AMD 64x2 Dual Core Processor - Seen as single processor

[sepia-shots]

The system is only reporting one processor through
BOINC
top
system monitor
Hardware information (although they all correctly label it as a Dual Processor)

My kernal is 2.6.20-16-generic

This appears to be the same problem as seen in #9227.

[Martin Pitt (pitti)]

Do you still have this problem on current hardy or gutsy?

[bobuk (bobtonson)]

nope

thanks for passing by

bob

On 22/02/2008, Martin Pitt <email address hidden> wrote:
>
> Do you still have this problem on current hardy or gutsy?
>
> ** Changed in: linux-source-2.6.20 (Ubuntu)
> Sourcepackagename: hal => linux-source-2.6.20
> Status: New => Incomplete
>
>
> --
> AMD 64x2 Dual Core Processor - Seen as single processor
> https://bugs.launchpad.net/bugs/127398
> You received this bug notification because you are a direct subscriber
> of the bug.
>

--
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[Polaris (arnold-maestre)]

I noticed this week end that my computer (AMD 64x2) was severely dragging its feet when multi-tasking. The system monitor only shows one CPU, so I trolled /var/log/messages to see what's happening. This short segment seems relevant:

Mar 6 18:10:21 dharma kernel: [ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
Mar 6 18:10:21 dharma kernel: [ 0.000000] Processor #0 15:11 APIC version 16
Mar 6 18:10:21 dharma kernel: [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
Mar 6 18:10:21 dharma kernel: [ 0.000000] Processor #1 15:11 APIC version 16
Mar 6 18:10:21 dharma kernel: [ 0.000000] WARNING: NR_CPUS limit of 1 reached. Processor ignored.

uname -a gives Linux dharma 2.6.24-11-386 #1 Fri Feb 29 21:28:00 UTC 2008 i686 GNU/Linux

I suppose I could fix this by forcing a more appropriate kernel package, the point being, I never had to.

[Polaris (arnold-maestre)]

Silly me. I had a peek at the grub menu while rebooting (it is usually hidden), and two versions of the kernel are available : -generic and -386. I don't know why, previous kernels are all generic. Booting with generic, both processors wotk fine.

[Leann Ogasawara (leannogasawara)]

Marking this "Fix Released" against the Hardy kernel. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status .

Against the 2.6.20 kernel this will be closed. Thanks.