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Based on radeon commit: 802d33e474a82262d9cdf11b03568b0c4929cd0d It's not always possible to use the page flip ioctl for this, e.g. during DPMS off. We were previously just skipping the unflip in that case, which could result in hangs when setting DPMS off while a fullscreen Present app is running, e.g. at the GNOME3 lock screen. Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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