I fixed the same problem the same way.
Error in /var/log/pm-powersave.log:
Running hook /usr/lib/pm-utils/power.d/wireless true:
cat: /sys/class/net/wlan0/device/enabled: No such file or directory
/usr/lib/pm-utils/power.d/wireless true: success.
Fix:
sed -ie '/\/sys\/class\/net\/$1\/device\/enabled/ s/enabled/enable/' \
/usr/lib/pm-utils/power.d/wireless
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https://bugs.launchpad.net/bugs/1414110
Title:
Wireless powersave doesn't work (pm-utils)
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