[coreboot] updating coreboot && SeaBIOS on an Acer C720

[Alex G.]

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On 02/08/2015 01:03 PM, Matthias Apitz wrote:
> 
> Hello,
> 
> I'm new to this list and do not even know if it is the right place
> to ask my question. So please be patient and/or forgive me.
> 
> I'm running FreeBSD 11-HEAD on an Acer C720 Chromebook, booting
> directly into SeaBIOS. I'm facing seldom (let's say once a week
> with 12h++ uptime per day) problems of complete power-off of the
> device. I.e. the problem is not related to ChromeOS (because it is
> not running anymore in my C720) and perhaps unrelated to FreeBSD
> (because I see with Google Linux users with the same problem).
> 

Suspect number one is the device overheating. The shutdown is
triggered by the EC. I don't know how you can enable ACPI debug output
on BSD though. On linux, it would be "echo 1 >
/sys/module/acpi/parameters/aml_debug_output", so whatever the FreeBSD
equivalent of that is.

If you can see lines like "EC: LID OPEN" in wherever the system log
is, then you know that's working. Look for things like "EC: THERMAL
OVERLOAD" or "EC: THERMAL SHUTDOWN" in said system log, right after a
shutdown.

Alex

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