[Bug 97916] Dual monitors unusable with DRI3 on Ivy Bridge

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Sep 27 14:26:50 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=97916

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
Mesa/dri3 has its own event/hook XCB_PRESENT_CONFIGURE_NOTIFY which it requires
to notice the change in back buffer size. If that was missed, the compositor
would be rendering the new size but only the original size would be shown -
that would be easy to see. dri3_get_buffer() would be the right spot to add
printfs to see what was going on.

Compiling xf86-video-intel with ./configure --enable-debug=full would generate
a huge Xorg.log from which we can check what size of pixmap is being rendered.
But again not why.

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