Bug 1369480

Summary: The secondary monitor attached through a docking Station continuously flickers when connected over DisplayPort
Product: [Fedora] Fedora Reporter: Shijoe Panjikkaran <spanjikk>
Component: xorg-x11-drv-intelAssignee: Adam Jackson <ajax>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 24CC: ajax, xgl-maint
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Clone Of: Environment:
Last Closed: 2017-07-26 07:27:11 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Attachments:
Description Flags
Non-woring Xorg.log
none
NonWorking register snapshot
none
Non-working video ROM
none
Non-working register dump
none
Non-working journallogs
none
non working 128_opregion
none
non working 64_opregion
none
non working 0_opregion
none
working Video ROM
none
working register snapshot
none
Working register dump
none
Working boot journal
none
working 128_opregion
none
working 64_opregion
none
working 0_opregion
none
Installed Rpms none

Description Shijoe Panjikkaran 2016-08-23 14:03:27 UTC 
Description of problem:

My Lenovo Thinkpad T440 is docked over a Docking station and a secondary monitor is attached connected over a DisplayPort.

The Secondary monitor continously flickers (as in disabled/enabled) when booted over the 4.6.5 kernel including the latest Fedora24 kernel available via regular update. But the same environment works without any issue if booted in to 4.5.5-300.fc24.x86_64.

The application windows do not lose position even when the display goes off and comes again.

The Fedora is fully updated and So is the BIOS, I have even managed to update the Docking Station firmware from https://support.lenovo.com/it/en/documents/ht081248 but still the problem continues. 

Adding the kernel options " intel_pstate=no_hwp i915.enable_rc6=0 " is also seen to help but power management goes for a toss.

The problem is not associated to any suspend/hibernate or undocking triggers.

I have followed the instructions from http://fedoraproject.org/wiki/How_to_debug_Xorg_problems and am attaching the collected information to this bug.

My external Monitor is Dell 24" P2414H

Version-Release number of selected component (if applicable):
1) xorg-x11-drv-intel-2.99.917-24.20160712.fc24.x86_64
2) Kernel-4.6.6-300.fc24.x86_64

How reproducible:
Always

Steps to Reproduce:
1.Dock
2.Boot to the affected kernels and just wait for 2 mins or so
3.

Actual results:
Flickering

Expected results:
Not Flicker

Additional info:
Using KDE but behaviour happens with other environments too
Comment 1 Shijoe Panjikkaran 2016-08-23 14:04:52 UTC 
Created attachment 1193318 [details]
Non-woring Xorg.log
Comment 2 Shijoe Panjikkaran 2016-08-23 14:06:03 UTC 
Created attachment 1193319 [details]
NonWorking register snapshot
Comment 3 Shijoe Panjikkaran 2016-08-23 14:06:56 UTC 
Created attachment 1193320 [details]
Non-working video ROM
Comment 4 Shijoe Panjikkaran 2016-08-23 14:07:35 UTC 
Created attachment 1193321 [details]
Non-working register dump
Comment 5 Shijoe Panjikkaran 2016-08-23 14:08:20 UTC 
Created attachment 1193322 [details]
Non-working journallogs
Comment 6 Shijoe Panjikkaran 2016-08-23 14:09:10 UTC 
Created attachment 1193324 [details]
non working 128_opregion
Comment 7 Shijoe Panjikkaran 2016-08-23 14:09:49 UTC 
Created attachment 1193325 [details]
non working 64_opregion
Comment 8 Shijoe Panjikkaran 2016-08-23 14:10:28 UTC 
Created attachment 1193326 [details]
non working 0_opregion
Comment 9 Shijoe Panjikkaran 2016-08-23 14:11:46 UTC 
Created attachment 1193328 [details]
working Video ROM
Comment 10 Shijoe Panjikkaran 2016-08-23 14:12:56 UTC 
Created attachment 1193329 [details]
working register snapshot
Comment 11 Shijoe Panjikkaran 2016-08-23 14:14:26 UTC 
Created attachment 1193330 [details]
Working register dump
Comment 12 Shijoe Panjikkaran 2016-08-23 14:15:18 UTC 
Created attachment 1193331 [details]
Working boot journal
Comment 13 Shijoe Panjikkaran 2016-08-23 14:15:57 UTC 
Created attachment 1193332 [details]
working 128_opregion
Comment 14 Shijoe Panjikkaran 2016-08-23 14:16:34 UTC 
Created attachment 1193333 [details]
working 64_opregion
Comment 15 Shijoe Panjikkaran 2016-08-23 14:17:06 UTC 
Created attachment 1193334 [details]
working 0_opregion
Comment 16 Shijoe Panjikkaran 2016-08-23 14:18:47 UTC 
Created attachment 1193335 [details]
Installed Rpms
Comment 18 Fedora End Of Life 2017-07-25 22:35:46 UTC 
This message is a reminder that Fedora 24 is nearing its end of life.
Approximately 2 (two) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 24. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '24'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 24 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged  change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
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Comment 19 Shijoe Panjikkaran 2017-07-26 07:27:11 UTC 
Hi, 

I am closing this bug.

This was combination of tuned powersave profile and kernel 4.6.

Not reproducible now on newer tuned and kernels.