Freeze on shutdown problem
#16
Good news, I can not get it to lock up now.

Bad news, I did not change anything.

If I am able to get it consistently locking up again I will try the fix.
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#17
My summary of issues related to Aero Yes or No / Full screen Window Yes or No / Auto-adjust refresh rate Yes or No / Vsync.

In the table below you'll see why I ended up turning off Aero, because not only does it cause hang on exit, but also in combination with Auto-adjust refresh does it cause unwatchable low FPS material if switching from 50/60p to 24p (in full hd). Note that this could all be due to the rather limited power/memory of the nVidia ION chip.

In the end the only good combination is Aero OFF + True Full Screen. In case I use "Auto-Adjust refresh rate", I also check "Sync playback to display" to get good audio synchronization (but that's optional).

Code:
nVidia ION - Atom 330 - xbmc 10.0 Dharma - Desktop resolution = 1080p 50 or 60 Hz
                            
Aero     Full-   Auto-    Vsync    Hangs     Tearing Unwatchable,
ON?    screen     adjust         on         Low ~5 FPS
        Window?    refresh?    exit?        when switch to 24p?
                
YES    YES    YES    Always    X         X
YES    YES    NO    Always    X         
YES    NO    YES    Always    X         X
YES    NO    NO    Always    X         
NO    YES    YES    Always         X    
NO    YES    NO    Always         X    
NO    NO    YES    Always              
NO    NO    NO    Always
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#18
Hmm.. I might have found the reason for my hang-ups. I had over-scan turned on (unknowingly) on my TV, and compensated this by applying under-scan in my graphics driver. After realising my mistake, I turned aero on, and so far the problem hasn't shown up. Will report back here in a day or two.

/J
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#19
The problem has indeed disappeared! I am now a happy camper... Smile
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