Bug 92178

Created attachment 118514 [details]
vbios.rom with nouveau loaded

Created attachment 120457 [details]
Xorg log of using xf86-video-nv

The interesting bits from the log:

[   128.852] (II) NV(0): I2C bus "DDC" initialized.
[   128.852] (II) NV(0): Probing for EDID on I2C bus A...
[   128.852] (II) NV(0): I2C device "DDC:ddc2" registered at address 0xA0.
[   128.855] (II) NV(0):   ... none found
[   128.855] (II) NV(0): Probing for EDID on I2C bus B...
[   129.092] (II) NV(0):   ... none found
[   129.092] (--) NV(0): CRTC 1 is currently programmed for DFP
[   129.092] (II) NV(0): Using DFP on CRTC 1
[   129.092] (--) NV(0): Panel size is 1400 x 1050
[   129.092] (II) NV(0): NOTE: This driver cannot reconfigure the BIOS-programmed size.
[   129.092] (II) NV(0): These dimensions will be used as the panel size for mode validation.
[   129.092] (II) NV(0): Panel is LVDS


Note that the xf86-video-nv recognizes device id 112 (and a boatlod of others) as mobile, and for those it forces pNv->FlatPanel = 1, which in turn causes:

             if(pNv->FlatPanel) pNv->CRTCnumber = 1;

    if(pNv->FlatPanel && !pNv->Television) {
       pNv->fpWidth = pNv->PRAMDAC[0x0820/4] + 1;
       pNv->fpHeight = pNv->PRAMDAC[0x0800/4] + 1;
       pNv->fpVTotal = pNv->PRAMDAC[0x804/4] + 1;
       pNv->fpSyncs = pNv->PRAMDAC[0x0848/4] & 0x30000033;
       xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Panel size is %i x %i\n",
                  pNv->fpWidth, pNv->fpHeight);
       xf86DrvMsg(pScrn->scrnIndex, X_INFO, "NOTE: This driver cannot "
                  "reconfigure the BIOS-programmed size.\n");
       xf86DrvMsg(pScrn->scrnIndex, X_INFO, "These dimensions will be used as "
                  "the panel size for mode validation.\n");
    }

    if(monitorA)
      xf86SetDDCproperties(pScrn, monitorA);

    if(!pNv->FlatPanel || (pScrn->depth != 24) || !pNv->twoHeads)
        pNv->FPDither = FALSE;

    pNv->LVDS = FALSE;
    if(pNv->FlatPanel && pNv->twoHeads) {
        pNv->PRAMDAC0[0x08B0/4] = 0x00010004;
        if(pNv->PRAMDAC0[0x08B4/4] & 1)
           pNv->LVDS = TRUE;
        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Panel is %s\n", 
                   pNv->LVDS ? "LVDS" : "TMDS");
    }


and later on

    if(pNv->FlatPanel == 1) {
       vertStart = vertTotal - 3;  
       vertEnd = vertTotal - 2;
       vertBlankStart = vertStart;
       horizStart = horizTotal - 5;
       horizEnd = horizTotal - 2;   
       horizBlankEnd = horizTotal + 4;
       if(pNv->Architecture == NV_ARCH_30)
           horizTotal += 2;
    }

We should figure out what all this maps to in nouveau and how to properly fake it.

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/219.