Sign up ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

I use a HP Pavilion dv6500, and I recently upgraded my ram on my laptop from 1G to 4G, but I keep getting random issues. Here are a few:

  • When watching youtube videos / vlc videos after a long period of time, the whole system will crash and kernel panic (I can't CTRL+ALT+F1 to a new terminal, Caps lock light flashing)
  • Firefox will crash randomly
  • Compiz has "crashed" once or twice, not sure if related.
  • Nautilus has crashed
  • NetworkManager no longer saves my wifi password (possibly unrelated)

I thought it might be my memory controller, so I did an lshw and found that there was an nVidia memory controller that was unclaimed. It's called MCP67 Memory Controller. After a google search, I found a link to a similar problem on Gentoo.

So I went into the BIOS and did a Memory Test, but it passed. On the article above, it talks about adjusting DRAM timings, but my BIOS doesn't have such a feature.

Is this typical for a quick-and-dirty RAM upgrade? Should I reinstall ubuntu / would that help? Any advice would be greatly appreciated. Thank you!

share|improve this question

closed as off-topic by psusi, BuZZ-dEE, Eric Carvalho, Jorge Castro, blade19899 Dec 18 '13 at 19:06

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – psusi, BuZZ-dEE, Eric Carvalho, Jorge Castro, blade19899
If this question can be reworded to fit the rules in the help center, please edit the question.

If you revert to your original memory sticks, does the problem persist? – K7AAY Dec 17 '13 at 18:04
Try to compile kernel and activate options matching to your hardware. – yilmi Dec 17 '13 at 18:25
I think it is a hardware problem with you new memory or a compatibility issue between the different ram sticks. Do a memtest to confirm. – To Do Dec 17 '13 at 18:36
@yilmi That's my next plan - make myself a gentoo build. – Athan Clark Dec 17 '13 at 18:45
Run the memtest86 option when you boot the ubuntu live cd. Let it go for an hour or so and you will probably find the memory is bad. The lshw and unclaimed memory controller is a red herring; it is always unclaimed. – psusi Dec 17 '13 at 23:40