Ubuntu
libdrm package

External monitor detected only on first plug.

Bug #1411552 reported by EdgarPE on 2015-01-16

This bug report is a duplicate of: Bug #1300914: External screen undetected after first plug. Edit Remove

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	libdrm (Ubuntu)	Confirmed	Undecided	Unassigned

Bug Description

My problem is, If I connect an external display (monitor, projector, etc) Ubuntu detects it only once, only the first time I plug it in. After that, I can't reconnect that external display again, Ubuntu does not see it. After a system restart the disply is detected again, for the first time I plug it in.

This problem is really annying, because initializing all the applications run before needs a lot of time.

I don't know if problem is with the libdrm package, but my syslog got a lot of these errors when I plugged OUT the display:

Jan 16 09:23:33 probook430 kernel: [ 92.060702] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up
Jan 16 09:23:33 probook430 kernel: [ 92.066291] [drm:intel_dp_start_link_train] *ERROR* too many voltage retries, give up

This problem is persistent, and can be reproduced every time with every external display.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libdrm-intel1 2.4.56-1~ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.6
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 Jan 16 09:35:28 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 4.3.10, 3.13.0-43-generic, x86_64: installed
virtualbox, 4.3.10, 3.13.0-44-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device [103c:1946]
InstallationDate: Installed on 2014-05-08 (252 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Hewlett-Packard HP ProBook 430 G1
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-44-generic root=UUID=23e372b4-5879-48d4-9c78-b868fcb03d22 ro quiet splash vt.handoff=7
SourcePackage: libdrm
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/10/2013
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L73 Ver. 01.04
dmi.board.name: 1946
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 89.12
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL73Ver.01.04:bd09/10/2013:svnHewlett-Packard:pnHPProBook430G1:pvrA3008CD20003:rvnHewlett-Packard:rn1946:rvrKBCVersion89.12:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ProBook 430 G1
dmi.product.version: A3008CD20003
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.11.3+14.04.20141104-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1~ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.6
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 2:2.99.910-0ubuntu1.3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Fri Jan 16 09:22:09 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 12588
vendor AUO
xserver.version: 2:1.15.1-0ubuntu2.6

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