[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Launchpad Bug Tracker]

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

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

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https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Expired

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Christopher M. Penalver]

Bryan Abhser, it will help immensely if you filed a new report with Ubuntu by 
ensuring you have the package xdiagnose installed, and that you click the Yes 
button for attaching additional debugging information running the following 
from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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Re: [Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Bryan Abhser]

I can take over. Not sure what there is to do though.

On Wed, Sep 7, 2016, 1:56 AM bhat3  wrote:

> This bug is still present! I am sorry but i don't have access to the HW
> atm, so someone else needs to take over :)
>
> @Bryan Can you do that?
>
> ** Changed in: xorg (Ubuntu)
>Status: Expired => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1572667
>
> Title:
>   [Thinkpad T450s] Screen flickering on external monitors with docking
>   station
>
> Status in xorg package in Ubuntu:
>   Incomplete
>
> Bug description:
>   Ubuntu Gnome 16.04 RC.
>   Screen does flickering some times.
>   Intel HD graphics.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions
>

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[bhat3]

This bug is still present! I am sorry but i don't have access to the HW
atm, so someone else needs to take over :)

@Bryan Can you do that?

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

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Launchpad Bug Tracker]

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

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

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Expired

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Christopher M. Penalver]

Alexander Vinbæk Strand, thank you for reporting this and helping make
Ubuntu better.

Could you please run the following command once from a terminal by ensuring you 
have the package xdiagnose installed, and that you click the Yes button for 
attaching additional debugging information:
apport-collect -p xorg 1572667

When reporting xorg related bugs in the future, please do so via the
above method. You can learn more about this functionality at
https://wiki.ubuntu.com/ReportingBugs.

** This bug is no longer a duplicate of bug 1550779
   [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches

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

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

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

** Tags removed: apport-collected compiz-0.9 ubuntu

** Attachment removed: "xdpyinfo.txt"
   
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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[bhat3]

*** This bug is a duplicate of bug 1550779 ***
https://bugs.launchpad.net/bugs/1550779

@Bryan Yeah that's why open source collaboration rocks :) I will mark
the bug duplicate and we should follow the other one for getting the fix
backported.

For all T450s owner that might find this bug, you need a newer kernel,
but with 16.04.2 it shouldn't be a problem anymore as it will have the
kernel from 16.10.

** This bug has been marked a duplicate of bug 1550779
   [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Bryan Abhser]

@bhat3 The problem started when I upgraded to Xenial.

I tested 4.6.0-040600-generic and the bug appears to be fixed.

Thanks!

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1572667

Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[bhat3]

Running a newer 4.6 kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v4.6-yakkety and it seems like the issue is gone. That
would actually mean that this bug seems like a duplicate of Bug
#1550779.

@Bryan: Can you please test the newer kernel as well and confirm this?

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You received this bug notification because you are a member of Desktop
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Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[bhat3]

Just did a quick try while working with the annoyance before i will
switch back to my laptop i found that the options for the intel xorg
driver will proably have no impact on this issue. For example:

t450s:~$ cat /var/log/Xorg.0.log | grep -i tear
[10.276] (==) intel(0): TearFree disabled

Did not change something. It rather seems DRM related so next target
should be testing kernel options for the DRM module or testing a 4.5
kernel (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779)

Could also be a generel problem with the dock
(https://www.reddit.com/r/thinkpad/comments/3440um/t450s_flickering_dock_firmware_update_doesnt_run/)
as i didn't run the T450s with anything different than xenial so i don't
know if it's a regression.

@Bryan Did you have the problems before xenial?

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Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Bryan Abhser]

My docking station is Lenovo ThinkPad OneLink Pro Dock model number
DU9033S1

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Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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[Desktop-packages] [Bug 1572667] Re: [Thinkpad T450s] Screen flickering on external monitors with docking station

[Bryan Abhser]

I am also using the display port connector.

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Title:
  [Thinkpad T450s] Screen flickering on external monitors with docking
  station

Status in xserver-xorg-video-intel package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Gnome 16.04 RC.
  Screen does flickering some times.
  Intel HD graphics.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1572667/+subscriptions

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