Core2Duo CPU only reports 1 core (Karmic&Lucid beta)

Bug #444686 reported by Vince on 2009-10-06
30
This bug affects 6 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Undecided
Unassigned
linux-kernel-headers (Ubuntu)
Undecided
Unassigned

Bug Description

On Karmic Beta, /proc/cpuinfo reports one core for my core 2 duo laptop (Macbook Pro 5.3).
It also reports the wrong frequency (1596Mhz instead of 2.6Ghz), but that was already reported in another bug report.

It probably also uses one single core.

(Ubuntu Karmic Koala Beta 64bit)

/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Duo CPU P8800 @ 2.66GHz
stepping : 10
cpu MHz : 1596.000
cache size : 3072 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority
bogomips : 5305.97
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

ProblemType: Bug
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: NVidia [HDA NVidia], device 0: HDA Generic [HDA Generic]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: NVidia [HDA NVidia], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: slayer 1942 F...m pulseaudio
 /dev/snd/controlC0: slayer 1942 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xe7480000 irq 22'
   Mixer name : 'Generic 1013 ID 4206'
   Components : 'HDA:10134206,106b4b00,00100301'
   Controls : 5
   Simple ctrls : 3
Date: Tue Oct 6 18:19:42 2009
DistroRelease: Ubuntu 9.10
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 pan0 no wireless extensions.
MachineType: Apple Inc. MacBookPro5,3
NonfreeKernelModules: nvidia
Package: linux-image (not installed)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-11-generic root=UUID=bf768ad8-7b89-466d-ae66-5982440e08c5 ro quiet splash
ProcEnviron:
 LANG=fr_BE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-11-generic N/A
 linux-firmware 1.20
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux-meta
Uname: Linux 2.6.31-11-generic x86_64
XsessionErrors:
 (gnome-settings-daemon:1956): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1956): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:2052): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2081): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnome-panel:2051): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -3 and height 24
dmi.bios.date: 06/15/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP53.88Z.00AC.B03.0906151647
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F22587C8
dmi.board.vendor: Apple Inc.
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22587C8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP53.88Z.00AC.B03.0906151647:bd06/15/09:svnAppleInc.:pnMacBookPro5,3:pvr1.0:rvnAppleInc.:rnMac-F22587C8:rvr:cvnAppleInc.:ct10:cvrMac-F22587C8:
dmi.product.name: MacBookPro5,3
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

Vince (v-brz) wrote :
Vince (v-brz) wrote :

Following today's kernel update, it now sees 2 cpu (but still at the wrong frequency)

$ uname -a
Linux mbpvbrzL 2.6.31-12-generic #41-Ubuntu SMP Wed Oct 7 19:37:12 UTC 2009 x86_64 GNU/Linux

$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Duo CPU P8800 @ 2.66GHz
stepping : 10
cpu MHz : 1596.000
cache size : 3072 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority
bogomips : 5306.27
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Duo CPU P8800 @ 2.66GHz
stepping : 10
cpu MHz : 1596.000
cache size : 3072 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority
bogomips : 5306.72
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

kernel-janitor (kernel-janitor) wrote :

[This is an automated message. Apologies if it has reached you inappropriately.]

This bug was reported against the linux-meta package when it likely should have been reported against the linux package instead. We are automatically transitioning this to the linux kernel package so that the appropriate teams are notified and made aware of this issue.

If this bug really is a bug in the linux-meta package you can move it back to linux-meta and set the Status to Confirmed, or contact us on the #ubuntu-kernel channel on the FreeNode IRC server. Thanks.

affects: linux-meta (Ubuntu) → linux (Ubuntu)
drew einhorn (drew-einhorn) wrote :

I have a similar problem, not sure if it is the same bug, it may be

I have an older box with 2 2.4 GHz Xeon processors only one cpu is started with the current karmic kernel 2.6.31-14-generic

the upgrade from 9.04 -> 9.10 left some 9.04 kernels in /boot 2.6.28-16-generic starts both cpus

    ?field.comment=I have a similar problem, not sure if it is the same bug, it may be

I have an older box with 2 2.4 GHz Xeon processors only one cpu is started with the current karmic kernel 2.6.31-14-generic

the upgrade from 9.04 -> 9.10 left some 9.04 kernels in /boot 2.6.28-16-generic starts both cpus

drew einhorn (drew-einhorn) wrote :

Could not figure out how to attach the second dmesg where 2.6.28-16-generic successfully started both cpus here it is

mubix (jd-mubix) wrote :

I'm at 2.6.31-18 SMP with an E8400 Core2Duo - only reports one core

Chris (cnaegelen) on 2010-04-03
summary: - Core2Duo CPU only reports 1 core (Karmic Beta)
+ Core2Duo CPU only reports 1 core (Karmic&Lucid beta)
Brad Figg (brad-figg) on 2010-07-13
tags: added: kj-triage
Brad Figg (brad-figg) on 2010-12-03
tags: added: acpi-apic
Brad Figg (brad-figg) on 2011-05-04
Changed in linux (Ubuntu):
status: New → Confirmed
tags: added: b73a1py79

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: Confirmed → Won't Fix

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