Nouveau - May 2011 - [Bug 37042] New: the blur effect in kwin does not work with the git version of the 3-d nouveau driver

https://bugs.freedesktop.org/show_bug.cgi?id=37042

           Summary: the blur effect in kwin does not work with the git
                    version of the 3-d nouveau driver
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: jsardid at gmail.com


Hi,

I'm using libgl1-mesa-dri-experimental
7.11.0+git20110509.7074801e-0ubuntu0sarvatt from the [xorg-edgers] ppa
(https://edge.launchpad.net/~xorg-edgers/+archive/ppa) because it works great
in kubuntu natty (when using the default stable version of the driver I suffer
from random lockups and performance is also worse). I'm very happy using the
git version to remove all these problems, but on the other side there is an
issue with the blur desktop effect which is not working anymore in kwin when
using the git version (it works with the default stable version). This is
especially bad when transparency is enabled, which is my case. I wouldn't
like
to have to renounce to nouveau by nvidia, nor to the benefits of the git
version and I really enjoy transparency when the blur effect is working
properly, so please let me know if there is any way I can help to solve this
issue.

Thanks in advance,
Salva

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--- Comment #1 from jsardid at gmail.com 2011-05-09 16:46:36 PDT ---
I have also filed the bug in kde: https://bugs.kde.org/show_bug.cgi?id=272899

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--- Comment #2 from maximlevitsky at gmail.com 2011-05-09 16:56:21 PDT ---
Well that is well known problem due to kwin including hacks parsing GL renderer
version.
See here: http://www.phoronix.com/scan.php?page=news_item&px=OTM1NQ

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--- Comment #3 from maximlevitsky at gmail.com 2011-05-09 16:57:11 PDT ---
Or to follow a link rather that:
http://www.phoronix.com/scan.php?page=news_item&px=OTM0NA

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maximlevitsky at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |NOTOURBUG

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--- Comment #4 from jsardid at gmail.com 2011-05-09 17:06:04 PDT ---
I heard something but I thought it was related to the intel driver not nouveau.
so, are you saying it is the same problem here?

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--- Comment #5 from maximlevitsky at gmail.com 2011-05-09 17:26:49 PDT ---
It 'affects' whole mesa, because now mesa reports different driver
version if
different format, and kwin relied on that, although version string is
information for user only that shouldn't be parsed.
I use nouveau too here.
(BTW, note that on my card, the nvidia driver hangs kwin hard everytime I use
it... and nouveau doesn't...)

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--- Comment #6 from jsardid at gmail.com 2011-05-09 18:51:24 PDT ---
I see. I'm actually very happy with the nouveau driver now that it's
really
stable.

Thanks for the information

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--- Comment #7 from jsardid at gmail.com 2011-05-10 13:26:45 PDT ---
It's curious that mesa developers say it's a downstream bug and kde
developers
say it's upstream

I write the comment on the two sides to see if we together can clarify the
issue

https://bugs.freedesktop.org/show_bug.cgi?id=37042
https://bugs.kde.org/show_bug.cgi?id=272899

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--- Comment #8 from jsardid at gmail.com 2011-05-10 13:46:26 PDT ---
Ok, I apologize, as you said it seems it's not related with the mesa driver
at
all: I removed the transparency in the oxygen transparent decoration and blur
effect came back to kde, so it seems the issue is in the oxygen transparent
decoration.

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--- Comment #9 from jsardid at gmail.com 2011-05-10 14:16:03 PDT ---
What a mess! I just tried again with oxygen transparent decoration and it's
working, so most surely it was a small regression in the nouveau driver
(Texture NPOT support), which has been fixed very fast, so my new git version
is working properly (libgl1-mesa-dri-experimental         
7.11.0+git20110510.d6b24865-0ubuntu0sarvatt)

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Lucas Stach <dev at lynxeye.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|NOTOURBUG                   |FIXED

--- Comment #10 from Lucas Stach <dev at lynxeye.de> 2011-05-10 14:32:19
PDT ---
This was a bug in the nv50 mesa driver, fixed by
d6b248652a7b2c9c3e83a5f2188ce0ac77176bf0.

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