Comment 75 for bug 132271

Just a reference for people searching for my laptop model (Ahtec Signal X-9600, Quanta Z500N series, Quanta ZW9):

After years of hesitation -I didn't want to brick my laptop with an incorrect BIOS!- I updated it to version Q3B21 (mine was Q3A12)

I found the BIOS update at:
http://www.lamsystems.com/drivers/notebook/zw9.asp
The file is 9AQ3B21.zip

Turns out Ahtec shipped the laptop with a BIOS incompatible with the Dothan CPU. The PC worked, but features like Speedstep and C2 power state were not working. With the new BIOS they work perfectly and the laptop is quieter than ever!