Yes, I'm experiencing the same thing. After a lock screen, my windows all move back onto one monitor.
The main monitor has had the resolution dropped from 3840x2160 --> 2560x1440 Linux worky 3.19.0-18-generic #18-Ubuntu SMP Tue May 19 18:31:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux unity 7.3.2 Graphics: Card: NVIDIA GK104GLM [Quadro K3000M] bus-ID: 01:00.0 Display Server: X.Org 1.17.1 drivers: nvidia (unloaded: fbdev,vesa,nouveau) Resolution: 1920x1080@59.9hz, 1920x1080@60.0hz, 2560x1440@60.0hz GLX Renderer: Quadro K3000M/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 346.59 Direct Rendering: Yes $ xrandr Screen 0: minimum 8 x 8, current 5560 x 1920, maximum 16384 x 16384 VGA-0 disconnected (normal left inverted right x axis y axis) DP-0 connected primary 1080x1920+2560+0 left (normal left inverted right x axis y axis) 531mm x 298mm 1920x1080 59.9*+ 1680x1050 60.0 1600x1200 60.0 1440x900 59.9 1280x1024 60.0 1280x960 60.0 1280x800 59.8 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 DP-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) DP-4 connected 1920x1080+3640+13 (normal left inverted right x axis y axis) 382mm x 215mm 1920x1080 60.0*+ DP-5 disconnected (normal left inverted right x axis y axis) DP-6 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 607mm x 345mm 3840x2160 60.0 + 2560x1440 60.0* 1920x1080 60.0 59.9 1680x1050 60.0 1600x900 60.0 1440x900 59.9 1280x1024 75.0 60.0 1280x800 59.8 1280x720 60.0 1152x864 75.0 1024x768 75.0 70.1 60.0 800x600 75.0 72.2 60.3 56.2 640x480 75.0 72.8 59.9 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity in Ubuntu. https://bugs.launchpad.net/bugs/1295267 Title: Windows change Monitor/Desktop after screen lock Status in Unity: Fix Released Status in Unity 7.1 series: Fix Released Status in unity package in Ubuntu: Triaged Bug description: I run a dual monitor configuration, with one portrait and one landscape. I nearly always have multiple applications open in multiple windows across both monitors and all virtual desktops. When I lock the screen and then unlock, my application windows will move from their original position. Sometimes they are in completely random positions; Other times they seem to get the monitors confused, and rather than being in the top half of the portrait monitor they are on the top half of the landscape monitor; Sometimes it is only a new desktop, but the monitor position is the same; Sometimes it is the same desktop, but on the other monitor. Description: Ubuntu 13.10 Release: 13.10 What I expect to happen: When I unlock my computer, all the windows are in the same position on the same monitor and desktop as I left them. What actually happens: When I unlock my computer, some or all of the windows have been changed to a random position on a random monitor and/or desktop. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1295267/+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