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I have a Lenovo G570 laptop, which played Minecraft perfectly 1 or 2 months ago. Now, whenever I play the game, I'm faced with freezes, which sometimes crash Unity (with some error message like intel_do_flush_locks() failed: blah) and graphical glitches (a diagonal twisted segment of the screen occurred once). As I said, I don't know if this is a result of installing OpenCL drivers, a graphics card problem, or a software one.

Thanks in advance, whiskers75

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up vote 1 down vote accepted

I would say that a software issue is the most probable cause.

Gfx Driver: Perhaps a bug has been introduced with a Kernel update for your particular hardware. You can try starting your computer with an older kernel version see this question on how to , if you are uncertain

Os Update: You can try the Ubuntu version you are currently using but booted of a USB stick. It will contain less recent updates. If you computer crashes often even from a live cd. Its could actually be a hardware problem.

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I know all of this, but thanks for the answer :) – whiskers75 May 4 '13 at 7:23

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