Complete system freeze upon switching WiFi networks

[Deep Thought]

Occasionally when I am manually switching from one WiFi network to another through the Indicator applet, the entire system freezes completely—neither the laptop's own keyboard and trackpad nor any USB devices produce any effect. The only way to resolve the situation is then to force a power down, which has caused me to lose data on several occasions.

This started occurring on Xubuntu 15.04; I have not had any similar bugs on previous iterations of Xubuntu or other Ubuntu variants.

It seems to happen when I am switching from an unsecured to a particular WPA-secured WiFi network, though as it happens only once in a while (about once every two days or so under moderate computer use) I am not sure about the source of the issue. I do know that it seems to happen only while switching WiFi networks.

This is one of two new network-manager bugs that I noticed around the same time, immediately after upgrading to 15.04. The other bug was https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1270257.

[Prateek Saraswat (kylekartan)]

Hi.
I have the same problem. I am using Ubuntu 15.04 with GNOME.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Prateek Saraswat (kylekartan)]

Excellent.
I am using the Dell XPS 13, the 2015 edition (model number 9343). I am using the stock Ubuntu GNOME 15.04 installation with, broadcom drivers (bcmwl kernel source), and the windows driver for bluetooth. Please let me know what other information is needed

[Zak (gituarmaster810)]

I also am encountering this bug on my XPS 13 9343. It happens once or twice a week. I have to force a reboot in order to reconnect to a new network without crashing.

[pahnin (pahninsd)]

I'm on ubuntu gnome 15.04 Using Dell Vostro-2520, I'm facing the same problem. Stupid ubuntu, should've installed arch.

[Riyugi, Murakami (murakamiriyugi)]

I'm using Ubuntu 14.04.3 installed on Asus U38N and experiencing the same problem. Looks like my case is more unfortunate as it (almost) always happen when I switch to a different wifi network.

[Prateek Saraswat (kylekartan)]

Hi,
My system Updated to 15.10. The issue seems to be resolved now.
/Prateek

[Deep Thought (ti-42-plus)]

This issue hasn't affected me either since upgrading to 15.10.