diff --git a/gui-x11/screen.c b/gui-x11/screen.c
index 17ad260..03a97dc 100644
--- a/gui-x11/screen.c
+++ b/gui-x11/screen.c
@@ -116,7 +116,9 @@ screeninit(void)
 
 	memimageinit();
 	terminit();
+	drawqlock();
 	flushmemscreen(gscreen->r);
+	drawqunlock();
 }
 
 uchar*
@@ -1115,9 +1117,12 @@ xselect(XEvent *e, Display *xd)
 	XSelectionRequestEvent *xe;
 	Atom a[4];
 
+	if(e->xany.type != SelectionRequest)
+		return;
+
 	memset(&r, 0, sizeof r);
 	xe = (XSelectionRequestEvent*)e;
-if(0) fprint(2, "xselect target=%d requestor=%d property=%d selection=%d\n",
+if(0) iprint("xselect target=%d requestor=%d property=%d selection=%d\n",
 	xe->target, xe->requestor, xe->property, xe->selection);
 	r.xselection.property = xe->property;
 	if(xe->target == targets){
@@ -1135,9 +1140,12 @@ if(0) fprint(2, "xselect target=%d requestor=%d property=%d selection=%d\n",
 			8, PropModeReplace, (uchar*)clip.buf, strlen(clip.buf));
 		qunlock(&clip.lk);
 	}else{
+		iprint("get %d\n", xe->target);
 		name = XGetAtomName(xd, xe->target);
-		if(strcmp(name, "TIMESTAMP") != 0)
-			fprint(2, "%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)xe->target);
+		if(name == nil)
+			iprint("XGetAtomName failed\n");
+		else if(strcmp(name, "TIMESTAMP") != 0)
+			iprint("%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)xe->target);
 		r.xselection.property = None;
 	}
 
diff --git a/kern/term.c b/kern/term.c
index f1e93ea..b582e88 100644
--- a/kern/term.c
+++ b/kern/term.c
@@ -55,6 +55,7 @@ screenwin(void)
 	char *greet;
 	Memimage *grey;
 
+	drawqlock();
 	back = memwhite;
 	conscol = memblack;
 	memfillcolor(gscreen, 0x444488FF);
@@ -88,6 +89,7 @@ screenwin(void)
 	curpos = window.min;
 	window.max.y = window.min.y+((window.max.y-window.min.y)/h)*h;
 	flushmemscreen(gscreen->r);
+	drawqunlock();
 }
 
 void
@@ -108,6 +110,7 @@ scroll(void)
 	Point p;
 	Rectangle r;
 
+	drawqlock();
 	o = 8*h;
 	r = Rpt(window.min, Pt(window.max.x, window.max.y-o));
 	p = Pt(window.min.x, window.min.y+o);
@@ -115,8 +118,8 @@ scroll(void)
 	r = Rpt(Pt(window.min.x, window.max.y-o), window.max);
 	memimagedraw(gscreen, r, back, ZP, nil, ZP, S);
 	flushmemscreen(gscreen->r);
-	
 	curpos.y -= o;
+	drawqunlock();
 }
 
 static void
@@ -181,11 +184,12 @@ screenputc(char *buf)
 static void
 termscreenputs(char *s, int n)
 {
-	int i;
+	int i, locked;
 	Rune r;
 	char buf[4];
 
 	lock(&screenlock);
+	locked = drawcanqlock();
 	while(n > 0){
 		i = chartorune(&r, s);
 		if(i == 0){
@@ -199,6 +203,8 @@ termscreenputs(char *s, int n)
 		s += i;
 		screenputc(buf);
 	}
+	if(locked)
+		drawqunlock();
 	screenflush();
 	unlock(&screenlock);
 }