Bug 1484125

Summary:	0001-composite-Implement-backing-store-Always.patch breaks X Server Video ABI
Product:	Red Hat Enterprise Linux 6	Reporter:	Daniel Dadap <ddadap>
Component:	xorg-x11-server	Assignee:	Adam Jackson <ajax>
Status:	CLOSED ERRATA	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	6.9	CC:	aplattner, bgollahe, ddadap, jajones, jkachuck, toneata, tpelka, vsharapo
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	xorg-x11-server-1.17.4-17.el6	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1512804 (view as bug list)		Environment:
Last Closed:	2018-06-19 05:19:38 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:
Embargoed:
Bug Depends On:
Bug Blocks:	1425546, 1489947, 1512804, 1561622

Description Daniel Dadap 2017-08-22 18:23:32 UTC

Description of problem:

The patch 0001-composite-Implement-backing-store-Always.patch which is applied to the xorg-x11-server package in RHEL 6.8 and RHEL 6.9 breaks the video driver ABI.

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

RHEL 6.8: 1.17.4-9.el6
RHEL 6.9: 1.17.4-16.el6

How reproducible:

Use a proprietary X driver (e.g. NVIDIA) on an affected server. There will be subtle bugs, e.g.:

* With workstation overlays enabled, GTK+ dropdown menus (e.g. in the nvidia-settings control panel) will be displayed at the wrong coordinates after a resolution change.
* Quad-buffered stereo flipping doesn't work correctly in a stereo-aware compositing window manager.

Additional info:

This is probably avoidable without a full revert of the relevant patch by adding the new field to the end of the WindowRec struct, though this hasn't been explicitly tested, yet.

Comment 2 Adam Jackson 2017-09-08 18:26:07 UTC

That certainly does need fixin'.

Comment 3 James Jones 2017-09-26 19:05:55 UTC

Just a quick update: We verified that adding the new bit to the end of the WindowRec rather than in the middle fixes the issue, as expected.  Initial testing of that alternate patch doesn't reveal any further issues caused by such a change.

Comment 6 Joseph Kachuck 2017-11-14 14:42:05 UTC

Hello,
This bug has been copied as 6.9 z-stream (EUS) bug #1512804

Thank You
Joe Kachuck

Comment 8 Joseph Kachuck 2017-12-06 18:20:26 UTC

Hello Nvidia,
This issue should be corrected in the following test packages:
http://people.redhat.com/jkachuck/.1484125/

Please let me know if you would be able to test this package to confirm it corrects this issue for you.

Please note this download may be removed in 3 days.

Thank You
Joe Kachuck

Comment 9 Tomas Pelka 2017-12-13 07:50:18 UTC

(In reply to Joseph Kachuck from comment #8)
> Hello Nvidia,
> This issue should be corrected in the following test packages:
> http://people.redhat.com/jkachuck/.1484125/
> 
> Please let me know if you would be able to test this package to confirm it
> corrects this issue for you.
> 
> Please note this download may be removed in 3 days.
> 
> Thank You
> Joe Kachuck

Hello Nvidia any feedback?

Thanks
-Tom

Comment 12 Aaron Plattner 2018-01-08 20:06:14 UTC

Sorry for the extreme delay. Our QA folks tested the el6_9.1 packages from your link and confirmed that the bug is fixed.

Comment 13 Tomas Pelka 2018-01-08 21:05:14 UTC

Thank you Aaron!

Comment 16 errata-xmlrpc 2018-06-19 05:19:38 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:1899