I'm running under Windows 7 with an AMD quad-core ~3.2GHz processor, 4GB RAM, and an nVidia GeForce GTS 450 with 2.5GB RAM.
The game runs just fine for a while, but from time to time it just... goes black and doesn't respond to input. The music keeps playing, but that's it. No error messages; I'm forced to close the nonresponding Java window.
When I go back into the game, my inventory and position don't quite match the state of the world as I last saw it - I'll have exactly the right number of torches, for instance, and be in the position I'd got to where I was before, but not all of those torches I'd placed will actually exist in world.
When I'm exploring a cave, this is a nuisance.
When I'm excavating, it's lethal. I was just cutting a minecart tunnel, and the game crashed. When I reloaded, I was inside the hill and suffocated (but saw, before dying, that ALL of the booster tracks I'd placed before the crash were indeed gone from my inventory). I got dumped back at the spawn point with a message that my bed either didn't exist or was blocked - it existed, though maybe there was no direct path because I'd shut doors when I left, I don't know. I tried to see if I could get to around the right spot and dig out the rock, see if my stuff was buried, but no dice. That's track pieces gone that had taken me a few hours to find the iron and gold for - this map has not been very generous with either.
This is, for obvious reasons, rather frustrating. Is there anywhere I can look for an error dump? The .minecraft directory in my Docs tree doesn't seem to have anything, nor does the directory where the launcher is installed. If there's any way I can keep this from happening, I'd love to hear it, because this makes any project of note more of a gamble than I find fun. Killing my own dumb self through falling into lava or bringing gravel on my head is one thing; having the game screw me over like this is another entirely.
Try turning on FPS limiting. Ive seen nicer computers have issues by being 'too good' and running too hot because of it.
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Thanks; I'll give that a try. It's hard to be sure, with sporadic problems like this one(at least I never noticed a pattern), that it's really fixed, but my last session at least let me end normally, so I'll see how it goes in future.
ETA: Yeah, that seems to have fixed it. At least it hasn't given me trouble since, though I haven't been in quite as long a session either. Thanks!