Public bug reported:
I'm trying triple monitor configuration on HD4000:
- 1650x1050 on VGA1
- 1920x1080 on DP2
- 1920x1080 on DP3
Kernel hangs on boot if there is a monitor attached to DP2.
If I attach monitor after boot, changing resolution on DP2 one CPU core
becomes 100% busy with continuous errors:
[drm:intel_dp_start_link_train], training pattern 1 signal levels 00000000
[drm:intel_dp_start_link_train], training pattern 1 signal levels 02000000
[drm:intel_dp_start_link_train], training pattern 1 signal levels 04000000
BTW, Same triple monitor configuration works fine in Windows 7 so I
assume that hardware is ok.
Please advise what can be done next?
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.5.0-25-generic 3.5.0-25.39~precise1
ProcVersionSignature: Ubuntu 3.5.0-25.39~precise1-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: i386
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: [Errno 2] No such file or directory
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not
found.
Card0.Amixer.info: Error: [Errno 2] No such file or directory
Card0.Amixer.values: Error: [Errno 2] No such file or directory
Date: Mon Feb 6 15:34:43 2012
IwConfig: Error: [Errno 2] No such file or directory
Lspci: Error: [Errno 2] No such file or directory
MachineType: ICP/iEi B207
MarkForUpload: True
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-25-generic
root=UUID=0cccb37a-5761-45a8-b9db-1e5f6eebbb80 ro drm.debug=0x06
RelatedPackageVersions:
linux-restricted-modules-3.5.0-25-generic N/A
linux-backports-modules-3.5.0-25-generic N/A
linux-firmware 1.79.2
RfKill: Error: [Errno 2] No such file or directory
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/10/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B207
dmi.board.vendor: ICP/iEi
dmi.board.version: V1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd12/10/2012:svnICP/iEi:pnB207:pvrV1.0:rvnICP/iEi:rnB207:rvrV1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: B207
dmi.product.version: V1.0
dmi.sys.vendor: ICP/iEi
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: apport-bug i386 precise qa-kernel-lts-testing
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https://bugs.launchpad.net/bugs/1153627
Title:
Kernel hangs while booting if there is a monitor connected to DP2
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