[nelson01]

Okay, I made some changes I now I get sync that's on par with my CE devices using my HTPC.

Here's what's different:

1. Replaced ATI HD6450 with HD6570
2. Updated to the Catalyst 12.8 driver
3. Installed XBMC 12.0 Frodo Alpha 2
4. Adding the advancedsettings.xml file below

Code:

<advancedsettings>
   <video>
      <adjustrefreshrate>
         <override>
            <fps>23.976</fps>      
            <refresh>23.976</refresh>
         </override>
         <override>
            <fps>24</fps>      
            <refresh>24</refresh>
         </override>
         <override>
            <fps>29.97</fps>
            <refresh>29.97</refresh>
         </override>
         <override>
            <fps>30</fps>
            <refresh>30</refresh>
         </override>
         <override>
            <fps>59.94</fps>      
            <refresh>59.94</refresh>
         </override>
         <override>
            <fps>60</fps>      
            <refresh>60</refresh>
         </override>
      </adjustrefreshrate>
   </video>
</advancedsettings>

I'm booting directly into XBMC as a shell and using a windows logon script to run CLIstart.exe (Catalyst Control Center). I've enabled all of the sync options in XBMC (sync to display, adjust refresh rate with a 4 second pause). I've wrestled with this for a long time and tried several hardware/software combos. It seems I've finally found one that works. Maybe it's the new Catalyst driver. I also noticed that it doesn't steal focus away from XBMC anymore (at least not yet). There is still some sync lost to propagation through the AVR, but it's the same as everything else that I have connected to it.