My C720 shuts down as well. Someone in this thread suggested that it was related to whether or not the adapter is connected:
https://productforums.google.com/forum/#!topic/chromebook-central/gjSnZJeMEl...
I've yet to have it shut down when the adapter is connected, whether or not the adapter is plugged into the wall. Although that's not an optimal solution, it has removed a lot of the frustration to have a workaround.
Thanks, Myles
On Mon, Feb 9, 2015 at 7:20 AM, Aaron Durbin adurbin@chromium.org wrote:
On Mon, Feb 9, 2015 at 1:32 AM, Matthias Apitz guru@unixarea.de wrote:
El día Sunday, February 08, 2015 a las 11:14:10PM +0100, Idwer Vollering
escribió:
?
2015-02-08 21:55 GMT+01:00 Matthias Apitz guru@unixarea.de:
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 all the hints.
As I said, the events are sporadic, seldom, but complete power-off (like as you would cut the cable from the motherboard). Of course the system
has no
chance to write anything to /var/log/messages or console.
My hope while writing to coreboot@ was to get a pointer to the list of open ore solved issues within coreboot and/or SeaBIOS to see if this issue is somewhat known, solved or could be related to some known or solved issue. Where can I find such a list which is normally (as we do in my company) attached to the Release Notes of a new version of software.
On the surface this doesn't sound like anything coreboot or SeaBIOS specific. Can you grab the cbmem console logs on the boot after the power off (cbmem -c)? There is also an eventlog sitting in memory as well that can be grabbed. mosys ( https://chromium.googlesource.com/chromiumos%2Fplatform%2Fmosys/+/refs%2Fhea... ) should be able to do that work for you: mosys eventlog list
The last thing to get is the EC console log. That's much harder to get as you have a kernel that doesn't have the EC driver in it. If you feel adventurous the tool (util/ectool) can be found here:
https://chromium.googlesource.com/chromiumos%2Fplatform%2Fec/+/refs%2Fheads%...
Hope that helps.
-Aaron
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