Latitude E5540. Computer always connected to internet automatically with boot up. Then recently it started disconnecting every 24 hours for about 2 minutes, then it reconnected. Quite disturbing. So I changed roaming aggressiveness from medium to lowest, and unticked allow computer to turn off device to save power. These steps appear to have solved the disconnection issue, but now the boot up automatic wifi connection is gone and I have to make the connection manually! Anyone know of a fix for this?