Segfault - error 6 in libcef.so

[chrisb2244]

Last few days, system has frozen 3 times. 

/var/log/sys.log reports 

<date/time> <hostname> kernel: [<Unix time>] Watchdog[<short number, differs>]: segfault at 0 ip 00007f<rest of address, differs but ends like>af6 sp 00007f<rest of address, close to but not the same as first, ending>650 error 6 in libcef.so[7f<more address, different each time but ending with>000+3cc7000]

I'm not totally sure this is a Spotify problem, but it was the only application launched by me after login to a KDE Plasma 5 system when it last crashed.

The mouse continues to be moveable, but the desktop is unresponsive to clicks or keyboard shortcuts.

Alt-SysRq + R, E throws the user out to the login screen, where login can work. I havent seen it crash after this but the system dbus is no longer running etc, due to I suppose a partial emergency reboot.

Restarting corrects problems with dbus, consolekit etc, but leaves possibility of crash again soon.

I'm also using spotify connect to skip tracks from my phone etc (since no api for dbus anymore **cry cry**) - unsure if this is related, but a very nice new feature (and works perfectly on my Windows 8.1 laptop)

Please let me know what I can test/check/do.

[SweetAndLow]

+Frequency

Ubuntu Gnome 14.04

.crash attached

I see this error about twice a week.

Jul 28 09:01:55 svetter-wkstn kernel: [87706.361377] Watchdog[5842]: segfault at 0 ip 00007eff0ca9083e sp 00007efefd975290 error 6 in libcef.so[7eff0c185000+46b8000]