** No longer affects: xorg-server (Ubuntu Bionic)
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Title:
Xorg's Indirect GLX broken from upstream regression
Status in
Fixed upstream in xorg-server 1.20.8
---
xorg-server (2:1.20.8-2ubuntu2) focal; urgency=medium
* randr-auto-bind-of-gpu-is-a-config-change.diff: Backport GPU hotplug
RandR fix. (LP: #1862753)
xorg-server (2:1.20.8-2ubuntu1) focal; urgency=medium
* Merge from Debian.
*
** Tags added: regression-release
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Title:
Xorg's Indirect GLX broken from upstream regression
Status in X.Org X server:
** Tags removed: fixed-upstream
** Tags added: patch-accepted-upstream
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Title:
Xorg's Indirect GLX broken from upstream
Tagging rls-ff-notfxing, the bug is not important enough to be rls
tracked. Still it's in the sponsoring queue and hopefully gets fixed
before focal is out
** Tags removed: champagne
** Tags added: rls-ff-notfixing
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** Changed in: xorg-server (Ubuntu)
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
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Title:
Xorg's Indirect GLX
Great to hear.
I don't have any power to help get this released sooner. It looks like
you've done everything right for an SRU, and Timo (who handles Xorg) is
already aware of it.
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both changes are now in upstream Xorg's repository, as PR388 was merged
a few hours ago. So the changes in this debdiff are a backport of those
to Bionic, Eoan and Focal (although if Focal were to sync with the
upstream code then the delta won't be necessary going forward).
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The secondary crash doesn't occur without the first fix. You cannot
reach it until the first fix is applied. However, I suppose it is in a
different bit of code, but it is only reached when you use indirect GLX
and prevents you using indirect GLX which is what this issue is
attempting to fix.
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I can't find any existing reports of that secondary crash, but ideally
it would not usually be part of the fix here...
I guess it's OK if the secondary crash was impossible without the first
fix. If it wasn't then ideally a new bug should be opened to describe
that and both bugs mentioned in the
This debdiff for Eoan fixes the follow-on crash (on client close) that
was unearthed by fixing the first crash (on client start).
** Patch added: "refreshed debdiff for eoan"
The refreshed patches fix both crashes. The first change is upstream
commit e1fa3be [1] and the second change is from upstream PR 388 [2].
@Sponsors, this is now good to go from my point of view.
[1]
https://gitlab.freedesktop.org/xorg/xserver/commit/e1fa3beb2fe2519e69f859f0acdc68e5a770de27
[2]
This debdiff for Focal fixes the follow-on crash (on client close) that
was unearthed by fixing the first crash (on client start).
** Patch added: "refreshed debdiff for focal"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323933/+files/xorg-server_1.20.6-1ubuntu2.debdiff
This debdiff for Bionic fixes the follow-on crash (on client close) that
was unearthed by fixing the first crash (on client start).
** Patch added: "refreshed debdiff for bionic"
** Changed in: xorg-server
Status: New => Fix Released
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Title:
Xorg's Indirect GLX broken from upstream regression
The new crash backtrace:
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x7fb60370c899 in __GI_abort () at abort.c:79
#2 0x560aacd068c0 in OsAbort () at ../../../../os/utils.c:1351
#3 0x560aacd0c4f9 in AbortServer () at
I've built this locally and tested it. While it improves matters, it is
still incomplete to get IGLX working fully - there is a new crash at the
point you close the IGLX-using application instead of immediately upon
starting it. This fix is still warranted, however, because it does
improve things.
There are, thankfully, seemingly no regressions in unrelated areas :-)
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Title:
Xorg's Indirect GLX broken from upstream
** Changed in: xorg-server (Ubuntu)
Importance: Undecided => Medium
** Changed in: xorg-server (Ubuntu)
Status: Confirmed => Triaged
** Tags added: fixed-upstream
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** Tags added: champagne
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Title:
Xorg's Indirect GLX broken from upstream regression
Status in X.Org X server:
New
Status
** Summary changed:
- Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl programms to crash
+ Xorg's Indirect GLX broken from upstream regression
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** Patch added: "debdiff for eoan"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323650/+files/xorg-server_1.20.5+git20191008-0ubuntu2.debdiff
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** Patch added: "debdiff for focal"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323651/+files/xorg-server_1.20.6-1ubuntu2.debdiff
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** Patch removed: "re-rolled debdiff for focal"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323646/+files/xorg-server_1.20.6-1ubuntu2.debdiff
** Description changed:
[Impact]
* IGLX is a way for an opengl application sending the 3D drawing GLX
commands to the
** Attachment removed: "debdiff for eoan"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323647/+files/xorg-server_1.20.5+git20191008-0ubuntu1.dsc
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** Attachment added: "debdiff for eoan"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323647/+files/xorg-server_1.20.5+git20191008-0ubuntu1.dsc
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** Patch removed: "debdiff for focal"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323645/+files/xorg-server_1.20.6-1ubuntu2.debdiff
** Patch added: "re-rolled debdiff for focal"
** Patch added: "debdiff for focal"
https://bugs.launchpad.net/xorg-server/+bug/1776447/+attachment/5323645/+files/xorg-server_1.20.6-1ubuntu2.debdiff
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** Description changed:
+ [Impact]
+
+ * IGLX is a way for an opengl application sending the 3D drawing GLX
+ commands to the Xorg server for rendering instead of using the DRI
+ infrastructure it is commonplace for High Performance Compute and
+ Scientific institutions to use this feature of
The attachment "xorg-server-iglx.diff" seems to be a patch. If it
isn't, please remove the "patch" flag from the attachment, remove the
"patch" tag, and if you are a member of the ~ubuntu-reviewers,
unsubscribe the team.
[This is an automated message performed by a Launchpad user owned by
That would be excellent - thanks! IGLX is one of those things probably
not many people use, but those of us who do kind of really need it. It
also seems to be a thing in HPC / research circles:
https://www.phoronix.com/scan.php?page=news_item=Xorg-IGLX-Potential-
Bye-Bye
FWIW, I'm now (finally)
This is the upstream patch. It changes the return from
__glXDRIcontextWait from hardcoded -1 to noClientException which will
either be -1 or nothing. This is the pre-2016 behaviour that is being
restored.
** Patch added: "xorg-server-iglx.diff"
A fix has now landed upstream. I think this could be a candidate for an
SRU cherry-pick for every supported release back to Xenial. The upstream
commit is
https://gitlab.freedesktop.org/xorg/xserver/commit/e1fa3beb2fe2519e69f859f0acdc68e5a770de27.
It's a very simple one-line change and is merely a
** Changed in: xorg-server
Status: Unknown => New
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Title:
Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl
** Tags added: disco eoan
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Title:
Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl programms to
crash
Status in X.Org
** Bug watch added: gitlab.freedesktop.org/xorg/xserver/issues #211
https://gitlab.freedesktop.org/xorg/xserver/issues/211
** Changed in: xorg-server
Importance: Medium => Unknown
** Changed in: xorg-server
Remote watch: freedesktop.org Bugzilla #99555 =>
** Changed in: xorg-server
Status: Confirmed => Unknown
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Title:
Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl
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Somewhere between 1.19 and version 1.20.1 this has goten worse. The Xorg
server now crashes after LIBGL_ALWAYS_INDIRECT=1 glxgears. Log attached.
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Created attachment 141901
Xorg log from iglx crash
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Title:
Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes opengl programms to
I've hit this on Ubuntu 18.04 (xorg 1.19.6), modesetting driver. I have
opened a bug over there in case someone on that side has time to
investigate (https://bugs.launchpad.net/ubuntu/+source/xorg-
server/+bug/1776447)
Interestingly, if I use VirtualGL as a true GLX proxy..
VGL_READBACK=sync
** Changed in: xorg-server (Ubuntu)
Status: New => Confirmed
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Title:
Indirect GLX (LIBGL_ALWAYS_INDIRECT=1) causes
Launchpad has imported 8 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=99555.
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Public bug reported:
There's already an upstream bug report here:
https://bugs.freedesktop.org/show_bug.cgi?id=99555
Basically, with Option "IndirectGLX" "True" and LIBGL_ALWAYS_INDIRECT=1
I get immediate crashes e.g. with glxgear:
steved@xubuntu:~$ LIBGL_ALWAYS_INDIRECT=true glxgears
Running
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