System stopped adjusting display settings when a new display is plugged in

Bug #1499711 reported by Franck
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
gnome-system-monitor (Ubuntu)
New
Undecided
Unassigned

Bug Description

Since I upgraded to wily (beta), my laptop stopped adjusting display settings when I dock or undock it (with an external display attached to the docking station), or even when I attached a new display directly on the laptop.

Expected result: when I dock my laptop, the system recognizes the new configuration and applies the corresponding display settings

Actual result: nothing happens
For example, when docked, I have the laptop main display off, and the external monitor on. When I undock, the main display stays off, until I... (see below)

To get the setting applied, I have to either:
- open the System settings application. No need to change anything, nor to choose Display settings, simply opening the general settings app makes it work.
- or: switch to console and back to X (ctrl+alt+F6 / Ctrl+F7)

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: ubuntu-settings 15.10.3
ProcVersionSignature: Ubuntu 4.2.0-11.13-lowlatency 4.2.1
Uname: Linux 4.2.0-11-lowlatency x86_64
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 25 14:23:55 2015
InstallationDate: Installed on 2014-12-13 (285 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
SourcePackage: ubuntu-settings
UpgradeStatus: Upgraded to wily on 2015-09-21 (4 days ago)

Revision history for this message
Franck (alci) wrote :
Franck (alci)
summary: - System stopped adjusting display settings when docking/undocking
+ System stopped adjusting display settings when a new display is plugged
+ in
description: updated
Revision history for this message
Franck (alci) wrote :

Tested with the dock by plugging a display directly on the VGA port: nothing happens, ie I have to go into settings to have the external display recognized.

tags: added: regression-release
Revision history for this message
Franck (alci) wrote :

Changed to gnome-system-monitor, as I think this is the component driving the display settings changes (but I might be wrong)

affects: ubuntu-settings (Ubuntu) → gnome-system-monitor (Ubuntu)
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