Scaling resets from 1.5 to 1 after screen lock / unlock

[Jesper de Jong]

Ubuntu 17.04, I have a 4K (3840x2160) monitor connected to my computer.

I have set the scaling to 1.5 (System Settings / Displays / Scale for menu and title bars).

When I walk away from the computer, after a while the screen is locked. When I unlock it by entering my password, the scaling is reset to 1 and the Ubuntu menu bar at the top of the screen, the launcher and windows are all small.

I have to go back to System Settings / Displays and set it back to 1.5.

Locking / unlocking the desktop should not affect the scaling factor setting.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: xorg 1:7.7+16ubuntu3
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity:Unity7
Date: Sat May 13 11:06:24 2017
DistUpgraded: Fresh install
DistroCodename: zesty
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Iris Graphics 540 [8086:1926] (rev 0a) (prog-if 00 [VGA controller])
   Subsystem: Intel Corporation Iris Graphics 540 [8086:2063]
InstallationDate: Installed on 2017-05-06 (6 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 8087:0a2b Intel Corp.
 Bus 001 Device 003: ID 046d:c31d Logitech, Inc. Media Keyboard K200
 Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic.efi.signed root=UUID=2278e5dc-858b-486d-9d4f-363aef26fab7 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.vendor: Intel Corp.
dmi.board.vendor: Intel corporation
version.compiz: compiz 1:0.9.13.1+17.04.20170109-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.76-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.3-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.3-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.14-0ubuntu1
xserver.bootTime: Sat May 13 09:02:20 2017
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.3-1ubuntu1
xserver.video_driver: modeset

[Jesper de Jong (jespdj)]

It doesn't have anything to do with the lock screen; if I go to System Settings / Brightness & Lock and set Lock to OFF, then wait 5 minutes for the screen to turn off, then press a key to wake it up again, then the scaling is also reset to 1.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.