Re: 14.0-CURRENT boots fine but keyboard does not work

From: Michael Gmelin <grembo_at_freebsd.org>
Date: Mon, 04 Sep 2023 17:29:41 UTC

> On 4. Sep 2023, at 19:23, Matthias Apitz <guru@unixarea.de> wrote:
> 
> 
> Added Alexander Motin <mav@FreeBSD.org> to To: as the origin of the CI;
> 
> Neither hw.atkbd.hz=1 nor hw.atkbd.hz=10 makes the keyboard working on
> my beloved Acer C720. Should I file a new PR?
> 

Filing a PR makes sense, could you please Cc me on it?

Do you know which version of FreeBSD was the last that worked for you?

Cheers


> 
> 
>> El día lunes, septiembre 04, 2023 a las 06:55:52p. m. +0200, Michael Gmelin escribió:
>> 
>> 
>> 
>> On Mon, 4 Sep 2023 18:43:11 +0200
>> Matthias Apitz <guru@unixarea.de> wrote:
>> 
>>> I have a 14.0-CURRENT compiled from sources of head from August 4,
>>> which boots fine from a produced USB key, but the keyboard does not
>>> work on an Acer C720 (amd64), on other laptops the keyboard is fine.
>>> 
>>> The keyboard works during the boot menu (for example to enable verbose
>>> boot messages) but not on the login: prompt of the booted system.
>>> 
>>> I've enabled SSH access into the C720 (if someone need more
>>> information) and I'm attaching /var/log/messages of the booted system.
>> 
>> Hi Matthias,
>> 
>> The C720 required special patches for the keyboard to work, which I
>> originally added here:
>> https://cgit.freebsd.org/src/commit/?id=6c176113bbdd598231ec47d161d4c3714997169b
>> 
>> I assume that something in that area changed recently.
>> 
>> Without digging into it, this looks like a possible cause:
>> 
>>  https://cgit.freebsd.org/src/commit/sys/dev/atkbdc/atkbd.c?id=ce881170088c4c98c036fe561f8ee8413c2e2585
>> 
>>  atkbd: Disable periodic polling by default.
>>  It is one of the few remaining Giant-locked callouts.  It would be
>>  good to remove it, not mentioning that polling itself is not good.
>> 
>>  If this cause keyboard/mouse freezes on some hardware, please set
>>  loader tunable hw.atkbd.hz=1 as workaround and report the issue.
>> 
>> So you could try to set hw.atkbd.hz=1 (or hw.atkbd.hz=10) in
>> /boot/loader.conf, then reboot and see if it helps.
>> 
>> Best
>> Michael
>> 
>> -- 
>> Michael Gmelin
>> 
> 
> -- 
> Matthias Apitz, ✉ guru@unixarea.de, http://www.unixarea.de/ +49-176-38902045
> Public GnuPG key: http://www.unixarea.de/key.pub