On 26/03/2012, at 7:07 PM, ltsp-discuss-requ...@lists.sourceforge.net wrote:
>> 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. In bright light, with large areas of colour, the human eye can just distinguish 24bit (16 million colours). Rather similar to SD and HD. 100cm or so screen at 3 meters and the eye cannot distinguish (angular resolution of human eye) Can your monitor resolve 16 vs 24 colour? maybe but maybe not. There is no reason to choose 32 or 24 over 16. If you do see a difference it is hardware rather than software. (you may need to take 16-24 with a pinch of salt, but not 32-24) Also to be considered is how you hardware resolves the colours 5+5+6 11+11+10 ? 24 is easy and nice 8+8+8. James ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
