256, y1 = 2086, x2 = 0, y2 = 0}, data = 0x0}
        exposures = (RegionPtr) 0x8a85290
#9  0x080d707c in xf86XVWindowExposures (pWin=0x826f730, reg1=0x8a85290, reg2=0x0)
    at ../../../../hw/xfree86/common/xf86xv.c:1056
        pScreen = (ScreenPtr) 0x8219668
        WinPriv = (XF86XVWindowPtr) 0x0
        pPrev = (XF86XVWindowPtr) 0x889efb8

        pPriv = <value optimized out>
        AreasExposed = 0
#10 0x0812fdf7 in miHandleValidateExposures (pWin=0x826f730) at ../../mi/miwindow.c:470
        pChild = <value optimized out>
        val = (ValidatePtr) 0x8a85290
        WindowExposures = (WindowExposuresProcPtr) 0x80d6fe0 <xf86XVWindowExposures>
#11 0x080ce8b1 in xf86SetRootClip (pScreen=0x8219668, enable=1) at ../../../../hw/xfree86/common/xf86Helper.c:1210
        pWin = (WindowPtr) 0x826f730
        pChild = <value optimized out>
        anyMarked = 1
        pOldClip = (RegionPtr) 0x0
        bsExposed = (RegionPtr) 0x1
        dosave = 0
        pLayerWin = (WindowPtr) 0x8882f68
#12 0xb7c153a3 in XAAEnableDisableFBAccess (index=0, enable=1) at ../../../../hw/xfree86/xaa/xaaInit.c:778
        pScreen = (ScreenPtr) 0x8219668
        infoRec = (XAAInfoRecPtr) 0x82358c0
        pScreenPriv = (XAAScreenPtr) 0x821ae78
#13 0xb7c5efa6 in xf86CursorEnableDisableFBAccess (index=0, enable=1) at ../../../../hw/xfree86/ramdac/xf86Cursor.c:210
        pScreen = (ScreenPtr) 0x8219668
        ScreenPriv = (xf86CursorScreenPtr) 0x821ae08
#14 0x080e1e46 in xf86RandRSetMode (pScreen=0x8219668, mode=0x821b9c0, useVirtual=0, mmWidth=<value optimized out>,
    mmHeight=<value optimized out>) at ../../../../hw/xfree86/common/xf86RandR.c:210
        scrp = (ScrnInfoPtr) 0x82047f8
        randrp = (XF86RandRInfoPtr) 0x821afc8
        oldVirtualX = 1400
        oldVirtualY = 1050
        pRoot = (WindowPtr) 0x826f730
        ret = 0
#15 0x080e20a9 in xf86RandRSetConfig (pScreen=0x8219668, rotation=1, rate=85, pSize=0xbfe81da0)
    at ../../../../hw/xfree86/common/xf86RandR.c:268
        scrp = (ScrnInfoPtr) 0x82047f8
        randrp = (XF86RandRInfoPtr) 0x821afc8
        mode = (DisplayModePtr) 0x821b9c0
        px = <value optimized out>
        py = <value optimized out>

        useVirtual = 0
        oldRotation = 1
#16 0x08160e6c in RRCrtcSet (crtc=0x8882d28, mode=0x8883318, x=0, y=0, rotation=1, numOutputs=1, outputs=0xbfe81e64)
    at ../../randr/rrcrtc.c:323
        size = {id = 16, width = 1280, height = 1024, mmWidth = 320, mmHeight = 240, nRates = 1, pRates = 0xbfe81db4}
        rate = {rate = 85, mode = 0x98}
        ret = <value optimized out>
        pScreen = (ScreenPtr) 0x8219668
#17 0x081659d1 in ProcRRSetScreenConfig (client=0x89cd5b8) at ../../randr/rrscreen.c:909
        rep = {type = 96 '`', status = 30 '\036', sequenceNumber = 49128, length = 0, newTimestamp = 947119684,
  newConfigTimestamp = 1, root = 144496312, subpixelOrder = 7848, pad4 = 49128, pad5 = 135565143, pad6 = 144496056}
        n = <value optimized out>
        pScreen = (ScreenPtr) 0x8219668
        pScrPriv = (rrScrPrivPtr) 0x825a9e0
        configTime = <value optimized out>
        time = {months = 0, milliseconds = 947770070}
        i = <value optimized out>
        rotation = 1
        has_rate = 1
        output = (RROutputPtr) 0x88830d0
        mode = (RRModePtr) 0x8883318
        pData = (RR10DataPtr) 0x8987550
        pSize = <value optimized out>
#18 0x0815f655 in ProcRRDispatch (client=0x42) at ../../randr/randr.c:485
No locals.
#19 0x081491be in XaceCatchExtProc (client=0x89cd5b8) at ../../Xext/xace.c:299
        major = 156
        ext = <value optimized out>
#20 0x080880cb in Dispatch () at ../../dix/dispatch.c:457
        result = <value optimized out>
        client = (ClientPtr) 0x89cd5b8
        nready = 0
        start_tick = 8760
#21 0x0806fef9 in main (argc=4, argv=0xbfe823e4, envp=Cannot access memory at address 0x4a
) at ../../dix/main.c:477
        pScreen = <value optimized out>
        i = 1

        error = 134675078
        xauthfile = <value optimized out>
        alwaysCheckForInput = {0, 1}
(gdb)