linux-kernel - Re: Bug#514464: caps lock led does not show up

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Message-ID: <20150611080809.GD3184@type.bordeaux.inria.fr>
Date:	Thu, 11 Jun 2015 10:08:09 +0200
From:	Samuel Thibault <sthibault@...ian.org>
To:	Anton Zinoviev <anton@....bas.bg>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Pavel Machek <pavel@....cz>,
	Pali Rohár <pali.rohar@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	rpurdie@...ys.net, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	514464@...s.debian.org
Subject: Re: Bug#514464: caps lock led does not show up

Hello,

Anton Zinoviev, le Tue 09 Jun 2015 19:03:39 +0300, a écrit :
> On Tue, Jun 09, 2015 at 04:17:23PM +0200, Samuel Thibault wrote:
> > 
> > Dmitry Torokhov, le Mon 08 Jun 2015 14:43:07 -0700, a écrit :
> > > If user wants all keyboards to light up CapsLock LED when VT state locks
> > > CtrlL modifier they need to write a udev rule or similar to set up
> > > "kbd-ctrlllock" trigger for all appearing "input%::capslock" LED class
> > > devices.
> > 
> > Anton, this is the interface proposed by the input maintainer, Dmitry,
> > to change which modifiers gets to light the keyboard LEDs (the exact
> > names may change, but the principle should be firm).  I know this is
> > inconvenient for console-setup for handling hotplugged keyboards,
> 
> Ok, the inconvenience is not a problem.  The problem is I don't 
> understant the meaning of this. :)
> 
> Is there some documentation or a sample code I can read?

Putting

SUBSYSTEM=="leds", ENV{DEVPATH}=="*/input*::capslock", ATTR{trigger}="kbd-ctrlllock"

in /etc/udev/rules.d/50-leds.rules seems to be doing the work. It'd be
good to include this in the documentation along the patch.

Samuel
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