Read http://forums.cnet.com/5208-7587_102-0.html?forumID=69&threadID=271360&messageID=2699006#2699006 and take note of step 3.
But first I bet you'll dismiss this because you don't have a HP. But I digress here. There are drivers you need to install such as that in step 3 from Toshiba to get the sound to work.
The notebook came with Vista which didn't work properly at all, it was extremely slow so I wanted to go for either Windows XP or some Linux distribution. I tried a Windows XP SP2 CD first but it didn't work because it couldn't detect any hard disks. Then I used a Windows XP SP3 ISO and added the Intel SATA controller drivers to it and burned it. It actually worked and the operating system runs fine and much faster now. But I have a problem with the sound. I installed the chip set utility and the audio drivers from http://eu.computers.toshiba-europe.com/cgi-bin/ToshibaCSG/download_drivers_bios.jsp?service=EU (csutil-20071120144450.zip, sound-20071120150900.zip) for this model but it still fails to detect it and there two items with a question mark listed in device manager:
I have installed the WLAN drivers etc, I'm not quite sure what the "unknown device" could be, I suppose the PCI one is that Realtek sound card.
Would somebody please help me out?