Re: HP Zbook studio G5 Brightness and mic mute keys give same scancode

[TheStroyer <TheStroyer@cock.li>]

Hi,

Somewhere between 28-11-2020 and today my brightness hotkeys are broken 
again. They act as mic mute key again. I don't know if this is caused by 
the system upgrade or something else. I have used windows for the first 
time in a while, so that may have sneakily upgraded something.

I have tried downgrading the packages linux, linux-headers, 
linux-firmware, systemd and systemd-libs (form Arch Linux) to some older 
version.

I also tried updating the bios from the bios screen and updating the 
firmware from windows device manager. This all didn't change anything.

So we're back where we started I guess.

Best regards,

Friso

On 24/11/2020 12:14, Hans de Goede wrote:
> Hi,
>
> On 11/12/20 7:25 PM, Friso Smit wrote:
>> Hi,
>>
>> I'm not sure if you have read the previous mails in this thread, but the
>> problem is solved, at least for me, with a bios update.
> At that is good to know.
>
>> I don't know how
>> it works exactly, but all keys produce different scan codes now. Are there
>> still some models where this is a problem?
> Yes this is till a problem on at least the hp-pavilion-cx-0598na, see
> the mail thread starting here:
>
> https://lore.kernel.org/platform-driver-x86/CAGTBY+sgwYrDPtQgJV=TcXJ73n8TGf9Nw=arCfWMUrVFzAsEVQ@mail.gmail.com/
>
> I've just asked the reported of that problem to check if there is a BIOS
> update for his system.
>
> Regards,
>
> Hans
>
>
>
>
>> On 11/9/20 2:44 PM, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 11/5/20 5:47 PM, Andy Shevchenko wrote:
>>>> +Cc: subsystem maintainers
>>>>
>>>> On Sun, May 17, 2020 at 2:24 PM <thestroyer@cock.li> wrote:
>>>>> Hi,
>>>>> On my HP Zbook studio G5 a few keys on my keyboard give the same
>>>>> scancodes. Most notably, the brightness and mute function keys all give
>>>>> the scan code sequence 0xe0 0x20 0xe0 0xa0 as reported by showkey
>>>>> --scancodes. It only produces a scancode when pressed, not when
>>>>> released. I found another very similar issue in this mailing list found
>>>>> in https://www.spinics.net/lists/platform-driver-x86/msg16791.html. The
>>>>> issue in that mail was solved by a bios update. I'm running the latest
>>>>> bios, but I still have the issue.
>>>>> I tried the kernels: Manjaro 5.7rc4-1, Manjaro 5.6.11-1 and Manjaro
>>>>> 5.4.39-1
>>>>> I also tried a few other distributions, but they all have the same
>>>>> issue.
>>>>> I'm happy to provide more information about this issue if needed.
>>> So this already came in another thread for another HP laptop model,
>>> this seems to be a common issue on some (newer?) HP laptop models.
>>>
>>> It seems that we need to make some special WMI calls for this, either
>>> to figure out which key is actually pressed when receiving the
>>> PS/2 scancode which is shared between multiple keys. Or to get the
>>> device to send different scancodes.
>>>
>>> This will require someone with some knowledge of ACPI/WMI as well
>>> as of writing kernel code to get physical access to an affected HP
>>> laptop to figure out what is going on and write some code to deal with
>>> this special setup.
>>>
>>> Regards,
>>>
>>> Hans
>>>