[expert] Wrong memory detection

[Sarang Lakare]

Hi,

I am having problems with correct memory detection on two machines. Both 
machines have 1.5GB and LM8.0 on both of these detects 1.0GB. On one of the 
machines, 7.2 was installed earlier and it detected 1.5GB correctly.

1. ASUS K7V (VIA) Motherboard

2. SGI Zx10 workstation

I have tried appending mem=1536, mem=1500 etc but no help. Any ideas? 

Who is to blame? the linux kernel or the hardware vendor? 

thnaks!
sarang