Public bug reported:
Ubuntu 15.04
Linked to this bug - https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1382462
Laptop is a Dell Precision M4800.
Dell docking station is used, and this docking station comes with 2 x
DVI, 2 x DisplayPort and 1 x VGA ports.
I have 2 x 1980x1080 monitors - one is using DVI and the other on
DisplayPort and both are detected fine.
I also have a "spare" 20" monitor that is 1680x900 and only take VGA and
this is plugged in.
The laptop is configured to disable the use of Intel GPU and to use
Nvidia GPU at all times.
With nvidia-settings installed:
On the login screen - all 4 displays are on (including laptop) although
going to the VGA/laptop screen cause the screen to "scroll" with the
cursor.
After login - after much work which resulted in just the two HD monitors
showing output and is configured via nvidia-settings. It only detects
two displays.
BUT going to the Display Settings - it shows all 4 screens and any
attempts in using this can break things, Display Settings also freeze on
every action for a short period of time.
On a whim I decided to uninstall nvidia-settings to see how it might
affect things.
Display Settings now works without issues and it show only two detected
screens - it does not detect the laptop screen or the VGA screen.
What I expected:
All 4 displays to be working but at a minimum all 3 external displays to
be working, the laptop screen would be a bonus
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6
Uname: Linux 4.2.0-23-generic x86_64
NonfreeKernelModules: bbswitch nvidia_modeset nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 361.16 Tue Dec 29 23:02:26
PST 2015
GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jan 13 14:37:32 2016
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
nvidia-361, 361.16, 4.2.0-23-generic, x86_64: installed
vboxhost, 5.0.12, 4.2.0-22-generic, x86_64: installed
vboxhost, 5.0.12, 4.2.0-23-generic, x86_64: installed
GraphicsCard:
Intel Corporation 4th Gen Core Processor Integrated Graphics Controller
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:05cc]
NVIDIA Corporation GK106GLM [Quadro K2100M] [10de:11fc] (rev a1) (prog-if 00
[VGA controller])
Subsystem: Dell Device [1028:15cc]
InstallationDate: Installed on 2015-10-15 (90 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
MachineType: Dell Inc. Precision M4800
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-23-generic.efi.signed
root=/dev/mapper/ubuntu--vg-root ro noprompt quiet nomdmonddf nomdmonisw
SourcePackage: xorg
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/19/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A14
dmi.board.name: 0V5GVY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA14:bd05/19/2015:svnDellInc.:pnPrecisionM4800:pvr01:rvnDellInc.:rn0V5GVY:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Precision M4800
dmi.product.version: 01
dmi.sys.vendor: Dell 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.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1
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
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug ubuntu wily
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1533702
Title:
Only 2 monitors detected via laptop docking station
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