Avoid restarting network service after hibernating

[yersin]

Hi.

After I hibernate my pc ("suspend to disk", using kpowersave) I always have to restart network (service network restart) so that it works; otherwise, ping 192.168.1.1 shows network unreachable (or something like that).

In short, how can i avoid having to restart network?

[BlueC]

Hmmmm... you shouldn't need to do that, so you have two options:

1) Find what is going wrong and try to fix it. It is most likely a problem with one of the kernel modules related to your network... you dont mention whether you are using a wired or wireless network? It could be that you need to create an "/etc/pm/config.d/unload_modules" to suspend the dodgy network module.

2) Just make a workaround that will bring the network back up after a suspend/resume cycle. Some script like this, saved as /etc/pm/sleep.d/48network and chmod to 755 should work...

#!/bin/bash

. /usr/lib/pm-utils/functions

suspend_network()
{
        if [ -f /var/lock/subsys/network ]; then
                savestate bug_network enabled
                service network stop
        else
                savestate bug_network disabled
        fi
}

resume_network()
{
        case "$(restorestate bug_network)" in
                enabled)
                        service network start
                        ;;
                disabled)
                        ;;
        esac
}

case "$1" in
        hibernate|suspend)
                suspend_network
                ;;
        thaw|resume)
                resume_network
                ;;
        *)
                ;;
esac

exit $?

HTH
C