On 16 January 2012 22:12, Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > > On Mon, 16 Jan 2012 21:50:22 +0000 > Andy Burns <xorg.lists at burns.me.uk> wrote: > > > Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > > > > > Andy Burns <xorg.lists at burns.me.uk> wrote: > > > > > > There is a way to configure the gamut to be compressed (default) or > > > expanded (up to 255). ?But that's not exposed either. > > > > I see the following from the man page > > > > "DVI/HDMI outputs. Avaliable common properties include: > > BROADCAST_RGB - method used to set RGB color range(full range 0-255, > > not full range 16-235) > > Adjusting this propertie allows you to set RGB color range on each > > channel in order to match HDTV requirment(default 0 for full range). > > Setting 1 means RGB color range is 16-235, 0 means RGB color range is > > 0-255 on each channel. > > SDVO and DVO TV outputs are not supported by the driver at this time." > > > > Does that mean I *can* toggle the studio colour range on the fly, or > > is the doc wrong? > > Ah maybe we do expose it; I'm out of date. ?Yeah that should change the > color range handling... Hi - I just wanted to revisit this particular topic. Firstly I should say I'm subscribed to the list to try and stay up to date with the cutting edge you guys are working on. I'm not a developer or anything, just an interested user. Okay so back to this question of broadcast rgb/limited/full range colour. I'm not so sure it is working at all under Sandybridge. I use XBMC under Linux (Ubuntu) and do not see any difference in the picture when I do either of the following: 1) Set BROADCAST_RGB = 1 (or 0) in the xorg.conf - in fact the X log shows the setting is ignored seemingly wherever I put it 2) type on the command line,?xrandr -d :0 --output <OUTPUT HERE> --set "Broadcast RGB" "Limited 16:235" and: 3) type?on the command line,?xrandr -d :0 --output <OUTPUT HERE> --set "BROADCAST_RGB" 1 - this just errors as previously noted here and in other related topics It seems to me it outputs full range colour regardless of this setting - are the above methods "potentially" correct? As such it limits the usefulness of the platform to htpc users - under Linux that is. Under Windows it seems to automatically detect that a TV is connected and switch to 16-235 (using EDID info and manufacturer data maybe?). Is it at all possible to manage this under Linux in a similar way maybe, any future plans perhaps? This is, aside from the fractional framerate issue probably the last major issue limiting the platform under Linux and in my case XBMC. For reference I've tried this on various kernels from 3.0 through to the 3.3 RC's. The hardware in question is a Pentium G620T on an Intel DH67CF motherboard. Also for reference in case you guys are interested the following topic at XBMC's forum details setting up the platform under Linux, http://forum.xbmc.org/showthread.php?t=114368 including my comments about full/limited range colour.
