linux-kernel - Re: PROBLEM: asus_nb_wmi sends KEY_BRIGHTNESSDOWN on pressing CAPS Lock and PrntScrn on Zenbook S 13 UX5304VA

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Date:   Sun, 1 Oct 2023 08:46:13 +0000
From:   James John <me@...jajo.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        Corentin Chary <corentin.chary@...il.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>
Cc:     platform-driver-x86@...r.kernel.org,
        acpi4asus-user@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: asus_nb_wmi sends KEY_BRIGHTNESSDOWN on pressing CAPS
 Lock and PrntScrn on Zenbook S 13 UX5304VA

Hello Han,

Thank you very much for this detailed steps. I was able to reproduce 
this with "evtest" and everything went okay.

After editing /lib/udev/hwdb.d/60-keyboarrd.hwdb as you specified, the 
problem has been fixed, which I believe should revert on reboot?


This is the content of /sys/class/dmi/id/modalias

dmi:bvnAmericanMegatrendsInternational,LLC.:bvrUX5304VA.304:bd05/16/2023:br5.27:svnASUSTeKCOMPUTERINC.:pnZenbookS13UX5304VA_UX5304VA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX5304VA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:


Yes, I built my kernel. I wish I could parse this and write a proper quirk.

Also, I don't know if this is related; the hotkeys should be enabled by 
default. Fn key should be for Function keys. But in the current state, 
it is reversed.


Thank you

James

On 01/10/2023 09:28, Hans de Goede wrote:
> Hi James,
>
> On 10/1/23 10:11, James John wrote:
>> Hello,
>>
>> First of all, thank you very much for the work you do with maintaining these drivers and supporting systems. It is not an easy one.
>>
>> I have debugged this bug down to the asus_nb_wmi module. When I disable this module, the problem goes away, but then other hotkeys are not recognized. Attached is a debug event from libinput, where I pressed the capslock twice
>>
>> I have tried to dabble around with asus-nb-wmi.c codes to see if I could fix it by luck, by adding UX5304VA to `static const struct dmi_system_id asus_quirks[]` but to no avail. And I have a very little knowledge of what "quirks" are.
>>
>> I have attached some information regarding my hardware and kernel. I will be available to provide any more information that might be needed to resolve this.
>>
>> A related open thread: https://bbs.archlinux.org/viewtopic.php?pid=2123716
> First of all lets confirm that the KEY_BRIGHTNESSDOWN events are really coming from asus_nb_wmi.
>
> Please install evtest and then run "sudo evtest" and then select the "Asus WMI hotkeys" device
> by typing its number followed by enter.
>
> After this reproduce the bug and see if the log shows KEY_BRIGHTNESSDOWN.
>
> Since you said you tried playing around with the quirks, I assume you can build
> your own kernel, please let me know if that is wrong.
>
> If this confirms the KEY_BRIGHTNESSDOWN events are coming from the "Asus WMI hotkeys" device,
> then please edit /lib/udev/hwdb.d/60-keyboard.hwdb
>
> And search for "Asus WMI hotkeys", this should find this section:
>
> evdev:name:Asus WMI hotkeys:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
> evdev:name:Eee PC WMI hotkeys:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
> evdev:name:Asus Laptop extra buttons:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
>   KEYBOARD_KEY_6b=f21                                    # Touchpad Toggle
>   KEYBOARD_KEY_7c=f20                                    # Remap micmute to f20
>
> Change this to:
>
> evdev:name:Asus WMI hotkeys:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
> evdev:name:Eee PC WMI hotkeys:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
> evdev:name:Asus Laptop extra buttons:dmi:bvn*:bvr*:bd*:svnASUS*:pn*:*
>   KEYBOARD_KEY_6b=f21                                    # Touchpad Toggle
>   KEYBOARD_KEY_7c=f20                                    # Remap micmute to f20
>   KEYBOARD_KEY_20=unknown
>
> And then run "sudo udevadm hwdb --update" followed by "sudo udevadm trigger",
> that should filter out the spurious keypresses.
>
> If that helps, please run:
>
> cat /sys/class/dmi/id/modalias
>
> So that a proper DMI based quirk to only to the filtering on your model
> can be written.
>
> Regards,
>
> Hans
>