Excerpts from Julien Cristau's message of Wed Jul 21 19:06:06 +0200 2010:
> On Wed, Jul 21, 2010 at 18:59:40 +0200, Michal Suchanek wrote:
> 
> > Excerpts from Julien Cristau's message of Wed Jul 21 17:38:49 +0200 2010:
> > > On Wed, Jul 21, 2010 at 16:52:21 +0200, Michal Suchanek wrote:
> > > 
> > > > Package: x11-xserver-utils
> > > > Version: 7.5+1
> > > > Severity: normal
> > > > File: /usr/bin/xgamma
> > > > 
> > > > 
> > > > In multi-screen configuraion the gamma can be set only on the first
> > > > screen. It is not obvious how to set gamma on the other screen(s), the
> > > > format of the -s option is not specified.
> > > > 
> > > I'm not sure what you're trying to say.  To set gamma on screen 0, you
> > > use xgamma -screen 0. 
> > 
> > Which sets gamma on the secondary screen when it is on or on the
> > primary screen when the secondary is off.
> > 
> > > To set gamma on screen 1, use xgamma -screen 1.
> > 
> > Which gives an X error:
> > X Error of failed request:  BadValue (integer parameter out of range for
> > operation)
> >   Major opcode of failed request:  129 (XFree86-VidModeExtension)
> >   Minor opcode of failed request:  16 (XF86VidModeGetGamma)
> >   Value in failed request:  0x17
> >   Serial number of failed request:  12
> >   Current serial number in output stream:  12
> > 
> This means you only have one screen.  You seem to be confused about what
> 'screen' means in an X context.  It's not the same thing as a physical
> monitor, in particular when using randr or xinerama.

I do use Xinerama to join the two screens together.

Still xgamma is incapable of setting gamma for both monitors, whatever
they are called.

Thanks

Michal
-- 
Michal Suchánek
michal.sucha...@ruk.cuni.cz
tel 224491810 fax 224491594
Univerzita Karlova v Praze
Ústav Výpočetní Techniky
Ovocný trh 3
Praha 1



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