Trying to set the BROADCAST_RGB option fails either in Xorg.conf or with xrandr: Xorg: [699959.322] (WW) intel(0): Option "BROADCAST_RGB" is not used xrandr: xrandr --output HDMI2 --set BROADCAST_RGB 0 X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 150 (RANDR) Minor opcode of failed request: 11 (RRQueryOutputProperty) Serial number of failed request: 33 Current serial number in output stream: 33 I took a look at the source code for the Xorg driver and couldn't find the option in the code, only the man page. So the result is that it is not possible to specify limited rgb. System info: libdrm: 2.4.23 kernel: 2.6.36-999-generic #201010311115 CPU/GFX: core i3 540 i915 driver: 2.14.0
Created attachment 43624 [details] [review] Add support for "Broadcast RGB" This will then expose the parameter through xrandr and I will remove the obsolete entry from the man page.
drm-intel-next commit e953fd7bb32f55309a96abd5ceba9cf68d221434 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Feb 21 22:23:52 2011 +0000 drm/i915: Add support for limited color range of broadcast outputs In order to prevent "crushed blacks" on TVs, the range of the RGB output may be limited to 16-235. This used to be available through Xorg under the "Broadcast RGB" option, so reintroduce support for KMS. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34543 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Thanks, I will give it a try as soon I get a chance.
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