Is there something that would looks like a crash log in /var/log/kern.log ?
I suggest you read: https://help.ubuntu.com/community/DebuggingSystemCrash I have seens some errors related to your SD memory card in your dmesg.log. I doubt it has something to do, but yet, you could try to avoid using it a while. -- kernel freeze in 2.6.28-11 (Dell XPS M1530) https://bugs.launchpad.net/bugs/348731 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs