Le lundi 26 mars 2012 09:05:42 Alkis Georgopoulos, vous avez écrit :
> By default, X_COLOR_DEPTH is 32 for thin clients, which means that a
> 320x240 youtube video needs 73.728.000 bps bandwidth (30 fps, 32 bpp).
> 
> Setting X_COLOR_DEPTH=16 for thin clients makes that video need exactly
> half the bandwidth, i.e. 36.864.000 bps.
> 
> Of course that doesn't only affect videos. Any thin clients screen
> updates need half the bandwidth with X_COLOR_DEPTH=16.
> 
> Less bandwidth means faster responses, less CPU usage (especially with
> the default LDM_DIRECTX=False), and support for more clients with the
> same CPU/LAN constrains.
> 
> So I propose a change in upstream LTSP to set X_COLOR_DEPTH=16 by
> default, if:
>   * LTSP_FATCLIENT is not set (fat clients would still default to 32),
>   * LOCAL_APPS_MENU is not set (so 32 for localapps browsers too),
>   * X_COLOR_DEPTH is not set at all (so X_COLOR_DEPTH="" in lts.conf
>     reverts to the old behavior).
> 
> 
> Is that what most LTSP users would like? Comments, please... :)
> 
> If not, then I'll implement an X_COLOR_DEPTH=auto instead, which would
> give the above behavior (16 on thins, 32 on fats/localapps) only when
> requested from lts.conf.

I allways set X_COLOR_DEPTH=16, to save bandwith and CPU. Users never 
complains, even when browsing high quality pictures (on low quality 
screens...).  
I aprove.

Xavier
xav...@alternatif.org - 06 29 23 16 59 - 09 54 21 52 22

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