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[SOLVED] Numeric acpi events - how to catch them?
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widlokm
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PostPosted: Wed May 24, 2017 6:48 pm    Post subject: [SOLVED] Numeric acpi events - how to catch them? Reply with quote

Hello,

I'm using Lenovo T400 laptop with THINKPAD_ACPI kernel module enabled. This driver can pass to user space acpi events related to battery/hardware state of the laptop like:
(taken from linux/Documentation/laptops/thinkpad-acpi.txt):
0x2313 ALARM: System is waking up from suspend because battery is near empty

The question is: How to catch this even with acpid?
For typical events like buttons the line in /etc/acpi/events/button-something file is:
Code:
event=button/sleep
action=/etc/acpi/button_sleep.sh

How to create event and action for this battery alarm? Should it be something like:
Code:
event=0x2313
action=/etc/acpi/battery_alarm.sh


Thanks in advance
Best Regards,
Michael Widlok


Last edited by widlokm on Fri May 26, 2017 6:20 am; edited 1 time in total
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Dr.Willy
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PostPosted: Wed May 24, 2017 8:22 pm    Post subject: Reply with quote

manpage wrote:
The event value is a regular expression (see regcomp(3)), against which events are matched.
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widlokm
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PostPosted: Wed May 24, 2017 9:09 pm    Post subject: Reply with quote

The acpid manual was the first place where I wanted to find the answer, unfortunately it does not tell me what the event will be. A string "0x2313" a number? All examples I found during long searching are only for buttons. So more generic: How the "event=" line should look like to catch numeric events?
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Dr.Willy
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PostPosted: Thu May 25, 2017 10:43 am    Post subject: Reply with quote

widlokm wrote:
The acpid manual was the first place where I wanted to find the answer, unfortunately it does not tell me what the event will be. A string "0x2313" a number?

Regexprs are used to match strings, so it must be a string.
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s4e8
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PostPosted: Thu May 25, 2017 2:38 pm    Post subject: Reply with quote

According to the doc, the event format/string is
ibm/hotkey HKEY 00000080 0000xxxx
for your case is:
ibm/hotkey HKEY 00000080 00002313
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widlokm
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PostPosted: Fri May 26, 2017 6:23 am    Post subject: Reply with quote

Thank You s4e8, that's it.
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