https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1555775 #52
has a workaround
put
#! /bin/sh
# This script rescans the PCI bus after resume from suspend to fix
# broken WiFi, wired ethernet, and the card reader on the Alienware 15 R2.
case $1/$2 in
pre/*)
echo "Going to $2..."
# Place your pre suspend commands here, or `exit 0` if no pre suspend
action required
;;
post/*)
echo "Waking up from $2..."
# Place your post suspend (resume) commands here, or `exit 0` if no post
suspend action required
echo 1 > /sys/bus/pci/devices/0000\:00\:1c.4/rescan
echo 1 > /sys/bus/pci/devices/0000\:00\:1c.5/rescan
echo 1 > /sys/bus/pci/devices/0000\:00\:1c.6/rescan
esac
in file
/lib/systemd/system-sleep/aw_pci_rescan
change permission by
chmod +x
Working for me tested on 16.04 with kernel 4.9
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https://bugs.launchpad.net/bugs/1607571
Title:
No network devices after suspend and resume
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