Display Port on HP t5740 is not working

[Jernej Stopinšek]

When I connect Display Port it does not connect.

xrandr says:

Screen 0: minimum 8 x 8, current 1440 x 900, maximum 32767 x 32767
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 408mm x 255mm
   1440x900 59.89*+ 74.98
   1280x1024 75.02 60.02
   1280x960 60.00
   1152x864 75.00
   1024x768 75.08 70.07 66.01 60.00
   832x624 74.55
   800x600 72.19 75.00 60.32 56.25
   640x480 75.00 72.81 66.67 66.03 60.00
   720x400 70.08
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

I've enabled drm.debug=0xe in grub, so I'm also attaching dmesg output.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic i686
ApportVersion: 2.20.1-0ubuntu2
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tcuser 1045 F.... pulseaudio
CurrentDesktop: XFCE
Date: Wed May 25 14:29:36 2016
HibernationDevice: RESUME=UUID=345a1970-34c2-45c3-bcfd-0f92c1f4cd55
InstallationDate: Installed on 2016-05-18 (6 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1)
IwConfig:
 lo no wireless extensions.

 enp4s0 no wireless extensions.
MachineType: Hewlett-Packard hp t5740
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-22-generic root=UUID=dcb4e8e6-4384-4f59-8853-cd40e1896852 ro rootflags=subvol=@ quiet splash drm.debug=0xe vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-22-generic N/A
 linux-backports-modules-4.4.0-22-generic N/A
 linux-firmware 1.157
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/12/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 786R8 v1.01
dmi.board.asset.tag: Climbers
dmi.board.name: 3641h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: Asset tracking
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr786R8v1.01:bd11/12/2009:svnHewlett-Packard:pnhpt5740:pvr:rvnHewlett-Packard:rn3641h:rvr:cvnHewlett-Packard:ct3:cvr:
dmi.product.name: hp t5740
dmi.sys.vendor: Hewlett-Packard

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Jernej Stopinšek, thank you for reporting this and helping make Ubuntu better.

In order to allow additional upstream developers to examine the issue, at your earliest convenience, could you please test the latest upstream kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ? Please keep in mind the following:
1) The one to test is at the very top line at the top of the page (not the daily folder).
2) The release names are irrelevant.
3) The folder time stamps aren't indicative of when the kernel actually was released upstream.
4) Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds .

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is the release candidate number if it exists.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream.

Also, you don't need to apport-collect further unless specifically requested to do so.

Once testing of the latest upstream kernel is complete, please mark this report Status Confirmed. Please let us know your results.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]