Computer: Lenovo Thinkpad T420
Ubuntu 16.10: Display port still don't work
I am using a cable displayport to Hdmi with an asus screen with no
displayport (but 2xhdmi)
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
83et79ww (1.49)
09/05/2016
in the bios : Screen not found, only the built in lcd.
in ubuntu: System/screen => both screens are detected although the 2nd screen
seems not to receive any data & the screen shuts off automatically very fast
(stand by)
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https://bugs.launchpad.net/bugs/1292036
Title:
Displayport on Thinkpad T420s is not usable
Status in linux package in Ubuntu:
Triaged
Bug description:
Hi,
I'm trying to connect an external screen to my thinkpad T420s. I'm running
Ubuntu 14.04 and here is the output of xrandr:
$ xrandr
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 32767 x 32767
LVDS1 connected primary 1600x900+0+0 (normal left inverted right x axis y
axis) 309mm x 174mm
1600x900 60.0*+ 40.0
1440x900 59.9
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x60060.3 56.2
640x48059.9
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
LVDS1 is the LCD-display on the laptop. This is the output of lspci:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [NVS 4200M] (rev
ff)
The screen recognises that something is plugged into the DisplayPort
but Ubuntu is unable to send output to it. It's probably related to
the whole dual graphics card thing.
Thank you for reading this bug!
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Thu Mar 13 15:32:36 2014
DistUpgraded: 2014-02-24 23:10:48,392 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:21d3]
NVIDIA Corporation GF119M [NVS 4200M] [10de:1056] (rev ff) (prog-if ff)
InstallationDate: Installed on 2013-08-07 (217 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386
(20130213)
MachineType: LENOVO 4174PEG
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=
LANG=sv_SE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic
root=UUID=7d44dac8-470f-4bb6-a331-e31a6e61ea51 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to trusty on 2014-02-24 (16 days ago)
dmi.bios.date: 11/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8CET50WW (1.30 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4174PEG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8CET50WW(1.30):bd11/01/2011:svnLENOVO:pn4174PEG:pvrThinkPadT420s:rvnLENOVO:rn4174PEG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4174PEG
dmi.product.version: ThinkPad T420s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.11+14.04.20140305-0ubuntu1
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc3-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc3-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
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
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.10-1ubuntu2
xserver.bootTime: Thu Mar 13 14:44:03 2014
xserver.configfile: default
xserver.errors: Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id8510
vendor
