Date: Wed, 3 Sep 2014 10:34:21 -0400 From: Ed Maste <emaste@freebsd.org> To: Alexey Dokuchaev <danfe@freebsd.org> Cc: svn-src-stable@freebsd.org, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, svn-src-stable-10@freebsd.org Subject: Re: svn commit: r271023 - stable/10/sys/dev/vt Message-ID: <CAPyFy2B8F_mWOeTGXormEQ2amzQ00rFotmsNpXmgaKTy63DYzA@mail.gmail.com> In-Reply-To: <20140903140757.GA7494@FreeBSD.org> References: <201409031400.s83E0bK6049810@svn.freebsd.org> <20140903140757.GA7494@FreeBSD.org>
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On 3 September 2014 10:07, Alexey Dokuchaev <danfe@freebsd.org> wrote: > On Wed, Sep 03, 2014 at 02:00:37PM +0000, Ed Maste wrote: >> New Revision: 271023 >> URL: http://svnweb.freebsd.org/changeset/base/271023 >> >> Log: >> MFC r270280 by dumbbell: vt(4): Pause the flush timer while swithing window >> >> This fixes bad looking refresh when switching window: squares instead >> of text, flashing screen, and so on. In the worst case, vt_flush() came >> at a very inappropriate timing and the screen was not refreshed at all >> (leaving squares all over the place). >> >> This doesn't fix the flickering of the screen with vt_vga, because the >> sync signal is temporarily stopped and the video memory is cleared. > > Will this improve the current situation with switching ttys on the console? > Right now it takes considerable time to switch, and sometimes the image is > not properly restored. This should address the corruption on vt switch; I don't believe it will have an effect on the switching time. > I'm also wondering why on PowerPC vt(4) behaves much better (switching is > instant, no artifacts at all). The VGA vt(4) issues all stem from the relatively complex and arcane VGA hardware and a somewhat limited vt_vga implementation. Most of the issues have been sorted out in HEAD by dumbbell@ and those are in the pipeline to be merged.
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