I modified libxrandr to return the actual error code returned from
XRRSetCrtcConfig():
--- libxrandr-1.5.1.orig/src/XrrCrtc.c
+++ libxrandr-1.5.1/src/XrrCrtc.c
@@ -155,9 +155,10 @@ XRRSetCrtcConfig (Display *dpy,
req->mode = mode;
req->rotation = rotation;
Data32 (dpy, outputs, noutputs << 2);
+ int ret_code = _XReply (dpy, (xReply *) &rep, 0, xFalse);
+ if (ret_code != 0)
+ rep.status = ret_code;
- if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
- rep.status = RRSetConfigFailed;
UnlockDisplay (dpy);
SyncHandle ();
return rep.status;
And it shows:
xfce4-settings(displays): Configuring CRTC 79.
xfce4-settings(displays): Applying changes to CRTC 79.
xfce4-settings(displays): Applying CRTC 79 Transform: x=0.000000 y=0.000000,
filter=bilinear.
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.650:
XRRSetCrtcConfig()=1, sleeping
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.655:
XRRSetCrtcConfig()=1, sleeping
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.657:
XRRSetCrtcConfig()=1, sleeping
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.658:
XRRSetCrtcConfig()=1, sleeping
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.660:
XRRSetCrtcConfig()=1, sleeping
(xfsettingsd:7726): xfsettingsd-WARNING **: 12:44:13.661: Failed to configure
CRTC 79 XRRSetCrtcConfig()=1.
xfce4-settings(displays): Configuring CRTC 80.
(xfsettingsd:7726): xfsettingsd-CRITICAL **: 12:44:13.662: Failed to apply
display settings
xfce4-settings(displays): RRScreenChangeNotify event received.
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https://bugs.launchpad.net/bugs/1759950
Title:
Lid-close suspend: blank screen when switching to user session
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