Hi,

I'm using r6xx-r7xx-support branch (commit 3f8b6ecc), with EXA AccelMethod.

Recently when I want to save file in openoffice I typed 1 letter and my Xorg freeze.
Luckily I've got sshd started and I could attach strace and gdb to it.

gdb backtrace:
#4  0x00007fbb0e9433c7 in R600OverlapCopy (pDst=0x861950, srcX=820, srcY=571, dstX=820, dstY=571, w=16, h=19) at r600_exa.c:816
        pScrn = (ScrnInfoPtr) 0x817bf0
        rhdPtr = (RHDPtr) 0x817810
        accel_state = (struct r6xx_accel_state *) 0x83c360
        dst_pitch = 1408
        dst_offset = 3489693696
        i = 0
        hchunk = 0
        vchunk = 0
#5  0x00007fbb0e9437af in R600Copy (pDst=0x861950, srcX=820, srcY=571, dstX=820, dstY=571, w=16, h=19) at r600_exa.c:875
        pScrn = (ScrnInfoPtr) 0x817bf0
        rhdPtr = (RHDPtr) 0x817810
        accel_state = (struct r6xx_accel_state *) 0x83c360

In frame #4 hchunk == 0, so this loop:
815 for (i = 0; i < w; i += hchunk) {
816     R600DoPrepareCopy(pScrn,
817          dst_pitch, pDst->drawable.width, pDst->drawable.height, 
             dst_offset, pDst->drawable.bitsPerPixel,
818          dst_pitch, pDst->drawable.height, dst_offset,
             pDst->drawable.bitsPerPixel,
819          accel_state->rop, accel_state->planemask);
821     R600AppendCopyVertex(pScrn, srcX + i, srcY, dstX + i, dstY, hchunk, h);
822     R600DoCopy(pScrn);
823 }

is unending.
I dunno how R600OverlapCopy() should work when (srcX == dstX) && (srcY == dstY), so no patch. Sorry :(