Has anybody successfully installed 4 GB RAM in 1546/47/54 ? There appears to be contradictionary information in the marketing material - at least for the 1546/47: some technical specifications say a max. of 4GB is possible (as does the user manual), whereas in others the maximum is listed as 2GB.
In any event, I've tried installing 4 GB (2 x DDRII-667, PC2-5300) but it doesn't work: the machine hangs on startup and after a while a single beep occurs. Installing a single 2 GB SODIMM does work, while a combination of 1 GB and 2 GB SODIMMs does not work either.
The BIOS in my machine is 1.18. I have installed v. 1.22 from the xi1554 BIOS but it still doesn't work. So basically my question is whether a future BIOS/chipset driver will be able to support 4GB and if so, when this driver will be available ?