[Bug 76146] intel-virtual-output virtual screens behaving strangely.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76146

--- Comment #15 from Chris Wilson <chris at chris-wilson.co.uk> ---
Slightly safer:

diff --git a/tools/virtual.c b/tools/virtual.c
index 8b8d511..2d18aa4 100644
--- a/tools/virtual.c
+++ b/tools/virtual.c
@@ -510,7 +510,18 @@ static int clone_update_modes__randr(struct clone *clone)
                }
        }

-       clone->dst.rr_crtc = from_info->crtc;
+       /* Disable the remote output */
+       if (from_info->crtc != clone->dst.rr_crtc) {
+               XRRPanning panning;
+
+               DBG(("%s(%s-%s): disabling active CRTC\n", __func__,
+                    DisplayString(clone->dst.dpy), clone->dst.name));
+               XRRSetCrtcConfig(clone->dst.dpy, from_res, from_info->crtc,
CurrentTime,
+                               0, 0, None, RR_Rotate_0, NULL, 0);
+               XRRSetPanning(dst->dpy, res, from_info->crtc, memset(&panning,
0, sizeof(panning)));
+
+               clone->dst.rr_crtc = 0;
+       }

        /* Clear all current UserModes on the output, including any active ones
*/
        if (to_info->crtc) {

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