Power not going off on shutdown

michaelrmgreen

michaelrmgreen

More acpi misery! Oh joy....

Symptoms:

'shutdown -p now' shuts down but does not power off.
The message 'acpi0 - Powering system off' is the last message

Software:

FBSD 7.2 and 8.0 rc3, standard installations. No
modifications.

Hardware:

Generic PC with ECS k7s5a motherboard (SiS 735 chipset).
Latst BIOS. Memory checked with memtest86+

Failed attempts at self help:

I've reviewed Handbook, FAQ and Googled the problem.

Any ideas? Advice please.
 
Are you using amd64 or i386? I have the same problem as well, but it only occurs occasionally. No idea how to reproduce the problem yet.
 
I'm using the i386 version, I get the same problem with both 7.2 and 8.0 rc3. Win2000 can shut power down without a problem.
 
Sounds like a buggy BIOS. Some motherboard makers write their ACPI for Windows, Windows, and Windows. Try an Intel board. :)
 
michaelrmgreen said:
I'm using the i386 version, I get the same problem with both 7.2 and 8.0 rc3. Win2000 can shutpower down without a problem.
Click to expand...

I'm running i386 as well. The motherboard is a Gigabyte one. Should we file a PR or is this unrelated to FreeBSD? I have no idea how to log or debug this though.
 
I'd try and see if it's a broken DSDT first. You might also try setting the relevant MIB to lie about the OS in the loader.conf.
hw.acpi.osname="Windows 2001"

Otherwise, you may need to just outright fix the DSDT and tell FreeBSD to use that. There's a few tutorials on the web about that.
 
Thank you very much Mr/Ms Hedwards. I think, after Googling DSDT, you are bang on.

I haven't tried to fix it yet, and I'm in two minds as to whether it's worth the effort, the k7s5a is a cheap Chinese motherboard. Maybe a browse of eBay is the path of least resistance.

Still for others with a similar problem and more worthwhile hardware this may be the way forward. Thanks again.
 
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