I can use the computer for 2 hours without a problem, then when I do any random memory hungry action (Youtube Video, starting many application simultaneously) the computer becomes very slow and stays like that even if I kill many processes.

I don't know what causes this and even the Gnome System Monitor shows normal memory and CPU usage.

Restarting the X session doesn't fix it and the only way to get my computer back to normal is with a system reboot.

I'm Using Ubuntu 12.04 with XCFE.

How can I detect the source of this behaviour? And how can I fix sluginess without restarting the computer?


After more investigation, I concluded that the error is some incompatibility with the kernel 3.x, I had the same error in Fedora Live, Ubuntu Live...


I don't have the time to troubleshoot this issue and play with th system until it works fine, so I installed Debian Wheezty which uses Kernel version 2.x.


Without noticing it, I was using the wrong power adapter for my computer (65W instead of 90W). One day my computer was lagging and I removed the card that goes to the wall from the adapter, leaving the adapter connected to the computer and suddenly the computer works fine again, this is when I started suspecting the adapter.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.