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When I play Minecraft 1.4.2 on Ubuntu (with and without Optifine), after a while (about five minutes or so) it will crash the whole of Ubuntu, SSP and SMP (frozen interface, no responsiveness).

I would say that it's a Minecraft error because 1.3.2 worked fine. I've tried Open JDK and official Java.

The LWJGL is updated (as detailed here), which has been known in some cases to fix crashing issues. A second user with the same issue reports that it's not an overheating issue, because she keeps an eye on her system temp (Minecraft has been known to overheat laptop GPUs).

Update: Via SSH, I was able to confirm that the computer is still responsive while kde is totally locked up. Killing java resulted in nothing but some extra fuzzy lines on my screen; killing kde removed the lines, oddly enough, but produced no improvement. Rebooting the machine provided no response on my terminal. I had to hit the power switch to get it back. This may, in my case, be related to the proprietary graphics driver fglrx?

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It isn't clear what you are asking here. Can you clarify your question? – Canageek Oct 29 '12 at 14:45
I have edited your question for punctuation and capitalization, but it's still unclear what you've done to resolve the issue, beyond "I've tried Open JDK and normal Java". I have voted to close it until you can add more details. Once you have done so, we can re-open it. – fbueckert Oct 29 '12 at 15:22
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I'm having the same issue. It'll run fine, I'm definitely not overheating, and then the entire computer freezes up and refuses to respond. It's about 5 minutes of play time, and I play multiplayer so the server half is located on a separate machine. I'll add some details to the question – Yamikuronue Oct 29 '12 at 16:15
@Yamikuronue Could it be Unity/Compiz perhaps interfering with the game? What happens with a different DE? – badp♦ Oct 30 '12 at 10:21
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Okay, so if you kill Minecraft from the console does the rest of the system recover? – badp♦ Oct 30 '12 at 12:10
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The lockups are a hardware problem. My old ATI Radion HD 2400 Pro now looks like it's dying in Windows, so the lock-ups under Ubuntu were likely a combination of a progressing hardware fault in the card, differences in ATI's Linux graphics drivers, and Minecraft being demanding of graphics cards. And minecraft linked with steam still works in windows.

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I solved my issue by buying a new laptop. A few weeks after this was posted my last USB port died, and then I started getting lines and graphical glitches, so I think the machine was in its last days. – Yamikuronue Feb 11 at 20:53
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Try using ctrl+alt+backspace.

This will kill the gui and all apps.

Before starting minecraft, try installing openbox for gnome, also install screen.

Load the DE as normal, then open a terminal and type "screen openbox --replace &"

Now try running minecraft.

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This explains well what to do, but it could use some explanation of why the reader is doing these things. – SevenSidedDie Oct 31 '12 at 23:35

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