So you are successful in getting some of your units to speak to and load the fog splash screen, but a particular model of Toshiba minis will not connect?
Where does it fail? Do you receive a PXE error code when it attempts to pull the information, or is it skipping the PXE load all together?
Some machines have to have a specific driver built into the kernel before it can communicate properly. It doesn’t take much time and it is EXTREMELY easy to do. There is a wonderful walkthrough I will look for while I wait for you to answer my questions.
If I am understanding this correctly so far, your Toshiba Mini laptops are not receiving the TFTPboot information and are not displaying the fog splash screen therefore you are unable to register or image them and it continues to boot off the hard drive.
One other quick question. You said you had an Ubuntu server, what Ubuntu version are you using? 10.04? 11.04? 12.10?
Have there been any reboots of the server? there are some versions of Linux that have problems restarting some of the services after a reboot, we’ll cover that if necessary.