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Error while trying to enter sleep mode in Beagle Bone Black

Ganesh Harshan
Intellectual 550 points

Hi,

While trying to enter sleep mode on beaglebone black am getting an error
When i issue the command echo -n "mem" > /sys/power/state am getting -sh: echo: write error: No such device
The kernel version and os version is as below
root@beaglebone:~# uname -a
Linux beaglebone 3.8.13 #1 SMP Wed Sep 4 09:09:32 CEST 2013 armv7l GNU/Linux
root@beaglebone:~# lsb_release -a
Distributor ID: Angstrom
Description:    Angstrom GNU/Linux v2012.12 (Core edition)
Release:        v2012.12
Codename:       Core edition