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From: Aleksandr Rybalko <ray@ddteam.net>
Date: Mon, 15 May 2017 16:58:54 +0300
Message-ID: <CAJ1Oi8HF5x1TQFkr1ckML7GaFqr_a8xqpHE1rE00x1isMQO0Sw@mail.gmail.com>
Subject: Re: vt(4) odd scrolling behavior
To: Kyle Evans <kevans91@ksu.edu>
Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, 
 freebsd-current Current <freebsd-current@freebsd.org>
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Looks like video driver reports double buffer as single frame buffer, so vt
draw it as big screen, but video card draw it as two layers.