I have the same situation on two notebooks. That's really annonying, bacause I want to use Linux not Windows. But with Linux I have only 1.5h battery. If I use Windows7 I get up to 9-10h!! So, I use only Windows from now on.
Sony VAIO Z-Series VGN-Z11VN/B (updated Ubuntu 11.10 system)
ASUS 4830TG (clean 11.10 install from live CD)
Both have NVidia dedicated graphics cards + Intel gfx. The ASUS has NV optimus.
I have the same situation on two notebooks. That's really annonying, bacause I want to use Linux not Windows. But with Linux I have only 1.5h battery. If I use Windows7 I get up to 9-10h!! So, I use only Windows from now on.
Sony VAIO Z-Series VGN-Z11VN/B (updated Ubuntu 11.10 system)
ASUS 4830TG (clean 11.10 install from live CD)
Both have NVidia dedicated graphics cards + Intel gfx. The ASUS has NV optimus.