[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Andrej via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #12 from Andrej  ---
@Martin: You're right, a package dependency didn't resolve properly during an
upgrade it seems. Thanks and sorry for false alarm.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #11 from Martin Gräßlin  ---
@Andrej: if llvmpipe is loaded it means that the driver doesn't work. That's a
setup problem and completely unrelated to the problem described in this bug
report.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Andrej via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

Andrej  changed:

   What|Removed |Added

 CC||and...@cremoznik.si

--- Comment #10 from Andrej  ---
In my case Kwin doesn't even seem to recognize the presence of the nvidia
driver.

I have an NVS 510 card with 370.28 driver. The driver loads fine but Kwin uses
the LLVMpipe. This is happening with KF 5.8.0, was fine before.

Not sure if it's related to this bug or should I open another one. More
detailed report on https://bbs.archlinux.org/viewtopic.php?id=218038

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Joe via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #9 from Joe  ---
So, I have an affected system, but not the slightest knowledge of OpenGL,
unfortunately - last time I came close to that was messing around with SDL 1.2
years ago.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #8 from Martin Gräßlin  ---
>  Also, let me know if you need anymore help debugging for the "real" fix.

Sure, we would love to figure out what's the real problem. For that we need
someone with an affected system and slight knowledge about OpenGL. Something is
going wrong when rendering the first frame - some state being wrong, incorrect
fencing, something like that. So it needs someone to go through the rendering
of the first frame to figure that one out.

Unfortunately creating patches and passing them to someone else for testing
doesn't bring us anywhere - we tried that already.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Joe via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #7 from Joe  ---
Just wanted to chime in - working now on 5.7.5 and the 5.8 beta. Also, let me
know if you need anymore help debugging for the "real" fix.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Jason A . Donenfeld via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

Jason A. Donenfeld  changed:

   What|Removed |Added

 CC||ja...@zx2c4.com

--- Comment #6 from Jason A. Donenfeld  ---
> The self test fails with NVDIDA 370.23 or newer on Quadro hardware.
> Most likely there is a bug in our code as the same things work later on.
> But without the hardware we are not able to reproduce and investigate
> properly. Given that all we currently can do is to skip the self test.

I'm happy to help you fix this bug for real. Ping me on IRC -- #zx2c4 -- and we
can run various tests.

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #5 from Martin Gräßlin  ---
Git commit e9e936b6c1bde338fb51ea3ada0897ad70055c44 by Martin Gräßlin.
Committed on 12/09/2016 at 11:13.
Pushed by graesslin into branch 'Plasma/5.7'.

[kwinglutils] Skip ShaderManager::selfTest for NVIDIA Quadro hardware

Summary:
The self test fails with NVDIDA 370.23 or newer on Quadro hardware.
Most likely there is a bug in our code as the same things work later on.
But without the hardware we are not able to reproduce and investigate
properly. Given that all we currently can do is to skip the self test.

We encourage users to investigate this properly and to help us to
identify the root issue, so that we can fix it.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D2744

M  +4-0libkwineffects/kwinglutils.cpp

http://commits.kde.org/kwin/e9e936b6c1bde338fb51ea3ada0897ad70055c44

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

Martin Gräßlin  changed:

   What|Removed |Added

URL||https://phabricator.kde.org
   ||/D2744

--- Comment #4 from Martin Gräßlin  ---
Workaround for the issue at https://phabricator.kde.org/D2744

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

--- Comment #3 from Martin Gräßlin  ---
Adding some useful debug output which teo just provided me:
% kwin_x11 --replace
QXcbConnection: XCB error: 3 (BadWindow), sequence: 3651, resource id:
10485848, major code: 18 (ChangeProperty), minor code: 0
OpenGL vendor string:   NVIDIA Corporation  
OpenGL renderer string: Quadro M2000M/PCIe/SSE2 
OpenGL version string:  3.1.0 NVIDIA 370.23
OpenGL shading language version string: 1.40 NVIDIA via Cg compiler
Driver: NVIDIA
Driver version: 370.23
GPU class:  Unknown
OpenGL version: 3.1
GLSL version:   1.40
X server version:   1.18.4
Linux kernel version:   4.7.1
Requires strict binding:no
GLSL shaders:   yes
Texture NPOT support:   yes
Virtual Machine:no
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
kwin_core: ShaderManager self test failed
kwin_core: Failed to initialize compositing, compositing disabled


We can see it hits the shader self test failure

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Martin Gräßlin via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

Martin Gräßlin  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
  Flags||NVIDIA+
 Resolution|--- |UPSTREAM

--- Comment #2 from Martin Gräßlin  ---
> Compositing should work. Worked with previous driver (367.35).

So I understand correctly that this is a driver regression? Then you should
report it against NVIDIA. Sorry but if our code didn't change it's hardly a
problem we can solve.

>From the detection it looks everything is fine - everything is detected
correctly.

Nevertheless thanks to making us aware of that problem, we might need to tell
people about it...

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[kwin] [Bug 367766] Compositing won't start with Nvidia 370.23 drivers on Quadro card.

[Joe via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367766

Joe  changed:

   What|Removed |Added

 CC||jchevar...@gmail.com

--- Comment #1 from Joe  ---
I have the same issue with my Quadro M1000M. I created this bug in Arch:
https://bugs.kde.org/show_bug.cgi?id=367766

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