Re: Gamma correction on G4 PowerBook
On Thu, 2003-09-25 at 22:02, Vincent Lefevre wrote:
>
> On 2003-09-15 17:31:54 +0200, Michel Dänzer wrote:
> > On Mon, 2003-09-15 at 00:32, Vincent Lefevre wrote:
> > > On my G4 PowerBook, this isn't much contrast for dark colors, whether
> > > I use the LCD or a CRT monitor connected to it. When I look at the
> > > same desktop from my RISC OS computer via a VNC client (and using the
> > > same CRT monitor), images look OK. It seems that the PowerBook doesn't
> > > do gamma correction by default. How can I do that? I've tried to add
> > > a -gamma option in /etc/X11/xinit/xserverrc, but images look terrible
> > > (probably saturated, or as if I had a palette with few colors).
> >
> > Have you played with xgamma yet?
>
> I've just tried, but it works incorrectly. Instead of getting
> an image of better quality, the image gets very ugly.
Maybe you need a tool which gives you even more control than xgamma?
> I could compare with the hardware gamma correction of my Risc PC (using
> the VNC client on this machine), and there is a huge difference.
FWIW, this is hardware gamma correction as well. I was going to say that
the panel might simply not meet your expectations, but I just saw above
that the problem happens with the CRT as well...
--
Earthling Michel Dänzer \ Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast \ http://svcs.affero.net/rm.php?r=daenzer
Reply to: