Nouveau - Feb 2015 - [Bug 89019] New: Black texture using Qt5

https://bugs.freedesktop.org/show_bug.cgi?id=89019

            Bug ID: 89019
           Summary: Black texture using Qt5
           Product: Mesa
           Version: 10.4
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: andrea at archlinux.org
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 113241
  --> https://bugs.freedesktop.org/attachment.cgi?id=113241&action=edit
Screenshot of Plasma 2

Hi there,
I don't know where to start because I just migrated to Plasma 2 and got this
black texture (see attachment).

Everything is fine using Qt4, so I suppose this could be a Qt issue? But then I
used vesa as Xorg driver and the texture is painted correctly.
The same black texture is used in SDDM too, which is also a Qt5 application.

Any idea on where to start?

NVIDIA FX 5500, Xorg 1.16.3, mesa 10.4.4, nouveau 1.0.11, Qt 5.4.0

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
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 Attachment #113241|text/plain                  |image/png
          mime type|                            |

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--- Comment #1 from Andrea Scarpino <andrea at archlinux.org> ---
(In reply to Andrea Scarpino from comment #0)
> NVIDIA FX 5500, Xorg 1.16.3, mesa 10.4.4, nouveau 1.0.11, Qt 5.4.0
Still the same with Xorg 1.17.1, mesa 10.4.5, Qt 5.4.1

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Black texture using Qt5     |[NV30/Gallium] Black
                   |                            |texture using Qt5

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
The thing immediately coming to mind was the workaround I added for dealing
with mismatching color/depth render targets. The "fix" was to just not
render
to depth at all, but that may mess up other things of course. (Not the least of
which is that the depth texture will remain untouched.)

To start, you should get an apitrace (https://github.com/apitrace/apitrace) of
the failing application. This should help determine what's going on. Make a
debug mesa build and see if the driver outputs any "aaaah, i don't know
how to
handle this" type messages.

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GitLab Migration User <gitlab-migration at fdo.invalid> changed:

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

--- Comment #3 from GitLab Migration User <gitlab-migration at
fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1070.

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