It just shows the load icon and then crashes

[confusedman]

Operating system: linux mint rebecca

java version: open jdk java 7 runtime

Problem: when I try to open any of the modpacks from the launcher it will minimize the launcher, briefly show a minecraft window sometimes, and then bring the launcher back up, closing the minecraft window.

 

[EvilOwl]

Open the launcher, click Launcher Options in the upper right, click the Open Logs button in the lower left, find the latest file, open it, copy the entire contents and paste it to http://paste.ubuntu.com fill in the author, hit Paste, the site will reload. Copy the link to that page and post it here.