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如何修复我的 CPU 四个核心中只有一个被检测到的问题？

tag-icon • tag-icon 12.04 hardware cpu multi-core
如何修复我的 CPU 四个核心中只有一个被检测到的问题？

我有一台 Acer Aspire M5640/M3640 PC，配备 Intel Core 2 Q8200（四核）处理器，运行 Ubuntu 12.04。

现在它似乎只能识别一个 CPU 核心。lscpu输出：

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 23
Stepping:              10
CPU MHz:               2333.403
BogoMIPS:              4666.80
L1d cache:             32K
L1i cache:             32K
L2 cache:              2048K
NUMA node0 CPU(s):     0

我希望在这里Core(s) per socket列出它的价值。CPU(s)4

重要的一点是，我无法定期启动它，但我需要nolapic内核启动参数来避免启动期间出现硬冻结。

说到启动，固件版本是Version: R01-C2

任何关于使用所有四个核心的能力的想法都将受到高度赞赏。

更多信息

dmesg给出：

[    0.000000] Nvidia board detected. Ignoring ACPI timer override.
[    0.000000] If you got timer trouble try acpi_use_timer_override
[    0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[    0.000000] Intel MultiProcessor Specification v1.4
[    0.000000] MPTABLE: OEM ID: nVidia  
[    0.000000] MPTABLE: Product ID: MCP73       
[    0.000000] MPTABLE: APIC at: 0xFEE00000
[    0.000000] Processor #0 (Bootup-CPU)
[    0.000000] Processor #1
[    0.000000] Processor #2
[    0.000000] Processor #3
[    0.000000] IOAPIC[0]: apic_id 4, version 17, address 0xfec00000, GSI 0-23
[    0.000000] Processors: 4
[    0.000000] SMP: Allowing 4 CPUs, 0 hotplug CPUs

和lshw -class cpu

  *-cpu                   
       description: CPU
       product: Intel(R) Core(TM)2 Quad CPU    Q8200  @ 2.33GHz
       vendor: Intel Corp.
       physical id: 4
       bus info: cpu@0
       version: Intel(R) Core(TM)2 Quad CPU    Q8200  @ 2.33GHz
       serial: To Be Filled By O.E.M.
       slot: SOCKET775 M/B
       size: 2333MHz
       capacity: 2333MHz
       width: 64 bits
       clock: 333MHz
       capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm dtherm
       configuration: cores=4 enabledcores=4 threads=4
  *-processor UNCLAIMED
       description: Co-processor
       product: MCP73 Co-processor
       vendor: NVIDIA Corporation
       physical id: 3.3
       bus info: pci@0000:00:03.3
       version: a2
       width: 32 bits
       clock: 66MHz
       capabilities: bus_master
       configuration: latency=0 maxlatency=1 mingnt=3
       resources: memory:fce80000-fcefffff

和dmidecode：

BIOS Information
    Vendor: American Megatrends Inc.
    Version: R01-C2
    Release Date: 02/26/2009
    Address: 0xF0000
    Runtime Size: 64 kB
    ROM Size: 1024 kB
    Characteristics:
            ISA is supported
            PCI is supported
            PNP is supported
            APM is supported
            BIOS is upgradeable
            BIOS shadowing is allowed
            ESCD support is available
            Boot from CD is supported
            Selectable boot is supported
            BIOS ROM is socketed
            EDD is supported
            5.25"/1.2 MB floppy services are supported (int 13h)
            3.5"/720 kB floppy services are supported (int 13h)
            3.5"/2.88 MB floppy services are supported (int 13h)
            8042 keyboard services are supported (int 9h)
            Serial services are supported (int 14h)
            Printer services are supported (int 17h)
            CGA/mono video services are supported (int 10h)
            ACPI is supported
            USB legacy is supported
            LS-120 boot is supported
            ATAPI Zip drive boot is supported
            BIOS boot specification is supported
            Targeted content distribution is supported
    BIOS Revision: 8.15

System Information
    Manufacturer: ACER
    Product Name: Aspire M5640/M3640
    Version: R01-C2
    Serial Number: 91EER71ZCP93401DDA1800
    UUID: Not Present
    Wake-up Type: Power Switch
    SKU Number: To Be Filled By O.E.M.
    Family: To Be Filled By O.E.M.

Base Board Information
    Manufacturer: ACER
    Product Name: MCP73PV
    Version: NVIDIA MCP73
    Serial Number: 000000000
    Asset Tag: To Be Filled By O.E.M.
    Features:
            Board is a hosting board
            Board is replaceable
    Location In Chassis: To Be Filled By O.E.M.
    Chassis Handle: 0x0003
    Type: Motherboard
    Contained Object Handles: 0

答案1

天哪。我显然解决了这个问题。简而言之：

  1. 我将 BIOS 值更改Installer OS select为Other（替代方案是Windows）
  2. 我祈祷并尝试在没有nolapic内核启动参数的情况下进行启动。
  3. 它像魔法一样启动了 Ubuntu（但不确定祈祷的影响）

  4. 现在lscpu给了

    Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    1
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 23
Stepping:              10
CPU MHz:               2336.000
BogoMIPS:              4666.66
L1d cache:             32K
L1i cache:             32K
L2 cache:              2048K
NUMA node0 CPU(s):     0-3

  5. top我在运行几个计算密集型进程时进行了交叉验证

    3504 username   20   0  139m  47m 4308 R  100  1.2   4:57.11 R                  
3444 username   20   0  140m  47m 4316 R   99  1.2   5:24.08 R

  6. 我终于可以给我的公寓供暖了

非常感谢您的帮助和指导。我不太确定我到底做了什么，但它确实有效。特别感谢 BIOS 指导。我从来没有想过要摆弄这些选项……

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