I recently installed Minecraft on my Ubuntu 12.04 LTS computer with all the correct Java packages and LWJGL, but when I go to play it, the FPS rate drops to ~3 fps and freezes every second, making play almost impossible. My hardware specs. are:
Memory: 3.6 GiB
Processor: AMD Athlon(tm) II X2 245 Processor × 2
Graphics: GeForce 7025 / nForce 630a/integrated/SSE2
OS type: 64-bit
Disk: 242.2 GB
Java: java version "1.6.0_31"
OpenJDK Runtime Environment (IcedTea6 1.13.3) (6b31-1.13.3-1ubuntu1~0.12.04.2)
OpenJDK 64-Bit Server VM (build 23.25-b01, mixed mode)
Minecraft version: 1.7.2
OK, I hope that helps... Please reply.
EDIT: My processor frequency is 2900 MHz.