Ubuntu

Dual core: After update only one core is shown is task manager

Asked by arekkusu

I've been using Hardy on my dual core computer since it has been released.

In the task manager the two core were shown separately, but now I only see one cpu. I am not sure what did that (update, kernel update ? or something else)...

Also if I type de following command:
cat /proc/cpuinfo

I only get "processor : 0 (...)" showing up.

So it look like the system is only using one core... Or is is just that the two core are shown as one... I don't know.

Anyone had the same problem or has a suggestion ?

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Bhavani Shankar (bhavi) said : 		#1

Hello

Please check the output of

sudo lshw -C cpu

Mine looks like this:

 *-logicalcpu:0
          description: Logical CPU
          physical id: 0.1
          width: 64 bits
          capabilities: logical
     *-logicalcpu:1
          description: Logical CPU
          physical id: 0.2
          width: 64 bits
          capabilities: logical

If anything is missing please do post back

Regards

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arekkusu (arekkusu-r) said : 		#2

Thanks for the answer.

I just tried it and I get the same output as above (and a bunch of other stuff)

BTW I'am using the 32bit version of Ubuntu.

I am not sure if I'll be able to access the internet the next few days so don't be surprise if I take some time to reply.

Regards

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AFarris01 (afarris01) said : 		#3

ive been having a similar problem with a new AMD Phenom x3 8650...

System monitor (System -> Administration -> System Monitor) shows only 1 CPU, and cat /proc/cpuinfo shows only 1 processor also. ill get the output from the sudo lshw -C cpu a little later and post back with it, since im not in front of that computer right now.