Ubuntu loads configuration incorrectly on high-dpi screen

[Andreas E.]

When booting, unity loads the desktop partially with double the correct size (default setting: scale factor 2, but it loads as if scale factor 4). The launcher, dash, application switcher appear too big while the panel and applications themselves have correct size.

After some seconds the screen turns black, the wallpaper appears 4 times and then the wallpaper appears at correct size as well as launcher, dash, application switcher and panel. However, the desktop icons and the window content of gtk3 applications appears too small (as with scale factor 1). This is only true for gtk3 applications, not gtk2, Wine, XUL, Qt, VCL. Also, unity panel uses incorrect (strong) font hinting while font hinting is correct in the rest of the system. Unity dash uses partially a fallback sans serif font instead of Ubuntu font and incorrect character kerning.

This is similar as bug #1398208.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity 7.3.1+14.10.20141016-0ubuntu1
Uname: Linux 3.17.1-031701-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.7-0ubuntu8.4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue Apr 21 14:43:35 2015
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.3.18, 3.16.0-34-generic, x86_64: installed
 virtualbox, 4.3.18, 3.16.0-36-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3978]
InstallationDate: Installed on 2015-01-13 (97 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20266
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.17.1-031701-generic root=UUID=8a0dc2f3-fcf3-4e5b-8e23-1441bd36e3dc ro quiet splash acpi_backlight=vendor quiet splash acpi_backlight=vendor vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/31/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 76CN31WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Yoga2
dmi.board.vendor: LENOVO
dmi.board.version: 31900058STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga 2 Pro
dmi.modalias: dmi:bvnLENOVO:bvr76CN31WW:bd10/31/2013:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro:
dmi.product.name: 20266
dmi.product.version: Lenovo Yoga 2 Pro
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Tue Apr 21 14:43:00 2015
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.0-1ubuntu1.3
xserver.video_driver: intel

[Andreas E. (andreas-e)]

This is happening regularly during the first boot(s) after kernel or xorg updates. Is it possible it could be related to something like ureadahead?