Bug 1389043

Summary:	external display stopped working on thinkpad T440s with kernel 4.7
Product:	[Fedora] Fedora	Reporter:	zingale <zingale>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	24	CC:	gansalmon, ichavero, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone:	---	Flags:	jforbes: needinfo?
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-04-28 17:19:36 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description zingale 2016-10-26 17:30:52 UTC

Description of problem: projectors plugged into the external display port (VGA) are no longer recognized on my laptop (Lenovo thinkpad T440s) under a 4.7 kernel.  If I book into the last 4.6 kernel on the machine, the display is detected without problems.


Version-Release number of selected component (if applicable):


How reproducible: everytime


Steps to Reproduce:
1. boot laptop under 4.7 kernel
2. plug a projector into the external port
3. fail :(

Actual results:


Expected results:


Additional info:

Comment 1 zingale 2016-10-27 12:56:46 UTC

This looks to be an upstream fix:

https://bugs.freedesktop.org/show_bug.cgi?id=98140

https://bugs.freedesktop.org/show_bug.cgi?id=83348

Comment 2 zingale 2016-11-21 19:08:39 UTC

This appears to work again with kernel 4.8.8-200 on Fedora 24

Comment 3 Justin M. Forbes 2017-04-11 14:57:07 UTC

*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There are a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 24 kernel bugs.

Fedora 25 has now been rebased to 4.10.9-100.fc24.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26.

If you experience different issues, please open a new bug report for those.

Comment 4 Justin M. Forbes 2017-04-28 17:19:36 UTC

*********** MASS BUG UPDATE **************
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 2 weeks. If you are still experiencing this issue, please reopen and attach the 
relevant data from the latest kernel you are running and any data that might have been requested previously.