Mailinglist Archive: radeonhd (699 mails)

[Jean Delvare <jdelvare@xxxxxxx>]

Hi Pierre,

Le jeudi 01 novembre 2007, Pierre Ossman a écrit :
> It seems that Lenovo doesn't really believe in the concept of truth
> in marketing. The panel advertised as 24-bit is actually 18-bit (they
> claim 16.7 M colors, not 16.2 M or the actual 262 k). To compensate,
> there is some dithering involved, and seems to give an effect most
> people describe as "sparkling".    
>
> This grainy, or sparkly, appearance is a bit annoying and might be
> the reason why I perceive this display as straining. So I'd like to
> disable it and see if that makes me a happy camper.  
>
> I've been fiddling with the register LVTMA_BIT_DEPTH_CONTROL,
> disabling the relevant dither bits there. That does indeed remove
> so much of the dithering that you can start seeing the banding
> caused by the 18-bit truncation. Unfortunately, the display is
> still grainy, so something is still active.    

Can't you just set the radeonhd driver to 15-bit or 16-bit depth mode?

-- 
Jean Delvare
Suse L3
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