On Mon, Nov 18, 2013 at 4:41 PM, Suvayu Ali <fatkasuvayu+li...@gmail.com> wrote:
> On Mon, Nov 18, 2013 at 03:43:57PM +0000, Tom H wrote:
>> On Mon, Nov 18, 2013 at 3:14 PM, Suvayu Ali <fatkasuvayu+li...@gmail.com> 
>> wrote:
>>>
>>> I have been very frustrated with journalctl. The manual page is very
>>> unhelpful in that regard. For example the other day, I wanted to
>>> investigate why my laptop shutdown suddenly (I think it was
>>> overheating), but there was no reasonable way for me to filter the cpu
>>> specific messages. Could you give some pointers how I can do that? I
>>> would be very grateful.
>>
>> Perhaps "journalctl _KERNEL_SUBSYSTEM=<subsystem>"
>>
>> acpi for power?
>
> That does filter the output, but not the messages I was looking for.
> Looking at /var/log/messages tells me the lines should be something like
> this:
>
> kernel: [381990.959785] CPU3: Core temperature above threshold, cpu clock 
> throttled (total events = 38)
>
> But I still can't find where it says shutting down. Anyway, what
> subsystem is the above? Also how can I limit it to kernel messages from
> all subsystems?
>
> Thanks for your response,

You're welcome.

"acpi" had been a guess!

I scratched my head, read the journalctl man page, and found "-F":

# journalctl -F _KERNEL_SUBSYSTEM
platform
scsi
pnp
pci
pci_bus
acpi
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