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acpi is not enabled, that's why you can't power off for good.
Go into MCC--> System --> Boot parameters (I think, in English) --> tick the acpi box (first option I think)
Then , just shutdown, this time it will power off totally.
Check into your BIOS whether it supports ACPI or not. This may just be the issue here.
In case the option is not enabled, just do it. Turning manually off is going to get on
your nerves pretty fast..
Okay, but did you go into the BIOS to change your settings if necessary
i.e. enable ACPI, If it isn't ? When you boot , depending on your configuration,
you should be able to enter into BIOS setup by hitting one of the F keys (F2 on
I looked every "corners" in the CMOS settings, but
there was no place where I explicitly enable/disable
the ACPI setting.
I believe this ACPI compliancy is automatically detected
by the system BIOS during boot.
My BIOS is very first version for the board's model, and
I'll look the manufacturer's website if they have recent
BIOS available. Perhaps, the later BIOS might have
an option to enable/disable the ACPI setting among
Well, I just found out that the "apmd", "acpi" and
"acpid" modules weren't installed. And, I had "acpi=ht"
boot option all along.
But enabling the "ACPI" option at the Control Center>
Boot>Boot Parameters didn't bring up any issue of missing
the ACPI modules thus far. Strange.
Anyway, I installed the above modules and left the "acpi=ht"
boot option out. Now, the power off works normally.
However, the overall boot process and the responsive
time are comparably and terrbly much, much slower than
with the "acpi=ht" boot option present.
Also, I'm getting "shell session exited with status 1"
message whenever I tried to exit the console window from
the "su" mode after having executed "modprobe" command.
Why? I don't know.
Now, I guess I could just manually power off the system
and keep the "acpi=ht" boot option for normal system
performance. But, it would be nice if there's a way
to automatically power off the system when selecting
the turn off system option and have the usual system
performance as well.