kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

omriasta, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux REPLACE-WITH-BUG-NUMBER

Please note, given that the information from the prior release is
already available, doing this on a release prior to the development one
would not be helpful.

If reproducible, could you also please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.13-rc7

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)

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

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1189639

Title:
  [dp] External Screen doesn't wake up from sleep

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have a Lenovo X1 Carbon with an external screen connected to a Mini DP to VGA adapter. External screen works fine until the display goes to sleep for inactivity (just the display goes to sleep, not the laptop).
  When I return to the laptop, the built in screen wakes but the external screen does not. The screen is still detected, xrandr displays the resolution and I can move the cursor to the external display but the display remains off.
  I have tried cycling with Fn+F7 and also tried Ctrl+Alt+F1 then Ctrl+Alt+F7. The only way to get the external display back on is by disconnecting the adapter from the laptops DP port and reconnecting.

  dmesg produces:
  drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting

  Running 
  Description:	Ubuntu 13.04
  Release:	13.04
  kernel 3.8.0-23-generic
  xserver-xorg-video-intel:
    Installed: 2:2.21.6-0ubuntu4

  
  As a workaround I have disabled the monitor from sleeping in System Settings->Brightness & Lock-> Turn Screen off when inactive for

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