Bug 1265395

Summary:	[xorg-x11-server] Xorg 1.18 unusable in a VM because of low responsiveness
Product:	[Fedora] Fedora	Reporter:	Joachim Frieben <jfrieben>
Component:	xorg-x11-server	Assignee:	Adam Jackson <ajax>
Status:	CLOSED NEXTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	23	CC:	airlied, robatino, rstrode, xgl-maint
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	1.18.0-0.3.20150907.fc23	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-09-24 05:07:08 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:

Description Joachim Frieben 2015-09-22 19:47:04 UTC

Description of problem:
After upgrading the Xorg stack to ABI version 1.18, running X in a virtual machine is essentially impossible because of low responsiveness.

Version-Release number of selected component (if applicable):
xorg-x11-server-1.18.0-0.2.20150907.fc23

How reproducible:
Always.

Steps to Reproduce:
1. Launch a GNOME session in a VM.

Actual results:
Flickering screen, huge latencies of screen refresh and X input actions.

Expected results:
Normal behaviour.

Additional info:
- X used to behave as expected for ABI version 1.17 as can be verified by downgrading the Xorg stack.
- The QXL driver package which is used by gnome-boxes has only been rebuilt for ABI version 1.18 but not updated itself.
- The issue is possibly rather related to the X driver packages handling mouse and keyboard events.

Comment 1 Dave Airlie 2015-09-23 00:07:10 UTC

Okay we somehow seem to have lost GLX_MESA_copy_sub_buffer in the server GLX extension string.

I'm assigning this to ajax, though I'll keep looking at it

Comment 2 Fedora Update System 2015-09-23 01:57:01 UTC

xorg-x11-server-1.18.0-0.3.20150907.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2015-16471

Comment 3 Ray Strode [halfline] 2015-09-23 18:10:07 UTC

see also bug 1249731 where i did the same "fix" for rhel 7.

Comment 4 Andre Robatino 2015-09-23 20:28:56 UTC

In my VirtualBox Rawhide guest, I immediately get the "Oh no!" screen instead of the GDM login screen after today's Rawhide updates (including xorg).

Comment 5 Andre Robatino 2015-09-24 01:54:21 UTC

(In reply to Andre Robatino from comment #4)
> In my VirtualBox Rawhide guest, I immediately get the "Oh no!" screen
> instead of the GDM login screen after today's Rawhide updates (including
> xorg).

However, the same update on F23 does fix the problem when running GNOME. (BTW, I had been able to use MATE without the issue before the update, as a workaround.)

Comment 6 Fedora Update System 2015-09-24 05:07:06 UTC

xorg-x11-server-1.18.0-0.3.20150907.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Andre Robatino 2015-09-26 03:10:28 UTC

(In reply to Andre Robatino from comment #4)
> In my VirtualBox Rawhide guest, I immediately get the "Oh no!" screen
> instead of the GDM login screen after today's Rawhide updates (including
> xorg).

Ignore - this was a result of https://bugzilla.redhat.com/show_bug.cgi?id=1265913 (an selinux bug).