I have an HP laptop with Ubuntu 12.10 64-bit installed. Okay, had.
Earlier this week, I upgraded from 4gb to 16gb RAM. Cut to two days later: I was happily coding away in Eclipse, when a wild kernel panic appeared. Rebooting caused the grub menu to appear, but I was unable to mount any of the listed partitions. Various technical support sites were of no help.
I decided to reinstall Ubuntu. It would get to a certain point then spontaneously reboot. This happened multiple times, at the same point.
I ran memtest86 and was IMMEDIATELY confronted with a wall of red error messages. Frankly, I had never seen memory errors occur quite that quickly. After about 90 seconds of running memtest, the system would reboot.
I replaced both RAM chips and ran memtest86. Same issue: wall of red, reboot after a short time. Attempting to reinstall Ubuntu resulted in the same issue.
I'm currently thinking "once is coincidence, twice is enemy action". In other words, I seriously doubt the issues are with the memory (both chips are properly seated, btw). I'm really thinking this is a motherboard issue, but am simply trying to gather opinions on what is wrong. My tech support shop is a Windows bastion, so simply sending it to them would be nearly useless without being able to tell them an idea of what is wrong.
Can anyone make any suggestions?