Bug 1336733

Summary:	Hang when GLX requested from remote session
Product:	[Fedora] Fedora	Reporter:	Ian Collier <imc>
Component:	xorg-x11-drv-intel	Assignee:	Jérôme Glisse <jglisse>
Status:	CLOSED EOL	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	23	CC:	airlied, ajax, ignatenko, jglisse, jjelen, mattias.ellert, mgrepl, mihai, plautrba, tmraz, xgl-maint
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Last Closed:	2016-12-20 20:32:04 UTC	Type:	Bug
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Description Ian Collier 2016-05-17 11:16:06 UTC

Logged in on the console of a standard Fedora 23 desktop, if I ssh to another
Fedora 22 or 23 machine with X forwarding and run any application that requests
GLX, the application hangs.

Example:

ssh -Y localhost glxinfo
imc@localhost's password:
[never returns, can be interrupted with ^C]

I have tried this at a Fedora 22 console and was unable to reproduce the
hang. Also, the hang does not happen if started within a VNC session on
the Fedora 23 host.

When at the Fedora 23 console, the hang does happen if the remote machine
is running Fedora 22, similarly with Fedora 23.  But if the remote host is
running Fedora 20, it works.

I previously reported this on F21 (bug 1243531) but it was closed EOL and then
seemed to start working again, but now the hang is back.

Current versions:
openssh:  7.2p2-3.fc23.x86_64
mesa:     11.1.0-2.20151218.fc23.x86_64
X server: 1.18.3-1.fc23.x86_64
kernel:   4.4.8-300.fc23.x86_64

Comment 1 Jakub Jelen 2016-05-17 14:54:58 UTC

The previous bug was reported on GLX. What makes you think the openssh is to blame?

Can you take the time to pinpoint what update did break it for you? There is a lot of packages involved in your use case and when you claim it worked, we should search for the real cause of this problem.

You can quite safely install F23 openssh package on F22 machine or vice versa. It will be more complicated with X server or kernel I guess.

My testings:

  f23 $ ssh -Y localhost glxinfo
       does not work
  f23 $ ssh -Y f22 glxinfo
       does not work
  f23 $ ssh -Y f21 glxinfo
       does not work
  f22 $ ssh -Y f23 glxinfo
       works
  f22 $ ssh -Y localhost glxinfo
       works
  f22 $ ssh -Y f21 glxinfo
       works
  f21 $ ssh -Y f22 glxinfo
       works
  f21 $ ssh -Y localhost glxinfo
       works

It is client size problem and I would try to blame X server or GLX.

Comment 2 Jakub Jelen 2016-05-18 11:37:33 UTC

Fedora 23:
openssh-7.2p2-3.fc23
glx-utils-8.2.0-4.fc23
xorg-x11-apps-7.7-14.fc23
kernel-4.4.9-300.fc23
(no package mesa installed)

ssh -Y localhost glxinfo
 * On my virtual box f23 it works
 * The same versions on my laptop hangs
 (both fully updated f23)

ssh -Y f23 glxinfo
 * Connection from laptop to virtual f23 hangs
ssh -Y laptop glxinfo
 * Connection from virtual f23 to laptop works

There is either some other factor in this use case (hardware?). Moving to mesa-demos, which is providing this executable.

Comment 3 Ian Collier 2016-05-19 10:38:56 UTC

OK, on a fully updated Fedora 23 workstation *except* for
xorg-x11-drv-intel-2.99.917-16.20150729.fc23 this hang does
not occur.  Update to xorg-x11-drv-intel-2.99.917-19.20151206.fc23
and it hangs.

In addition I have unrelatedly discovered today that Matlab R2016a
hangs when you try to quit it.  But downgrade xorg-x11-drv-intel
to 16.20150729.fc23 and the Matlab hang doesn't happen either.

Comment 4 Ian Collier 2016-05-19 10:49:51 UTC

This now appears to be a duplicate of Bug 1317251.

Comment 5 Ian Collier 2016-07-18 13:46:26 UTC

I also note that this issue goes away if Options "DRI" "2" is added
to the Xorg config.

Comment 6 Fedora End Of Life 2016-11-25 09:03:40 UTC

This message is a reminder that Fedora 23 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 23. 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 '23'.

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 23 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 
bugs or makes them obsolete.

Comment 7 Fedora End Of Life 2016-12-20 20:32:04 UTC

Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.