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[Bug 1503590] Re: Trouble with DisplayPort


Hadmut Danisch, thank you for reporting this and helping make Ubuntu

Could you please run the following command from a terminal as it will
automatically gather and attach updated debug information to this

apport-collect -p xorg 1503590

Please ensure you have the package xdiagnose installed, and that you
click the Yes button for attaching additional debugging information.

When reporting xorg related bugs in the future, please do so via the
above method. You can learn more about this functionality at

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
       Status: New => Incomplete

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  Trouble with DisplayPort

Status in xorg package in Ubuntu:

Bug description:

  I've installed 15.10 beta on a brand new ASRock beebox N3150 PC. This
  device has three display connectors, 1x DisplayPort, 2xHDMI. I'm
  having a Display with 2560x1600, and thus want to use with with
  DisplayPort for full resolution.

  When connecting screen and PC with DisplayPort, both the BIOS and the
  Linux BootSplash/Console correctly recognize the screen to be
  connected to DisplayPort and are displayed as usual. But as soon as X
  starts, screen becomes black (and the screen itself somewhat confused,
  because it does not even respond to the menu button anymore).
  Interestingly, the same screen worked properly when connected with
  DisplayPort to another Linux machine with 14.04.

  Connecting the screen with HDMI instead works without any problems,
  but gives a reduced resolution of 1920x1080 only.


  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xserver-xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
  Uname: Linux 4.2.0-14-generic x86_64
  ApportVersion: 2.19-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Wed Oct  7 10:01:31 2015
  InstallationDate: Installed on 2015-09-03 (33 days ago)
  InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150825)
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)

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