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[Bug 1737155] [NEW] File Chooser takes about 15s to resize itself if screen display scale = 2


Public bug reported:

After opening the File Chooser from any application, it invariably
decides to resize itself, moving the right-hand edge glacially slowly,
which often takes 15s before you can use the dialogue in any way.

If you resize the window horizontally by dragging the handles round the
window edge, it resizes itself back to where it was, again extremely
slowly, before you are allowed to use the dialogue. The only way to
resize the window horizontally is to alter the column widths within the
file list. Then the window resizes itself, again extremely slowly, to
accommodate the new widths. You cannot resize the window vertically at

I have been putting up with this. But today I happened to discover that,
when I changed screen display scale to <2, the FileChooser dialogue
doesn't decide to resize itself. Even if you resize it yourself, it
stays where you put it. And the next time you open a file-chooser it has
remembered the size you set it to last time. A novelty for me - an
obedient UI!

I have to use System Settings>Screen Display>Scale = 2 cos I have a
HiDPI screen, which you can't read otherwise. And any scaling even
slightly lower than 2 is ignored (due to another bug).

Update: I thought this was repeatable. I've suffered this bug for 2
years. Yesterday when I set display scale <2 the bug went away. And when
I set display scale = 2 it came back. But now the bug has mysteriously
disappeared. I can't determine what event caused it to disappear and I
can't get it back. I'm reporting it anyway, given I've written all this

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: compiz 1:
ProcVersionSignature: Ubuntu 4.4.0-101.124~14.04.1-generic 4.4.95
Uname: Linux 4.4.0-101-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.27
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: Fri Dec  8 11:44:36 2017
DistUpgraded: 2016-10-08 14:08:08,470 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
 Intel Corporation Broadwell-U Integrated Graphics [8086:161e] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3906]
InstallationDate: Installed on 2015-07-14 (878 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: LENOVO 80HE
PackageArchitecture: all
PlymouthDebug: Error: [Errno 13] Permission denied: '/var/log/plymouth-debug.log'
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-101-generic.efi.signed root=UUID=688c1e74-ecc7-438b-83fd-0d3d67e209d0 ro splash quiet
SourcePackage: compiz
UpgradeStatus: Upgraded to trusty on 2016-10-08 (425 days ago)
dmi.bios.date: 12/08/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: A6CN47WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: VIUU4
dmi.board.vendor: LENOVO
dmi.board.version: 31900058 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo YOGA 3 Pro-1370
dmi.modalias: dmi:bvnLENOVO:bvrA6CN47WW:bd12/08/2014:svnLENOVO:pn80HE:pvrLenovoYOGA3Pro-1370:rvnLENOVO:rnVIUU4:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoYOGA3Pro-1370:
dmi.product.name: 80HE
dmi.product.version: Lenovo YOGA 3 Pro-1370
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.14.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Fri Dec  8 09:59:02 2017
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
 product id                               17226 
 vendor                                     SDC
xserver.version: 2:1.18.3-1ubuntu2.3~trusty4

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug compiz-0.9 third-party-packages trusty ubuntu

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  File Chooser takes about 15s to resize itself if screen display scale
  = 2

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