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I'm pretty sure my problem is unique.

I'm using OpenJDK 7 to play Minecraft, in order to avoid wrangling with Wine. Recently, this setup has started to give me problems.

I am getting "System program problem detected" error dialogs, and prompts to send error reports to Apport. This happens even when I'm not playing MC - I'll see it at startup, for example - but I get one of these dialogs several times an hour when I play. Moreover, every so often, the game will freeze. Sometimes the event will be identical to a lag spike, but some of the time, something really weird will happen to my computer:

It briefly flashes through all the windows that I have up, and then settles on a single one - Google Chrome, usually - and both the dashboard and the info-bar along the top of the screen will vanish. I'll still be able to use whatever window it settles on, but I won't be able to switch between windows, or do anything that involves the dash, and the only way to restart my computer is to hard-reboot by holding down the power button. I don't know if keyboard shortcuts for switching windows, etc. work, mostly because I don't know the keyboard shortcuts. This has not happened so far when I'm NOT playing Minecraft.

I have been trying to use several mods, listed below, and installing them using MCPatcher 3.0.3; I'm pretty sure that the problems started when I used MCPatcher to install Optifine and ModLoader at the same time, and had a file conflict. It happens even after I removed all mods from the jar, and after "force updating"; I'm currently experimenting with using MCPatcher to completely un-patch the game. So far, I have experienced the lag-spikes, but it hasn't crashed my computer yet. If it turns out that it doesn't work, I'll try getting a fresh jar file. I will provide updates as they come by editing the post.

Mods: Single Player Commands - version 4.6 (I don't know if this can actually be installed with MCPatcher.) TooManyItems for 1.5.1 (includes Mar 23, 2013 as a date; I don't remember if that's when I downloaded it or if it's something else, although it's probably the former) Timber! (1.5.1) ModLoader (as far as I know, it's for 1.5.1. I should make sure of that.) Optifine 1.5.1 HD B3

Does anyone have any idea what is happening to me?

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closed as off topic by Thomas Ward, Jorge Castro, Eric Carvalho, Basharat Sialvi, Raja Apr 22 '13 at 10:48

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

I use SKMC Launcher as it doesnt patch minecraft directly it builds a patched version at runtime. This allows you to try different load sequences of minecraft mods.

I do use the Oracle Java and not the Open version as Minecraft seems to run better this way. I have been using this since version 1.2.5 with no issues.

As to Apport, I unistalled that as it causes more issues than solves.

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