I can confirm this bug in Xubuntu 16.04 (xfce version 4.12) with a dedicated graphics adapter (using the proprietary nvidia kernel module).
In my opinion, the importance is not medium as it produces serious trouble when working with a docking station. I either work at home, the laptop lid closed and the laptop docked in the docking station. There is an external monitor connected to the docking station. Mirroring both the laptop and external monitor is not possible due to this bug. When I wake up the laptop from suspend to ram, the laptop is the primary monitor, but the lid is closed. The external monitor is not powered up. Then I have to open the lid, log in, reconfigure the external monitor again and can then close the lid. The laptop is right below my external monitor. There is no space to have both monitors active. I already tried having the external monitor the primary monitor. Then I run into another problem when taking the laptop with me. When woke up on the go, the laptop display is not activated. Instead it stays powered off. It looks like the no longer available external monitor is still the primary monitor. What about this suggestion: Set all unconfigured monitors to mirrored instead of off. This way there is a good chance to get access to the graphical user interface again. N.B. I do not know why, but in 14.04 xrandr could not be used from a console, although xorg cookies and display variables were set correctly. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1497806 Title: Mirrored display broken in Xubuntu Status in xorg package in Ubuntu: Confirmed Bug description: Mirrored displays is not accessible (grayed out) when trying to activate this feature for multi-monitor support. I am not sure which specific package to nominate for this bug, but it seems to only be happening on systems with XFCE4 installed and running (Including Xubuntu, Mint, and Debian). It maybe an error with the package xfce4-display-settings, but I am not sure. This bug is being reported from: Description: Linux Mint 17.2 Rafaela Release: 17.2 Here is a copy of this Bug Report on Bugzilla: https://bugzilla.xfce.org/show_bug.cgi?id=11712 This bug report also has a picture attachment which is exactly what I am seeing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1497806/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
