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vgavesa: fix race

--- a/sys/src/9/pc/vgavesa.c

+++ b/sys/src/9/pc/vgavesa.c

@@ -265,6 +265,10 @@

 {

 	vesactl = Cdisable;

 	wakeup(&vesar);

+

+	/* wait for vesaproc to finish */

+	qlock(&vesaq);

+	qunlock(&vesaq);

 }

 static void

-- 

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