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If you use Intel Sandy/Ivy Bridge and you have trouble delete the machine is possible that the kernel has detected the processor as a single core or core. Let's see how fix it. |
This is a contribution from Br. Gabriel Máculus, thus becoming one of the winners of our weekly competition: «Share what you know about Linux«. Congratulations Gabriel!
Looking for the problem:
dmesg | grep acpi
Something similar to this will appear:
[0.000000] ACPI: no DMI BIOS year, acpi = force is required to enable ACPI
[0.000000] ACPI: acpi = force override
As you can see, the kernel disables ACPI because the BIOS does not report
the year of manufacture.
The first symptom is that the machine does not turn off when ordered to shutdown.
The solution is to add:
acpi = force
to the kernel boot line (vmlinuz).
To solve it we can definitely add it to the configuration generator
by Grub2.
We open / etc / sysconfig / grub and add acpi = force, leaving something similar to the following:
GRUB_CMDLINE_LINUX = "rd.md = 0 rd.lvm = 0 rd.dm = 0 SYSFONT = True rd.luks = 0 KEYTABLE = us-accents LANG = en_US.UTF-8 rhgb quiet acpi = force"