Bug#514395: LUT settings are not restored after switching to console.

[Michel Dänzer]

reassign 514395 xserver-xorg-core
kthxbye

On Wed, 2009-02-11 at 22:11 +0100, Kurt Roeckx wrote: 
> 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.

AFAICT the driver RandR 1.2 code just sets the LUT values passed in by
the X server, so I'm reassigning. If this still happens with
xserver-xorg-core from experimental, you may want to report it upstream.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer