linux-kernel - Re: Keyboard driver not refreshing settings when unplugged.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20091127012249.GI6936@core.coreip.homeip.net>
Date:	Thu, 26 Nov 2009 17:22:49 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Robert Hancock <hancockrwd@...il.com>
Cc:	Vincent Perricone <vhp@...falo.edu>, linux-kernel@...r.kernel.org
Subject: Re: Keyboard driver not refreshing settings when unplugged.

On Thu, Nov 12, 2009 at 08:04:47PM -0600, Robert Hancock wrote:
> On 11/11/2009 11:50 PM, Vincent Perricone wrote:
>> I noticed a bug which may possibly be part of the Linux kernel.  If
>> one were to enable a setting on the keyboard(caps lock) and then
>> unplug that keyboard.  Upon re-plugging it in or another, the system
>> will still keep caps lock enabled.  When the user then goes and
>> enables caps lock on their own keyboard which assumes the setting is
>> disabled, the system then turns caps lock off, even though the user
>> wanted it on.
>>
>> 2.6.31-14-generic
>
> USB or PS/2 keyboard? I don't know that the kernel even can tell if a  
> PS/2 keyboard has been unplugged or not..

Depends on the box. PS/2 devices normally send 0xaa 0x00 when plugged in
but that may get suppressed, especially on laptops.

-- 
Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/