[Nouveau] [Bug 105525] New: Freeze when playing videos in WebKit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105525

            Bug ID: 105525
           Summary: Freeze when playing videos in WebKit
           Product: Mesa
           Version: 17.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: link.dupont at gmail.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 138134
  --> https://bugs.freedesktop.org/attachment.cgi?id=138134&action=edit
Epiphany/WebKit logs

My Wayland desktop session freezes when I load a web video (for example,
YouTube) in a WebKitProcess Epiphany.

== Steps to Reproduce ==

1. Log into a Wayland session
2. Launch Epiphany
3. Load a youtube.com video

== Expected Results ==

The video plays.

== Actual Results ==

The desktop freezes until I remotely connect to the computer over SSH and kill
the WebKitProcess process rendering the content.

== Notes ==

This can be avoided by running epiphany with WEBKIT_DISABLE_COMPOSITING_MODE=1
set, which leads me to believe it is a nouveau bug (rather than a WebKit bug).
I've attached logs with Epiphany output. These two lines are particularly
concerning:

> Mar 15 07:20:03 bant org.gnome.Epiphany.desktop[14459]: WebKitWebProcess: pushbuf.c:727: nouveau_pushbuf_data: Assertion `kref' failed.
> Mar 15 07:20:16 bant org.gnome.Epiphany.desktop[14459]: nouveau: kernel rejected pushbuf: Device or resource busy

=== mesa version ===
mesa-dri-drivers.i686                17.3.6-1.fc27              @updates        
mesa-dri-drivers.x86_64              17.3.6-1.fc27              @updates        
mesa-filesystem.i686                 17.3.6-1.fc27              @updates        
mesa-filesystem.x86_64               17.3.6-1.fc27              @updates        
mesa-libEGL.x86_64                   17.3.6-1.fc27              @updates        
mesa-libGL.x86_64                    17.3.6-1.fc27              @updates        
mesa-libGLU.x86_64                   9.0.0-13.fc27              @fedora         
mesa-libOpenCL.x86_64                17.3.6-1.fc27              @updates        
mesa-libgbm.x86_64                   17.3.6-1.fc27              @updates        
mesa-libglapi.i686                   17.3.6-1.fc27              @updates        
mesa-libglapi.x86_64                 17.3.6-1.fc27              @updates        
mesa-libwayland-egl.x86_64           17.3.6-1.fc27              @updates        
mesa-libwayland-egl-devel.x86_64     17.3.6-1.fc27              @updates        
mesa-libxatracker.x86_64             17.3.6-1.fc27              @updates 

=== NVIDIA card ===
$ lspci | grep NV                                                               
01:00.0 VGA compatible controller: NVIDIA Corporation GK104M [GeForce GTX 775M
Mac Edition] (rev a1)

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