diff --git a/profiles/default/linux/amd64/13.0/backbone/desktop/package.mask b/profiles/default/linux/amd64/13.0/backbone/desktop/package.mask
index 152c9fbd..2a14bf17 100644
--- a/profiles/default/linux/amd64/13.0/backbone/desktop/package.mask
+++ b/profiles/default/linux/amd64/13.0/backbone/desktop/package.mask
@@ -32,3 +32,6 @@
 =x11-drivers/nvidia-drivers-340.24
 =x11-drivers/nvidia-drivers-343.13
 =x11-drivers/nvidia-drivers-343.13-r1
+
+# Optimus: cann't 'rmmod/modprobe -r' after ~1000 times of 'primus ls' runs.
+=x11-drivers/nvidia-drivers-340.32