linux-kernel - Re: [PATCH v4 0/2] fbcon: user-defined cursor blink interval

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Message-ID: <alpine.DEB.2.11.1501262331180.1638@localhost.localdomain>
Date:	Tue, 27 Jan 2015 01:06:29 +0000 (UTC)
From:	Scot Doyle <lkml14@...tdoyle.com>
To:	Richard Weinberger <richard@....at>
cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Richard Weinberger <richard.weinberger@...il.com>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/2] fbcon: user-defined cursor blink interval

On Tue, 27 Jan 2015, Richard Weinberger wrote:

> Am 27.01.2015 um 00:09 schrieb Scot Doyle:
> > Since users prefer different fbcon cursor blink intervals, allow the
> > interval to be set via sysfs. The current interval of 200 milliseconds
> > is retained as the default. Tested with intelfb.
> > 
> > v2:  Use kstrtos16() instead of kstrtoul() and min_t() as suggested by
> >      Geert Uytterhoeven
> > v3:  Add error messages as suggested by Tomi Valkeinen
> > v4:  Add rationale into patch descriptions as suggested by
> >      Richard Weinberger
> 
> Hehe, no need to resend immediately a v4, I'm just curios about the use case. :)
> Why do users want a different blink interval? What is the use case?
> And what are these users? Most people use a fbcon only for a few moments
> to fix/restart X11.
> 
> Thanks,
> //richard

Ah, I see! With multiple ncurses windows, some of which contain reversed 
characters, a blinking underscore is helpful for locating the cursor.
But, the 200 millisecond interval can be distracting. Another example is 
http://unix.stackexchange.com/questions/55423/how-to-change-cursor-shape-color-and-blinkrate-of-linux-console
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