[SOLVED] - Dual core cpu not recognised on MGA2

[johanliebs]

Hi all,

Dell D630 Intel Cure 2 Duo, only 1 core recognized after clean CD install. Worked perfectly on MDK 2010.2 & 2011. Bios reports 2 cores, /proc/cpuinfo and Control Center hardware detection only reports 1 core.

Default install with kernel 3.3.6-desktop-2.mga2.
4GB ram

Should I install a server smp kernel? (I also run Virtualbox?)

Thanx!

[doktor5000]

Which CD did you use to install? And please show the full output of

Code: Select all

cat /proc/cpuinfo

and

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uname -a

[johanliebs]

Which CD did you use to install? And please show the full output of

Code: Select all

cat /proc/cpuinfo

and

Code: Select all

uname -a

Live CD Europe 1 – America KDE X86_64

Code: Select all

[johan@localhost ~]$ uname -a
Linux localhost 3.3.6-server-2.mga2 #1 SMP Thu May 17 16:38:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

[johan@localhost ~]$ cat /proc/cpuinfo

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 23
model name      : Intel(R) Core(TM)2 Duo CPU     T8300  @ 2.40GHz
stepping        : 6
microcode       : 0x60f
cpu MHz         : 2394.094
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     : 10
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 up arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm ida dts tpr_shadow vnmi flexpriority
bogomips        : 4788.18
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:


I've installed the SMP server kernel as seen above to try and see if it would fix the issue, but it made no difference.

Thanks

[johanliebs]

No joy, will try and submit a bug....

https://bugs.mageia.org/show_bug.cgi?id=6171

[wintpe]

Does you bios have a selection for smp version or enable mp

Ive seen similar along time ago, where these bios settings have unexpected behaviour, on a much older mandriva around 2001.

If so try changing them.

May help

Regards peter

[johanliebs]

Does you bios have a selection for smp version or enable mp

Ive seen similar along time ago, where these bios settings have unexpected behaviour, on a much older mandriva around 2001.

If so try changing them.

May help

Regards peter

Yip, checked the SMP setting in BIOS, set to ON. I need this machine back in production, so may have to to put MDV 2011 X64 PWP back on until I can get this resolved. MGA Live CD was quite a hassle to install on this laptop, had to change kernel settings for X and start X with the Vesa driver, then install from the GUI. Since then I had some issues with it not recognising the Intel GPU (or NVidia), safe boot, reinstall, Vesa, then on reboot it recognises the Intel again and work as before? Strange? Having shutdown issues as well, but will battle that on another day...

Thanks!

[jankusanagi]

Could you also post the contents of /proc/cmdline?

[johanliebs]

Could you also post the contents of /proc/cmdline?

BOOT_IMAGE=desktop_3.3.6-2.mga2 root=UUID=245ead3f-9795-4e52-b5c6-760244b90de3 splash quiet nokmsboot acpi=off resume=UUID=28a9f453-dc61-4cc5-b74c-550ff4099a52 vga=788

[johanliebs]

Just did a quick check booting an older live cd distro with kernel 2.3.36 and it picks up both cores:

cpu cores : 2

[johanliebs]

I did another install this time via USB. For some reason the xdriver=nvidia worked this time. Install worked perfectly recognising both cores etc. I think the original problem came in when I couldn't get X to start and I used the Live CD Safe Mode to change the driver to Vesa and did a startx to get X working. It seems like the installer will use the live CD's /proc/cmdline value as the default for the HD install. Because safe mode switches off acpi, it was not included in the HD install.