On Wed, Feb 11, 2009 at 06:55:15PM +0100, Michel D?nzer wrote:
> On Wed, 2009-02-11 at 18:35 +0100, Kurt Roeckx wrote:
> > >
> > > > or atleast get them restored when switching back to X.
> > >
> > > What method does dispwin use for changing the LUT settings?
> >
> > It uses this for randr 1.2:
> > XRRCrtcGamma *crtcgam;
> >
> > debugr("Setting gamma using Randr 1.2\n");
> >
> > if ((crtcgam = XRRAllocGamma(r->nent)) == NULL) {
> > debugr(" XRRAllocGamma failed\n");
> > return 1;
> > }
> >
> > for (i = 0; i < r->nent; i++) {
> > crtcgam->red[i] = vals[0][i];
> > crtcgam->green[i] = vals[1][i];
> > crtcgam->blue[i] = vals[2][i];
> > }
> >
> > XRRSetCrtcGamma(p->mydisplay, p->crtc, crtcgam);
> > XSync(p->mydisplay, False); /* Flush the change
> > out */
> >
> > XRRFreeGamma(crtcgam);
> >
> > Else it would use XF86VidModeSetGammaRamp()
>
> At least with RandR 1.2, I suspect this could be an issue in the X
> server rather than the driver.
I've tried using xgamma (from x11-xserver-utils 7.3+5) and then the setting
are kept. xgamma uses the XF86VidModeSetGamma() call.
I've rebuild dispwin so it uses the XF86VidModeSetGammaRamp() call instead
and then the settings are also kept.
Kurt
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