No hdmi video output in 13.10

[Jacques Blain]

I have a Lenovo thinkpad t440s

I run Ubuntu 13.10 on it and routinely connect it to my LG plasma TV using hdmi.

Up to this morning it has always worked well. This morning when I connect the HDMI, Ubuntu shows me two connected monitors in the display setting, but the TV receives no signal. I have recently upgrade my kernel to 3.11.0.20-generic. Could his be the source of the problem ?
---
.tmp.unity.support.test.0:

ApportVersion: 2.12.5-0ubuntu2.2
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
DistUpgraded: Fresh install
DistroCodename: saucy
DistroRelease: Ubuntu 13.10
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:220c]
InstallationDate: Installed on 2014-02-01 (84 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: LENOVO 20AQCTO1WW
MarkForUpload: True
Package: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-20-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.11.0-20.34-generic 3.11.10.6
Tags: saucy ubuntu compiz-0.9
Uname: Linux 3.11.0-20-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip fuse libvirtd lpadmin plugdev sambashare sudo
dmi.bios.date: 11/12/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET64WW (2.14 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 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:bvrGJET64WW(2.14):bd11/12/2013:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98401PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQCTO1WW
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Sun Apr 27 07:48:05 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 4669
 vendor AUO
xserver.version: 2:1.14.5-1ubuntu2~saucy1

[Daniel Letzeisen (dtl131)]

I'm not sure if xserver-xorg-video-intel is the correct package (could be more of a kernel/modesetting issue), but it's a lot closer than alsa-driver...

[Daniel Letzeisen (dtl131)]

Please run the following command to gather relevant logs:
apport-collect 1313071

[Jacques Blain (blain-jacques)]

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[Jacques Blain (blain-jacques)]

Hello Daniel

I ran the command as requested

Have a nice day

[Jacques Blain (blain-jacques)]

I have additional information concerning this bug :

At work I easely connect and get an output trough HDMI on an Asus monitor. At home I used to get the same on my LG plasma TV. Now the TV actually shows that it is connecting but the PC never sends an actual output signal to the TV.

So it has to be some sort of driver issue in this case

[penalvch (penalvch)]

Jacques Blain, thank you for reporting this bug to Ubuntu. Saucy reached EOL on July 17, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

If this is reproducible in a supported release, please file a new report.