I recently installed Ubuntu (32 bit) on this Dell Dimesion 2400. It had Windows 7 before. I ran Minecraft with the Java from the Ubuntu Software Center. It can start up perfectly. But the game flickers and disappears. Also its SUPER laggy! Lowest settings possible. I have 1 GB or ram. And the graphics card is, Intel Corporation 82865G Integrated Graphics Controller (rev 02). I know it isnt good.
I have a DELL Inspiron 15R 5537.
It has "switchable graphics" since it has two video cards, the Intel HD 4400 Graphics Card and the AMD Radeon 8850M.
Now the Catalyst Control Center's "Configure Switchable Graphics" application allows me to choose (by browsing and finding the .exe file for that program) which Graphics card to use for running 'some' apps.