[Bug 69119] GPU hangs during full screen games on multi-monitor setup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69119

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
Does this do anything:

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index be02a78..f94799f 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -3392,6 +3392,12 @@ static bool sna_emit_wait_for_scanline_hsw(struct sna
*sna,
        b = kgem_get_batch(&sna->kgem);
        sna->kgem.nbatch += 5;

+       /* Reduce the range slightly to accommodate some latency
+        * in detection: https://bugs.freedesktop.org/show_bug.cgi?id=69119
+        */
+       y1 = (y1 + 7) & ~7;
+       y2 = (y2 - 7) & ~7;
+
        /* The documentation says that the LOAD_SCAN_LINES command
         * always comes in pairs. Don't ask me why. */
        switch (pipe) {

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