[argyllcms] Re: Hardware (?) problems: Matrox G550 Dual DVI
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 21 Jul 2008 00:16:15 +1000
Volker Sauer wrote:
It's been exacerbated by the fact that there is no official means
for accessing the 2nd screen VideoLUTs when Xinerama is running,
even though it is possible in some cases.
In which cases is it possible? With which card/driver combinations?
If it's real Xinerama, rather than a faked up Xinerama, it tends
to work. Xinerama makes multiple X11 screens look like one
large screen by intercepting some of the X11 protocol to
the multiple screens, but it doesn't intercept the XF86VidMode
extension calls, so they are able to talk to the different
underlying screens VideoLUTs. If the Xinerama extension is faked
by the driver, it usually doesn't fake the multiple underlying
screens, XF86VidMode can't access them.
Graeme Gill.
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