linux-kernel - Re: [git pull] Input updates for 2.6.34-rc6

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Date:	Fri, 14 May 2010 12:05:26 -0700 (PDT)
From:	david@...g.hm
To:	Matthew Garrett <mjg59@...f.ucam.org>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org, Bastien Nocera <hadess@...ess.net>
Subject: Re: [git pull] Input updates for 2.6.34-rc6

On Fri, 14 May 2010, david@...g.hm wrote:

> On Fri, 14 May 2010, Matthew Garrett wrote:
>
>> On Fri, May 14, 2010 at 11:47:43AM -0700, david@...g.hm wrote:
>> 
>>> yes, everything has USB ports, so they could use USB keyboards, but it's
>>> actually pretty common to still use PS/2 keyboards (and while the systems
>>> all support USB, it's not uncommon to have KVM systems, including pretty
>>> expensive 'enterprise' KVM systems that still require PS/2 keyboards be
>>> used to plug into the KVM, so those are the keyboards that are in the
>>> datacenter that someone will grab to plug into a problem machine)
>> 
>> The server hardware I've looked at will all declare the ports regardless
>> of whether or not there's something plugged in.
>
> remember that many people use systems in datacenters that are not 'server 
> hardware'.
>
> when a desktop PC can have 4-6 cores with 8G+ of ram and a couple TB of 
> storage, a lot of people will end up using those systems for production.
>
> As they grow into bigger companies they will shift to 'server class' 
> hardware, but startups tend to use whatever they can scrounge (or buy 
> _really_ cheap)

By the way, for what it's worth I think it's a very bad idea to hot-plug 
PS/2 keyboards. The hardware may be better nowadays, but back when I was a 
PC repair tech I made very good money replacing the fuses on motherboards 
that would blow because someone hot-plugged the keyboard.

That said, there are times when it happens, and many people don't see any 
problem with it.

David Lang
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