updating coreboot && SeaBIOS on an Acer C720

[Matthias Apitz]

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).

Before returning the C720 to Acer, which perhaps say "we can not
reproduce" your problem, I wanted to check if the problem is related to
changes or bugs in coreboot or in SeaBIOS. I git'ed out both, but can't
see any lists or release notes of fixed issues.

My C720 says about version of BIOS: SeaBIOS ver.  20131001_113210-build123-m2,
and about coreboot:

BIOS Information
        Vendor: coreboot
        Version:                                                                 
        Release Date: 08/13/2014
        ROM Size: 8192 kB
        Characteristics:
                PCI is supported
                PC Card (PCMCIA) is supported
                BIOS is upgradeable
                Selectable boot is supported
                ACPI is supported
                Targeted content distribution is supported
        BIOS Revision: 4.0
        Firmware Revision: 0.0

Thanks in advance for any pointers to related information, esp. to lists
of fixed issues or release notes.

matthias

[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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[Matthias Apitz]

El día Sunday, February 08, 2015 a las 02:40:45PM -0600, Alex G. escribió:
> 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.

Thanks for your feedback. But this is not a thermal issue. I'm monitoring
the core temps and they are always between 45-50 centi degrees. And, I'm
more an ASCII user, i.e. writing and reading mails, and not using the
C720 to view streams of pictures.

matthias

[Idwer Vollering]

?

2015-02-08 21:55 GMT+01:00 Matthias Apitz :
> El día Sunday, February 08, 2015 a las 02:40:45PM -0600, Alex G. escribió:
> > 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.

hw.acpi.verbose=1 would be a start.
> Thanks for your feedback. But this is not a thermal issue. I'm monitoring
> the core temps and they are always between 45-50 centi degrees. And, I'm
> more an ASCII user, i.e. writing and reading mails, and not using the
> C720 to view streams of pictures.

What's the value of debug.acpi.acpi_ca_version?

I'd boot with verbose set to 'on', so that the default values from
these tunables have changed: debug.boothowto=2048 /
debug.bootverbose=1
Also you probaby need to increase kern.msgbufsize to be able to view every line.
>     matthias