diff -r 6a087ccc0d62 sys/src/9/pc/etheriwl.c
--- a/sys/src/9/pc/etheriwl.c	Thu Oct 15 10:30:40 2020 +0200
+++ b/sys/src/9/pc/etheriwl.c	Sun Oct 18 00:59:07 2020 -0400
@@ -2892,6 +2892,7 @@
 	if((err = cmd(ctlr, 90, c, 4+4*16)) != nil)
 		return err;
 
+	tsleep(&up->sleep, return0, nil, 10);
 	if(ctlr->type != Type5150){
 		/* calibrate crystal */
 		memset(c, 0, sizeof(c));