Minecraft has severe graphics glitches (diagonally split view on the minecraft window, half the image of the background and half minecraft.) it flashes sometimes..
I don't know if that is relevant but I read something on the openGL documentation about graphic images not being dividable by 4 or something, which causes the diagonal corruption of the final image.
So. I tested minecraft in Ubuntu 12 beta 2 (64bit) which did not have that graphical error.
I upgraded the kernel to the version Ubuntu 12 had (3.2), however same problem occurs.
I have Intel B800 processor, with intel hd graphics 2000 i presume. it doesn't tell on ark.intel.com website.
lspci -v outputs
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Device 1b0a:2080
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at f5000000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at e000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
Kernel modules: i915
When minecraft is open, the ubuntu interface also lags, like text etc, buttons also split diagonally in half... Its weird.