Bug 1843381

Summary:	WebGL context lost with fix for rhbz#1803811
Product:	Red Hat Enterprise Linux 7	Reporter:	Carlos Soriano <csoriano>
Component:	mesa	Assignee:	Dave Airlie <airlied>
Status:	CLOSED ERRATA	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.9	CC:	airlied, jsolomon, mboisver, pvlasin, tpelka
Target Milestone:	rc	Keywords:	Regression
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	mesa-18.3.4-10.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-29 20:24:08 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:	1803811
Bug Blocks:	1835682

Description Carlos Soriano 2020-06-03 07:46:59 UTC

Fix for https://bugzilla.redhat.com/show_bug.cgi?id=1803811 has a regression, reported upstream [0].

The regression breaks hardware acceleration of video encoding/decoding, which could make things like streaming and video watching on high resolutions slow and stutter. Seems to be affecting Firefox and Chromium, so the impact is broad.

Note that hardware accelerated video encoding/decoding for Firefox is quite new, so it wouldn't be a huge change, but still a bad surprise to our customers if they have heard about it.

We should try to fix it in RHEL 7.9 on z-stream, once a fix upstream is available.

[0] https://gitlab.freedesktop.org/mesa/mesa/-/issues/2882

Comment 5 Carlos Soriano 2020-06-15 17:58:57 UTC

The impact is still not fully known, but at this point we know that certain configurations of Chromium are affected, and Firefox seems to be generally affected.

We believe that the best approach to address this issue is to revert the change included in https://bugzilla.redhat.com/show_bug.cgi?id=1803811, which introduced this regression. This is safe to do, as we are basically coming back to what we had before. Requesting exception.

Comment 15 errata-xmlrpc 2020-09-29 20:24:08 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 (mesa bug fix and enhancement update), 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-2020:3990