linux-kernel - Re: [PATCH v7 0/3] console: Add persistent scrollback buffers for all VGA consoles

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Message-ID: <20161129100115.GA20034@stationary.pb.com>
Date:   Tue, 29 Nov 2016 10:01:15 +0000
From:   Andrey Utkin <andrey_utkin@...tmail.com>
To:     Manuel Schölling <manuel.schoelling@....de>
Cc:     plagnioj@...osoft.com, tomi.valkeinen@...com, jslaby@...e.cz,
        gregkh@...uxfoundation.org, kilobyte@...band.pl,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/3] console: Add persistent scrollback buffers for
 all VGA consoles

On Mon, Nov 28, 2016 at 10:28:19PM +0100, Manuel Schölling wrote:
> Hi Andrey,
> 
> Adam already discussed some of your notes, but I want to catch up one
> this one:
> 
> On So, 2016-11-27 at 21:37 +0000, Andrey Utkin wrote:
> > I see the user experience is subpar to what I'm accustomed to (I use
> > Konsole and "Clear Scrollback and Reset" action, default shortcut is
> > Ctrl+Shift+K). The strange behaviour moments have nothing to do with
> > current patchset but are properties of vgacon, though. (I compared it
> > with another PC which runs without this patchset, and it looks like it
> > runs vgacon, too, however, I'm not sure how to ensure this at runtime.)
> I'm not sure what you mean with 'subpar'. Ctrl+Shift+K would probably be
> nice - but it might interfere with some shortcuts of programs.
> Are you missing any other features?
> (I am working on persistent scrollback for framebuffer consoles in the
> mean time...)

I meant that in my terminal of choice, I have single action which does
both of these things at same time:
 - scrollback cleaning (also not leaving screen worth of emptiness in
   scrollback)
 - prompt positioning to top line

That's all. I don't appeal to bring Ctrl+Shift+K hotkey or whatever
else.

Since these cosmetic matters are inherent to vgacon I'm fine with it.

Regarding logout scrollback clearing not working for me. ncurses-6.0-rc1
which I tested it with is the latest available in Gentoo portage, please
confirm whether I need any newer version, or should I tune something
else. I'd appreciate if you also tested your patch with gentoo setup.