commit 'dri2: Send out event when auxillary buffers are invalidated' breaks nouveau 3D support

[Maxim Levitsky]

Hi,

It could be my mistake, but I have uptodate versions
of xproto, dri2proto, xserver, nouveau ddx, mesa, libdrm.

Still the above commit makes X not load nouveau dri module, and fallback
to swrast_dri.so.

Nothing in X logs, but that 'Screen is not AIGLX capable'

Best regards,
Maxim Levitsky