Wifi doesn't work after resume from suspend in Ubuntu 15.04 (Dell Latitude E4310)
Posted by Admin • Sunday, May 17. 2015 • Category: Linux
Although toggling the hardware Wi-Fi switch usually fixed this issue, it was decidedly annoying for the non-technical user of this laptop. Googling for a well-known solution turned up several, but none of these worked. I found that either running
usually worked, so I tried to stick that into /etc/pm/sleep.d - but that script was never used. I then discovered that in 15.04 Ubuntu switched to systemd, which requires a service file in /etc/systemd/system/ In the end, it turns out that the problem is intermittent, therefore it is not possible to simply toggle networking blindly and hope for the best. Half the time it will not work. The ultimate solution turned out to be a combination of a toggle and a check, and both could be done via network manager, as follows:nmcli r wifi off nmcli r wifi on
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