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[Launchpad Bug Tracker <1510021@xxxxxxxxxxxxxxxxxx>]

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In Vivid on connection of external display using displayport to VGA
adaptor all resolutions upto max of my monitor were supported.

Since upgrade to Wily while my internal display operates correctly the
external display only shows resolutions up to 1024x768 as available, eg:

xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 256mm x 144mm
   1366x768      60.00*+
   1360x768      59.80    59.96  
   1280x720      60.00  
   1024x768      60.00  
   1024x576      60.00  
   960x540       60.00  
   800x600       60.32    56.25  
   864x486       60.00  
   640x480       59.94  
   720x405       60.00  
   680x384       60.00  
   640x360       60.00  
DP1 connected (normal left inverted right x axis y axis)
   1024x768      60.00  
   800x600       60.32    56.25  
   848x480       60.00  
   640x480       59.94

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CurrentDesktop: MATE
Date: Mon Oct 26 10:00:40 2015
InstallationDate: Installed on 2015-07-29 (88 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to wily on 2015-10-22 (3 days ago)
--- 
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
BootLog:
 fsck from util-linux 2.26.2
 /dev/mapper/sda4_crypt: clean, 381687/6053888 files, 5930344/24196096 blocks
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: MATE
DistUpgraded: 2015-10-22 21:49:51,050 DEBUG enabling apt cron job
DistroCodename: wily
DistroRelease: Ubuntu 15.10
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.248+bdcom, 3.19.0-31-generic, x86_64: installed
 bcmwl, 6.30.223.248+bdcom, 4.2.0-16-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device [106b:00fd]
InstallationDate: Installed on 2015-07-29 (98 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
MachineType: Apple Inc. MacBookAir5,1
NonfreeKernelModules: wl
Package: xorg 1:7.7+7ubuntu4
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=9a4f85f8-6215-4430-8874-d6c52eeea39c ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Tags:  wily ubuntu
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
Uname: Linux 4.2.0-16-generic x86_64
UpgradeStatus: Upgraded to wily on 2015-10-22 (12 days ago)
UserGroups: adm cdrom dip libvirtd lpadmin mojo plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 06/08/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA51.88Z.00EF.B03.1506081623
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-66F35F19FE2A0D05
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir5,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-66F35F19FE2A0D05
dmi.modalias: dmi:bvnAppleInc.:bvrMBA51.88Z.00EF.B03.1506081623:bd06/08/2015:svnAppleInc.:pnMacBookAir5,1:pvr1.0:rvnAppleInc.:rnMac-66F35F19FE2A0D05:rvrMacBookAir5,1:cvnAppleInc.:ct10:cvrMac-66F35F19FE2A0D05:
dmi.product.name: MacBookAir5,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Mon Oct 26 09:17:33 2015
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                               40976 
 vendor                                     APP
xserver.version: 2:1.17.2-1ubuntu9

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug apport-collected resolution ubuntu wily
-- 
After upgrade from vivid to wily external monitor has only limited resolutions
https://bugs.launchpad.net/bugs/1510021
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