Hi, My kernel version is v4.4, and I have built drivers/staging/dgnc/dgnc.ko. I change to *dir*/drivers/staging/dgnc and do like this: sudo insmod ./dgnc.ko sudo lsmod | grep dgnc sudo rmmod ./dgnc sudo insmod ./dgnc.ko After I re-insmod the dgnc module, my laptop is breakdown. My OS is debian 8.0. Is there a bug in dgnc.ko or something wrong with my OS or kernel. If there is a bug, How can I find it? Thanks. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies