rtcwake on Kobo?

z000ao8q · 05-02-2013, 01:16 PM

after enabling Wifi on/off to save battery, the next step would be to really sleep the processor.

linux has rtcwake for this. but when I try it, it does not seem to work

Quote:

rtcwake -a -s 10
rtcwake: /dev/rtc0 not enabled for wakeup events

i am not into this topic yet. anyone an idea?

KevinShort · 05-02-2013, 01:46 PM

I haven't tried it myself, but try looking at this thread. From there, it seems you can sleep with these commands:

Code:

echo 1 > /sys/power/state-extended
echo mem > /sys/power/state

z000ao8q · 05-02-2013, 01:55 PM

but the problem with suspend is, that you don´t get it woken up from there automatically anymore.

thats why rtcwake is normally there for

I also found
echo "+20" > /sys/class/rtc/rtc0/wakealarm
but this is not implemented as it looks like

when doing a "cat /proc/driver/rtc" it gives this - but I don´t know how to set this alarm
rtc_time : 18:53:57
rtc_date : 2013-05-02
alrm_time : 00:00:00
alrm_date : 1970-01-01
alarm_IRQ : no
alrm_pending : no
24hr : yes

Lucas Malor · 05-03-2013, 03:43 AM

I've found this googling: http://docs.openmoko.org/trac/ticket/2318

z000ao8q · 05-03-2013, 02:34 PM

google does not help here - at least I did not find anything specific which could help

KevinShort · 05-04-2013, 10:41 AM

For what it's worth, when the Kobo boots up, it calls /etc/init.d/rcS. In that script is this line:

Code:

/usr/local/Kobo/pickel disable.rtc.alarm

Lucas Malor · 05-04-2013, 11:48 AM

Do you think that is this line that resolved the battery consuming bug?

z000ao8q · 05-04-2013, 12:20 PM

I just commented it out in rcS.

did not help anything. wakealarm is still not existing and rtcwake still brings the same error :-(

Lucas Malor · 05-05-2013, 04:59 AM

Out of curiosity, can I ask you why you're trying to sleep the cpu? I think the sleep mode already does that.

z000ao8q · 05-05-2013, 07:39 AM

sure...
I don´t use nickel. I use a cron job once the hour which collects temperature and forecast data of various sensors around the house.
see here

in between I disable wifi already and the battery lasts around one week.
now I want to go one step further to sleep the whole system and wake it up once an hour - which should extend the battery live even more.

...background is, that the nice display would look stupid with a power cable connected all the time...
:-)

Lucas Malor · 05-05-2013, 08:17 AM

Well, congrats! Do you use it for the house heating?

Do you know what type of arm architecture and Linux kernel Kobo uses? Maybe with Google you can find something interesting searching for ACPI tools.

Lucas Malor · 05-06-2013, 01:53 PM

I think I've found: https://wiki.archlinux.org/index.php...#Configuration

z000ao8q · 05-06-2013, 04:32 PM

Quote:

Originally Posted by Lucas Malor

Well, congrats! Do you use it for the house heating?

Do you know what type of arm architecture and Linux kernel Kobo uses? Maybe with Google you can find something interesting searching for ACPI tools.

How can i find out?
I just posted this on a parallel thread

Quote:

[root@(none) /]# cat /proc/version
Linux version 2.6.35.3-850-gbc67621+ (gallen@gallen-P5KPL-AM-BM) (gcc version 4.4.4 (4.4.4_09.06.2010) ) #617 PREEMPT Mon Apr 22 11:07:47 CST 2013

Lucas Malor · 05-07-2013, 05:00 PM

Have you read my previous post? I think acpid can be used to sleep the Kobo using the power button, as Kobo firmware does.

sven · 05-07-2013, 05:34 PM

Quote:

Originally Posted by Lucas Malor

Have you read my previous post? I think acpid can be used to sleep the Kobo using the power button, as Kobo firmware does.

If I understand correctly, he tries not only to suspend the Kobo but also to wake it up automatically.
Do you have a /sys/class/rtc/rtc0 directory and a wakealarm file on your Glo?

05-02-2013, 01:46 PM	#2
KevinShort Addict Posts: 348 Karma: 209937 Join Date: Jan 2012 Location: Virginia, US Device: Kobo Wifi, Kobo Glo	I haven't tried it myself, but try looking at this thread. From there, it seems you can sleep with these commands: Code: echo 1 > /sys/power/state-extended echo mem > /sys/power/state

05-02-2013, 01:55 PM	#3
z000ao8q Connoisseur Posts: 51 Karma: 5942 Join Date: May 2013 Device: kobo mini	but the problem with suspend is, that you don´t get it woken up from there automatically anymore. thats why rtcwake is normally there for I also found echo "+20" > /sys/class/rtc/rtc0/wakealarm but this is not implemented as it looks like when doing a "cat /proc/driver/rtc" it gives this - but I don´t know how to set this alarm rtc_time : 18:53:57 rtc_date : 2013-05-02 alrm_time : 00:00:00 alrm_date : 1970-01-01 alarm_IRQ : no alrm_pending : no 24hr : yes Last edited by z000ao8q; 05-02-2013 at 03:03 PM.

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05-03-2013, 03:43 AM	#4
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	I've found this googling: http://docs.openmoko.org/trac/ticket/2318

05-03-2013, 02:34 PM	#5
z000ao8q Connoisseur Posts: 51 Karma: 5942 Join Date: May 2013 Device: kobo mini	google does not help here - at least I did not find anything specific which could help

05-04-2013, 10:41 AM	#6
KevinShort Addict Posts: 348 Karma: 209937 Join Date: Jan 2012 Location: Virginia, US Device: Kobo Wifi, Kobo Glo	For what it's worth, when the Kobo boots up, it calls /etc/init.d/rcS. In that script is this line: Code: /usr/local/Kobo/pickel disable.rtc.alarm

05-04-2013, 11:48 AM	#7
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	Do you think that is this line that resolved the battery consuming bug?

05-04-2013, 12:20 PM	#8
z000ao8q Connoisseur Posts: 51 Karma: 5942 Join Date: May 2013 Device: kobo mini	I just commented it out in rcS. did not help anything. wakealarm is still not existing and rtcwake still brings the same error :-(

05-05-2013, 04:59 AM	#9
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	Out of curiosity, can I ask you why you're trying to sleep the cpu? I think the sleep mode already does that.

05-05-2013, 07:39 AM	#10
z000ao8q Connoisseur Posts: 51 Karma: 5942 Join Date: May 2013 Device: kobo mini	sure... I don´t use nickel. I use a cron job once the hour which collects temperature and forecast data of various sensors around the house. see here in between I disable wifi already and the battery lasts around one week. now I want to go one step further to sleep the whole system and wake it up once an hour - which should extend the battery live even more. ...background is, that the nice display would look stupid with a power cable connected all the time... :-)

05-05-2013, 08:17 AM	#11
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	Well, congrats! Do you use it for the house heating? Do you know what type of arm architecture and Linux kernel Kobo uses? Maybe with Google you can find something interesting searching for ACPI tools.

05-06-2013, 01:53 PM	#12
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	I think I've found: https://wiki.archlinux.org/index.php...#Configuration

05-07-2013, 05:00 PM	#14
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	Have you read my previous post? I think acpid can be used to sleep the Kobo using the power button, as Kobo firmware does.

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