[Bug 94250] Intel driver crashes when undocking Lenovo T450s

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94250

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
Hmm. First thought is that the kernel returned an event for an operation that
failed, can you please quickly try with

diff --git a/src/sna/sna_dri2.c b/src/sna/sna_dri2.c
index fcfbd9d..7db6f61 100644
--- a/src/sna/sna_dri2.c
+++ b/src/sna/sna_dri2.c
@@ -1914,6 +1914,7 @@ sna_dri2_flip(struct sna_dri2_event *info)
                return false;
        }

+       assert(!info->queued);
        if (!sna_page_flip(info->sna, bo, sna_dri2_flip_handler,
                           info->type == FLIP_ASYNC ? NULL : info))
                return false;

and --enable-debug.

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