Public bug reported:
I have a second monitor on DisplayPort, and its list of supported
resolutions was limited to 800x600 and 1024x768 after the latest kernel
update.
I was able to restore the native resolution (1440p) for the monitor
using xrandr.
I'm on Ubuntu 14.04.1 and the GPU is the integrated one on a Haswell
CPU. DisplayPort is run through a Thinkpad laptop dock.
What I did:
Installed the latest Ubuntu kernel update, as recommended by Software Updater
What I expected to happen:
Resolution of external monitor should not have been affected
What happened instead:
Supported modes for external monitor were removed, had to use xrarnd to restore
native resolution
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.14.1-0ubuntu3.3
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 Aug 29 11:44:44 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
i915-3.15-3.13, 0.01, 3.13.0-32-generic, x86_64: installed
i915-3.15-3.13, 0.01, 3.13.0-34-generic, x86_64: installed
i915-3.15-3.13, 0.01, 3.13.0-35-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev
09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:2214]
InstallationDate: Installed on 2014-08-19 (9 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: LENOVO 20AL00BYMS
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic
root=UUID=58f7be01-3efd-41f5-adbb-d0a430268da1 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/06/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GIET69WW (2.19 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AL00BYMS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGIET69WW(2.19):bd02/06/2014:svnLENOVO:pn20AL00BYMS:pvrThinkPadX240:rvnLENOVO:rn20AL00BYMS:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AL00BYMS
dmi.product.version: ThinkPad X240
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.54-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.2.2-0intel1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.2.2-0intel1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.911-0intel1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Fri Aug 29 11:32:03 2014
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 16512
vendor DEL
xserver.version: 2:1.15.1-0ubuntu2
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 resolution third-party-packages trusty
ubuntu
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https://bugs.launchpad.net/bugs/1363017
Title:
Resolution breaks on external monitor after 3.13.0-35 update
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