SliTaz Forum

weilah

Member

Registered: 2013-04-19

Posts: 3

Running rtcwake

Hi there!

This is my first post in the forum, so first of all I wanna thank all the people who are maintaining this project. It's amazing!!

I'm trying to put my system sleep using rtcwake. Every instruction that I'm giving has the same output:

[c]:~# rtcwake -s 60
rtcwake: /dev/rtc not enabled for wakeup events[/c]
It seems that /dev/rtc exists, but no /dev/rtc0. I've even tried:

[c]:~# rtcwake -d /dev/rtc0 -m mem -s 60
rtcwake: can't open '/dev/rtc0': No such file or directory[/c]
I don't know how to enable the /dev/rtc. Does anybody has a clue? The rtc driver seems to be good configured to me...but maybe I'm missing something. I'm no Linux expert:

[c]:~# cat /proc/driver/rtc
rtc_time    : 20:42:13
rtc_date    : 2013-04-19
rtc_epoch    : 1900
alarm        : 00:00:00
DST_enable    : no
BCD        : yes
24hr        : yes
square_wave    : no
alarm_IRQ    : no
update_IRQ    : no
periodic_IRQ    : no
periodic_freq    : 1024
batt_status    : okay[/c]
I'm running SliTaz installed in a hdd using the slitaz-4.0-core.iso. If you need details of the hardware, just tell me.

Thanks once again

emgi

Member

Registered: 2012-12-17

Posts: 127

Re: Running rtcwake

Looks like an issue I ran into recently.

You can create the device manually:

# mknod /dev/rtc0 c 254 0

The numbers are significant, and presumably correct.

If you run into troubles do a google search on mknod /dev/rtc0

/emgi

weilah

Member

Registered: 2013-04-19

Posts: 3

Re: Running rtcwake

Hi emgi, thanks for helping.

I created the device as you said:

[c]# mknod /dev/rtc0 c 254 0[/c]

The first try give me unfortunately the same result:

[c]# rtcwake -m mem -s 60
rtcwake: /dev/rtc not enabled for wakeup events[/c]
So I thought that it uses /dev/rtc per default, but even giving the device flag seems to run into troubles.

[c]# rtcwake -d /dev/rtc0 -m mem -s 60
rtcwake: can't open '/dev/rtc0': No such device or address[/c]
But the new device really exists

[c]# ls -l /dev/rtc0
crw-r--r--    1 root     root      254,   0 Apr 20 09:23 /dev/rtc0[/c]
as does the /dev/rtc

[c]# ls -l /dev/rtc
crw-------    1 root     root       10, 135 Apr 20 09:24 /dev/rtc[/c]
Maybe I should somehow enable the /dev/rtc to be able to recieve wakeup events. But I have sincerely no idea if that is even possible or not.

Thanks again

weilah

weilah

Member

Registered: 2013-04-19

Posts: 3

Re: Running rtcwake

No ideas there?

thanks