[Mesa-dev] [Bug 110903] Can't start mutter or GDM with wayland

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110903

Michel Dänzer <michel at daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|mesa-dev at lists.freedesktop. |
                   |org                         |
            Product|Mesa                        |DRI
                 CC|                            |ckoenig.leichtzumerken at gmai
                   |                            |l.com
          Component|EGL                         |libdrm
            Version|git                         |unspecified

--- Comment #5 from Michel Dänzer <michel at daenzer.net> ---
It breaks because the cached amdgpu_device unavoidably uses a different DRM
file descriptor from the one mutter uses for KMS (which it gets independently
from libdrm(_amdgpu)/EGL/GBM), so GEM objects created in the former aren't
visible in the latter.

The libdrm_amdgpu patch I attached makes this particular case work, because the
two file descriptors are for different DRM node types (render vs. card). But it
could still break if the cached amdgpu_device is for the same node type as the
new file descriptor passed in.

Christian, can you remind us in what cases re-using a cached admgpu_device is
required?

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