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https://bugs.launchpad.net/bugs/1801898
Title:
Only one of two external (displayport) displays is working without
hotplug
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
After upgrading to Ubuntu 18.10 from Ubuntu 18.04, when logging in my one of
my two external displays will not be activated without hotplugging the other
external display.
The display settings app shows the second display as inactive, and when
trying to activate the settings app states that some hardware limitation stops
it from being possible to apply the change.
The laptop lid is closed, the internal laptop display is not active.
Hotplugging the other external display solves the problem - after
hotplug both external displays are active. This makes the bug annoying
but workaroundable.
I am not sure if this bug belongs to the Xorg package or the linux
package.
Hardware:
Thinkpad t430s laptop sitting in a Thinkpad 4338 docking station, with two
external displays connected through displayport (via docking station).
$ sudo lspci -v
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo 3rd Gen Core processor Graphics Controller
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 6000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
Kernel modules: i915
$ apt-cache policy xorg
xorg:
Installed: 1:7.7+19ubuntu8
Candidate: 1:7.7+19ubuntu8
Version table:
*** 1:7.7+19ubuntu8 500
500 http://se.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
100 /var/lib/dpkg/status
$ apt-cache policy linux-image-4.18.0-10-generic
linux-image-4.18.0-10-generic:
Installed: 4.18.0-10.11
Candidate: 4.18.0-10.11
Version table:
*** 4.18.0-10.11 500
500 http://se.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
100 /var/lib/dpkg/status
$ lsb_release -rd
Description: Ubuntu 18.10
Release: 18.10
---
ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
DistUpgraded: 2018-10-24 10:23:47,912 DEBUG icon theme changed, re-reading
DistroCodename: cosmic
DistroRelease: Ubuntu 18.10
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GconfCompiz:
/apps/compiz-1/general:
/apps/compiz-1/general/screen0:
/apps/compiz-1/general/screen0/options:
hsize = 2
vsize = 2
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166]
(rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21fb]
InstallationDate: Installed on 2016-06-06 (883 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
MachineType: LENOVO 2356FW4
Package: xorg-server (not installed)
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-10-generic
root=/dev/mapper/vg_avin-lv_root ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Tags: cosmic ubuntu
Uname: Linux 4.18.0-10-generic x86_64
UpgradeStatus: Upgraded to cosmic on 2018-10-24 (14 days ago)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo wireshark
_MarkForUpload: True
dmi.bios.date: 09/27/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: G7ETA9WW (2.69 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2356FW4
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: R9TW1K9
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG7ETA9WW(2.69):bd09/27/2017:svnLENOVO:pn2356FW4:pvrThinkPadT430s:rvnLENOVO:rn2356FW4:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T430s
dmi.product.name: 2356FW4
dmi.product.sku: LENOVO_MT_2356
dmi.product.version: ThinkPad T430s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+18.10.20180930-0ubuntu1
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20171229-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3
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