Commit 063eb674 authored by Keith Packard's avatar Keith Packard

Patch brown-bag fix for bug 19017 (scrn->virtualX/virtualY 0 before PreInit)

When a driver uses a crtc during device detection, the scrn has not yet been
configured and virtualX/virtualY are still zero. This caused the X server
to try and allocate a shadow frame buffer, which couldn't work.

Detect this by checking for zero virtualX/virtualY values.
Signed-off-by: Keith Packard's avatarKeith Packard <>
parent fde2f961
......@@ -366,6 +366,12 @@ xf86CrtcFitsScreen (xf86CrtcPtr crtc, struct pict_f_transform *crtc_to_fb)
ScrnInfoPtr pScrn = crtc->scrn;
BoxRec b;
/* When called before PreInit, the driver is
* presumably doing load detect
if (pScrn->virtualX == 0 || pScrn->virtualY == 0)
return TRUE;
b.x1 = 0;
b.y1 = 0;
b.x2 = crtc->mode.HDisplay;
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