Complete system freeze -- (after pressing "Save" from firefox, or other file actions...)

[Luc Pi]

Complete system freeze after pressing "Save" from firefox

After pressing "save", no file chooser dialog shows up, instead the system freezes completely. No mouse response, no keyboard response, clock is frozen.

It happened two times today, though this is not systematic

Possibly nothing runs anymore on the system, as after waiting a few minutes the cooling fan stops.

I file this report against GTK3 as I expected a file chooser, although this may as well be a firefox issue, or something else, I don't know.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: libgtk-3-0 3.16.2-0ubuntu1~vivid1 [origin: LP-PPA-gnome3-team-gnome3-staging]
Uname: Linux 4.1.0-040100rc1-generic i686
ApportVersion: 2.17.2-0ubuntu1
Architecture: i386
CurrentDesktop: GNOME
Date: Wed Apr 29 23:02:25 2015
InstallationDate: Installed on 2014-06-17 (316 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
SourcePackage: gtk+3.0
UpgradeStatus: Upgraded to vivid on 2015-04-27 (2 days ago)

[Luc Pi (oluc)]

It happened again just now after moving a file to trash.

The notification "file foo was deleted | Cancel" appeared in the nautilus window, then...

...the system completely froze.

Only a hard reboot helped.

[Luc Pi (oluc)]

outdated. closing.