Comment 6 for bug 1829399

Looks like it was actually longer than 10 seconds as I opened the lid 1 sec
after the power light began to pulse.

Fri 17 May 2019 09:48:20 AM CEST - state: open
Fri 17 May 2019 09:48:21 AM CEST - state: open
Fri 17 May 2019 09:48:22 AM CEST - state: open
Fri 17 May 2019 09:48:23 AM CEST - state: open
Fri 17 May 2019 09:48:24 AM CEST - state: open
Fri 17 May 2019 09:48:25 AM CEST - state: closed
Fri 17 May 2019 09:48:26 AM CEST - state: closed
Fri 17 May 2019 09:48:27 AM CEST - state: closed
Fri 17 May 2019 09:48:28 AM CEST - state: closed
Fri 17 May 2019 09:48:29 AM CEST - state: closed
Fri 17 May 2019 09:48:30 AM CEST - state: closed
Fri 17 May 2019 09:48:31 AM CEST - state: closed
Fri 17 May 2019 09:48:33 AM CEST - state: closed
Fri 17 May 2019 09:48:34 AM CEST - state: closed
Fri 17 May 2019 09:48:35 AM CEST - state: closed
Fri 17 May 2019 09:48:36 AM CEST - state: closed
Fri 17 May 2019 09:48:37 AM CEST - state: closed
Fri 17 May 2019 09:48:38 AM CEST - state: closed
Fri 17 May 2019 09:48:39 AM CEST - state: closed
Fri 17 May 2019 09:48:40 AM CEST - state: closed
Fri 17 May 2019 09:48:41 AM CEST - state: closed
Fri 17 May 2019 09:48:42 AM CEST - state: closed
Fri 17 May 2019 09:48:43 AM CEST - state: closed
Fri 17 May 2019 09:48:44 AM CEST - state: closed
Fri 17 May 2019 09:48:45 AM CEST - state: closed
Fri 17 May 2019 09:48:46 AM CEST - state: closed
Fri 17 May 2019 09:48:47 AM CEST - state: closed
Fri 17 May 2019 09:48:48 AM CEST - state: closed
Fri 17 May 2019 09:48:49 AM CEST - state: closed
Fri 17 May 2019 09:48:50 AM CEST - state: closed
Fri 17 May 2019 09:48:51 AM CEST - state: closed
Fri 17 May 2019 09:48:52 AM CEST - state: closed
Fri 17 May 2019 09:48:53 AM CEST - state: closed
Fri 17 May 2019 09:48:54 AM CEST - state: closed
Fri 17 May 2019 09:48:55 AM CEST - state: closed
Fri 17 May 2019 09:49:00 AM CEST - state: open
Fri 17 May 2019 09:49:02 AM CEST - state: open
Fri 17 May 2019 09:49:03 AM CEST - state: open
^C

On Fri, May 17, 2019 at 9:52 AM Chris Gregan <email address hidden>
wrote:

> This is interesting.
>
> `echo mem > /sys/power/state`
> This command was instant S3. The screen went black and the power light
> immediately began to blink.
>
> However...for lid switch the power light takes around 10 seconds to begin
> to pulse, but the state immediately switches.
>
> Fri 17 May 2019 09:48:22 AM CEST - state: open
> Fri 17 May 2019 09:48:23 AM CEST - state: open
> Fri 17 May 2019 09:48:24 AM CEST - state: open
> Fri 17 May 2019 09:48:25 AM CEST - state: closed
> Fri 17 May 2019 09:48:26 AM CEST - state: closed
> Fri 17 May 2019 09:48:27 AM CEST - state: closed
>
> It seems although detection if immediate, it takes 10 seconds to process?
>
> On Thu, May 16, 2019 at 6:05 PM Andrea Righi <email address hidden>
> wrote:
>
>> Hi Chris, just to make sure I understand (from a kernel perspective),
>> can you confirm that `echo mem > /sys/power/state` is also fast at
>> reaching the suspend state?
>>
>> In that case it would be interesting to check if there's a delay at
>> detecting the state of the lid switch. For this, could you run the
>> following command in a bash session:
>>
>> $ while :; do echo `date` - `cat /proc/acpi/button/lid/LID0/state`;
>> sleep 1; done
>>
>> Close the lid, re-open it and you should notice something like this:
>>
>> Thu May 16 17:50:42 CEST 2019 - state: open
>> Thu May 16 17:50:43 CEST 2019 - state: open
>> Thu May 16 17:50:44 CEST 2019 - state: open
>> Thu May 16 17:50:45 CEST 2019 - state: closed
>> Thu May 16 17:50:46 CEST 2019 - state: closed
>> Thu May 16 17:50:47 CEST 2019 - state: closed
>> Thu May 16 17:50:48 CEST 2019 - state: open
>> Thu May 16 17:50:49 CEST 2019 - state: open
>> Thu May 16 17:50:50 CEST 2019 - state: open
>> ^C
>>
>> Note that I have set the "lid close action" to do nothing, in this way
>> we can better isolate the problem. Thanks.
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1829399
>>
>> Title:
>> Lid switch triggered suspend takes much longer than UI triggered
>> suspend
>>
>> To manage notifications about this bug go to:
>>
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829399/+subscriptions
>>
>
>
> --
>
> Chris Gregan
> Engineering Manager
> Solutions QA/Techops
> <email address hidden>
>

--

Chris Gregan
Engineering Manager
Solutions QA/Techops
<email address hidden>