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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