Timeout: AT keyboard not present?

Timeout: AT keyboard not present?

[Jesús Carrete Montaña]

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I receive this message very often in console, in every situation: when
I'm coding and when I'm playing tetrinet. It's quite annoying, mostly
because it fills my screen of garbage (I'll have to buy a new CTRL and
L keys). What's the prolem? It only happens (I think) with >2.2.17
kernels (including 2.4.0-test12).
Please let me know if you need more information.

Un saludo.
- -- 
"I use free software."| ¡Feliz Navidad y buen 2001!
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- -- Versions installed: (if some fields are empty or look
- -- unusual then possibly you have very old versions)
Linux relativistic 2.4.0-test12-withoutfb #1 sáb dic 23 02:39:30 CET 2000 i586 unknown
Kernel modules         2.3.19
Gnu C                  2.95.2
Gnu Make               3.79.1
Binutils               2.9.5.0.37
Linux C Library        > libc.2.2
Dynamic linker         ldd (GNU libc) 2.2
Procps                 2.0.6
Mount                  2.10q
Net-tools              2.05
Console-tools          0.2.3
Sh-utils               2.0i
Modules Loaded         adlib_card opl3 sb sb_lib uart401 sound soundcore lp nls_iso8859-15 nls_cp437
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Re: Timeout: AT keyboard not present?

[Stefan Frank]

Hi Jes=FAs?=!

On Sat, 30 Dec 2000, Jes=FAs?= Carrete Montaña wrote:

> 
> I receive this message very often in console, in every situation: when
> I'm coding and when I'm playing tetrinet. It's quite annoying, mostly
> because it fills my screen of garbage (I'll have to buy a new CTRL and
> L keys). What's the prolem? It only happens (I think) with >2.2.17
> kernels (including 2.4.0-test12).
> Please let me know if you need more information.
> 
> Un saludo.

Just wanted to confirm the above mentioned problem.

2 days ago i upgraded to 2.4.0-prelease, today suddenly i had the same
symptom. I've been running 2.4.0-test10 since it's been released and never
saw this happen there.

See the log files :

Jan  2 21:15:44 obelix rpc.mountd: authenticated unmount request from
 192.168.1.2:758 for /home/sfr/Mail (/home/sfr/Mail)
Jan  2 21:20:24 asterix kernel: keyboard: unrecognized scancode (70) - ignored
Jan  2 21:20:24 asterix last message repeated 2 times
Jan  2 21:20:24 asterix kernel: keyboard: Timeout - AT keyboard not present?
Jan  2 21:20:24 asterix kernel: keyboard: unrecognized scancode (70) - ignored
Jan  2 21:20:32 asterix last message repeated 18 times
Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 12
Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 71
Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 70
Jan  2 21:20:33 asterix kernel: keyboard: unrecognized scancode (71) - ignored
Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 70
Jan  2 21:20:34 asterix kernel: keyboard: unrecognized scancode (70) - ignored
Jan  2 21:20:47 asterix last message repeated 13 times
Jan  2 21:20:48 asterix kernel: keyboard: unknown scancode e0 14
Jan  2 21:20:48 asterix kernel: keyboard: unknown scancode e0 70
Jan  2 21:20:48 asterix kernel: keyboard: unrecognized scancode (70) - ignored
Jan  2 21:20:48 asterix kernel: keyboard: unrecognized scancode (70) - ignored
Jan  2 21:20:49 asterix kernel: keyboard: unknown scancode e0 75
Jan  2 21:20:49 asterix kernel: keyboard: unknown scancode e0 70

root@asterix:/usr/src/linux/scripts# ./ver_linux
-- Versions installed: (if some fields are empty or look
-- unusual then possibly you have very old versions)
Linux asterix 2.4.0-prerelease #4 Mon Jan 1 21:24:04 CET 2001 i686 unknown
Kernel modules         2.3.21
Gnu C                  2.95.2
Gnu Make               3.79.1
Binutils               2.10.1.0.2
Linux C Library        > libc.2.2
Dynamic linker         ldd (GNU libc) 2.2
Procps                 2.0.6
Mount                  2.10q
Net-tools              2.05
Console-tools          0.2.3
Sh-utils               2.0i
Modules Loaded         rtc w83781d sensors i2c-isa i2c-viapro i2c-core

Have a nice day, and, happy new year !

	Stefan


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Re: Timeout: AT keyboard not present?

[Tim Waugh]

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On Tue, Jan 02, 2001 at 11:22:55PM +0100, Stefan Frank wrote:

> 2 days ago i upgraded to 2.4.0-prelease, today suddenly i had the same
> symptom. I've been running 2.4.0-test10 since it's been released and never
> saw this happen there.

I get this on 2.2.18 too, and it never used to happen with 2.2
kernels.  I'd assumed it was a cabling problem, but I haven't really
looked into it.

Tim.
*/

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Re: Timeout: AT keyboard not present?

[Andries.Brouwer]

	Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 12
	Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 71
	Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 70
	Jan  2 21:20:33 asterix kernel: keyboard: unrecognized scancode (71) - ignored
	Jan  2 21:20:33 asterix kernel: keyboard: unknown scancode e0 70
	Jan  2 21:20:34 asterix kernel: keyboard: unrecognized scancode (70) - ignored
	Jan  2 21:20:47 asterix last message repeated 13 times

This sounds very much as if you got your keyboard into scancode mode 1.

(Ordinarily a key-up event gets scancode of key-down but with
high-order bit set. In scancode set 1, a key-up event get the
scancode of key-down prefixed by 0xf0. Since the high-order bit
is masked here, this 0xf0 would show up as 0x70.
Moreover, the key-up for a sequence like e0 71 is e0 f0 71,
again what you see here.)

How you got into scancode mode 1 I don't know
(maybe by sending the command f0 01 to the keyboard).
Do things improve if you rip this strange messy AUX_RECONNECT
stuff out of drivers/char/pc_keyb.c?

Andries
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Re: Timeout: AT keyboard not present?

[Jan-Benedict Glaw]

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On Wed, Jan 03, 2001 at 03:32:38PM +0100, Andries.Brouwer@cwi.nl wrote:
> How you got into scancode mode 1 I don't know
> (maybe by sending the command f0 01 to the keyboard).

Kind of f00f bug?

SCNR, JBG

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Re: Timeout: AT keyboard not present?

[Alan Cox]

> How you got into scancode mode 1 I don't know
> (maybe by sending the command f0 01 to the keyboard).
> Do things improve if you rip this strange messy AUX_RECONNECT
> stuff out of drivers/char/pc_keyb.c?

2.2.18 the aux reconnect handling is off by default
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Re: Timeout: AT keyboard not present?

[Maciej W. Rozycki]

On Wed, 3 Jan 2001 Andries.Brouwer@cwi.nl wrote:

> (Ordinarily a key-up event gets scancode of key-down but with
> high-order bit set. In scancode set 1, a key-up event get the
> scancode of key-down prefixed by 0xf0. Since the high-order bit
> is masked here, this 0xf0 would show up as 0x70.
> Moreover, the key-up for a sequence like e0 71 is e0 f0 71,
> again what you see here.)
> 
> How you got into scancode mode 1 I don't know
> (maybe by sending the command f0 01 to the keyboard).

 It looks like untranslated mode 2 (i.e. the AT keyboard's mode).  You
switch translation on or off by toggling a bit in the onboard 8042's
command byte. 

 PS/2-style keyboards start in mode 2 usually.  An XT compatibility (bit 7
meaning release) is provided by the onboard 8042 translating codes.  Some
systems (I think DEC OSF/1, for example) program keyboards to work in mode
3 (the PS/2 native mode) or possibly mode 1 (XT compatibility mode); for
these modes the 8042's translation has to disabled or the keyboard will be
next to useless.  It's also meaningful to disable the translation in mode
2 -- you are presented with the AT interface then.

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+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +

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Re: Timeout: AT keyboard not present?

[Andries.Brouwer]

>> It looks like scancode mode 1

> It looks like untranslated mode 2

Yes, that gives the same codes.

(But you are right, this point of view gives a few more possibilities
to get into this state.)

Andries

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