openSUSE 12.3 only sees 1 core on my amd athlon 64x2 4400+ cpu

English Hardware
#1

i noticed that my computer is running slow so I checked system monitor and found only 1 core running. Then checked yast>hardware>system info>cpu and found that it only sees 1 core too. Finally I re-booted and the bios threw it’s usual message that two cores are up. Do I have a half dead CPU and my bios just doesn’t know yet? Can anyone tell me how to revive my trusty (till now) old CPU to full health? I noticed this after moving to openSUSE 12.3 with 3.7.10-1.11-desktop kernel.

#2

I used to have this problem with the 3800+. A few things you could do, but I don’t really have a solution.

  1. Try the default or vanilla kernels just to see if they work.
  2. There is an option in the kernel hacking section (when compiling the kernel). I think it is “Enable verbose x86 bootup info messages” if I remember rightly. Disabling it was rumoured to fix the single cpu issue. I could be wrong but I know it was something like this. If I find a source to site I will post again and cite it.

Also use the command dmesg for info.

#3

You can open up a terminal session and give us the output of:

cat /proc/cpuinfo

AND this for your Loaded Kernel CPU support. Mine shows 512, so its not number of cores found, just total supported.

zcat /proc/config.gz | grep NR_CPUS

This is a rather old CPU which makes me ask when was the last time you did a full system cleaning, reseating every card, memory module, cable, blowing out all heat sinks and checking every cooling fan for operation? You can even pull the CPU and reapply thermal compound if you suspect over heating, but generally not required.

Here is a link to all kernel load options: https://www.kernel.org/doc/Documentation/kernel-parameters.txt

I have a blog on Grub2 you can find here: GNU Grub2 Command Listing Helper with --help & Input - Blogs - openSUSE Forums , to help add those options.

I have a blog here: openSUSE and Installing New Linux Kernel Versions - Blogs - openSUSE Forums in case you want to try a different kernel.

Thank You,

#4

And please also show the output of

cat /proc/cmdline
#5

On Sun 02 Jun 2013 05:56:01 PM CDT, stitzenheimer wrote:

i noticed that my computer is running slow so I checked system monitor
and found only 1 core running. Then checked yast>hardware>system
info>cpu and found that it only sees 1 core too. Finally I re-booted
and the bios threw it’s usual message that two cores are up. Do I have
a half dead CPU and my bios just doesn’t know yet? Can anyone tell me
how to revive my trusty (till now) old CPU to full health? I noticed
this after moving to openSUSE 12.3 with 3.7.10-1.11-desktop kernel.

Hi
Has acpi been(ing) disabled in the BIOS or during boot
(check /var/log/messages).

–
Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.3 (x86_64) Kernel 3.7.10-1.11-desktop
up 2:53, 3 users, load average: 0.11, 0.16, 0.14
CPU AMD Athlon™ II P360@2.30GHz | GPU Mobility Radeon HD 4200

#6

If you think that the issue is with latest kernel then you can explore the following.:-
By default 12.3 will keep more than one kernel unless you have disabled this features. When booting through grub choose Grub Boot menu==> advanced==> choose older kernel and check whether cpus are good. repeat with other kernels. Also try the “recovery” options .

#7

You were right Malcom. My acpi was disabled. I did that trying to remember how to keep vlc or kaffeine from blanking the screen in the middle of movies. Thanks again for your help!