White broke a 1-1 tie at 12:04 of the third period.
Overall, they had lost eight of their previous 11 games.
Buffalo's only goal came from Toni Lydman at 6:02 of the first period.
Ryan Miller yielded two goals on 33 shots for the Sabres, who had won three of their previous four home contests.
On the power play, both clubs went 0-for-4.
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