unity --replace crashes/closes some applications (but not all) since 16.04

Bug #1613297 reported by RastaPopoulos on 2016-08-15
This bug affects 6 people
Affects Status Importance Assigned to Milestone
unity (Ubuntu)

Bug Description

Context : when I start Unity, Compiz takes ~40Mo of RAM. But when I use my computer hours and hours, then it takes more than 100… 150Mo. So since many years, I regularly restart Unity with "unity --replace", and it works : only relaunch the interface, and less RAM.

But since I updated to 16.04, this command completely crashes and closes some of my opened applications. But only some, not all. For example :
- firefox crashes
- thunderbird crashes
- geany crashes
- system monitor crashes
- nautilus remains open
- gnome-terminal remains open

I only want to restart the general interface, and it worked perfectly for years.

If I can provide more informations or logs…

Andrea Azzarone (azzar1) on 2016-08-16
Changed in unity (Ubuntu):
status: New → Triaged
importance: Undecided → High
Michał Sawicz (saviq) wrote :

Confirmed, one data point seems to be that it kills all apps that are launched by unity, i.e. are unity's children? Could be about process groups or cgroups or so.

Andrea Azzarone (azzar1) wrote :

It seems that they are not unity's children but they all belong to 'compiz' process group.

Jelle De Loecker (skerit) wrote :

This is very annoying. Unity/compiz seems to have some issues when my displayport monitors disconnect (which happens when they are turned off). I always have to kill compiz, and then most applications are closed.

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