Mailing List Archive: Asus laptop & brightness keys

Asus laptop & brightness keys

May 15, 2021, 3:46 AM

Post #1 of 3 (207 views)

Hi!

I got a new Asus Zenbook laptop, with a ryzen 4500U processor. Most
things run great, except those brightness keys!

Nothing is reported when pressing them, either with showkeys or
acpi_listen, so I can't bind them to a shortcut. Brightness by changing
the value in /sys/class/backlight/amdgpu_b10/brightness works fine.

I have asus_wmi and asus_nb_wmi modules loaded, so things like
multitouch pad and keyboard backlight work fine.

I'm running a 5.10.27 gentoo sources kernel. Most people on the net say
that using the 'acpi_osi= ' parameter fixes it, but in my case it just
hangs at kernel boot. Did try e.g. acpi_osi=Linux, but nothing changed.

At the same time, using a live Manjaro usb both brightness keys work
fine, and they are usable under Gnome.

I'm sure I'm missing something in my kernel configuration.... Any ideas?

Thanks!

Re: Asus laptop & brightness keys [ In reply to ]

confabulate at kintzios

May 15, 2021, 4:12 AM

Post #2 of 3 (207 views)

Permalink

On Saturday, 15 May 2021 11:46:46 BST Emmanuel Vasilakis wrote:
> Hi!
>
> I got a new Asus Zenbook laptop, with a ryzen 4500U processor. Most
> things run great, except those brightness keys!
>
> Nothing is reported when pressing them, either with showkeys or
> acpi_listen, so I can't bind them to a shortcut. Brightness by changing
> the value in /sys/class/backlight/amdgpu_b10/brightness works fine.
>
> I have asus_wmi and asus_nb_wmi modules loaded, so things like
> multitouch pad and keyboard backlight work fine.
>
> I'm running a 5.10.27 gentoo sources kernel. Most people on the net say
> that using the 'acpi_osi= ' parameter fixes it, but in my case it just
> hangs at kernel boot. Did try e.g. acpi_osi=Linux, but nothing changed.
>
> At the same time, using a live Manjaro usb both brightness keys work
> fine, and they are usable under Gnome.
>
> I'm sure I'm missing something in my kernel configuration.... Any ideas?
>
> Thanks!

Assuming the Manjaro Live-USB is running the same version of kernel/modules
and firmware, then it is worth checking /proc/config.gz for the running
kernel's configuration and comparing it with your gentoo configuration.

Also while you're there you could check with lsmod what modules were loaded by
the Manjaro kernel to see if you're missing something.

Re: Asus laptop & brightness keys [ In reply to ]

mrzammler at mm

May 15, 2021, 8:38 AM

Post #3 of 3 (207 views)

Permalink

On 15/05/2021 14:12, Michael wrote:
> On Saturday, 15 May 2021 11:46:46 BST Emmanuel Vasilakis wrote:
>> Hi!
>>
>> I got a new Asus Zenbook laptop, with a ryzen 4500U processor. Most
>> things run great, except those brightness keys!
>>
>> Nothing is reported when pressing them, either with showkeys or
>> acpi_listen, so I can't bind them to a shortcut. Brightness by changing
>> the value in /sys/class/backlight/amdgpu_b10/brightness works fine.
>>
>> I have asus_wmi and asus_nb_wmi modules loaded, so things like
>> multitouch pad and keyboard backlight work fine.
>>
>> I'm running a 5.10.27 gentoo sources kernel. Most people on the net say
>> that using the 'acpi_osi= ' parameter fixes it, but in my case it just
>> hangs at kernel boot. Did try e.g. acpi_osi=Linux, but nothing changed.
>>
>> At the same time, using a live Manjaro usb both brightness keys work
>> fine, and they are usable under Gnome.
>>
>> I'm sure I'm missing something in my kernel configuration.... Any ideas?
>>
>> Thanks!
>
> Assuming the Manjaro Live-USB is running the same version of kernel/modules
> and firmware, then it is worth checking /proc/config.gz for the running
> kernel's configuration and comparing it with your gentoo configuration.
>
> Also while you're there you could check with lsmod what modules were loaded by
> the Manjaro kernel to see if you're missing something.
>

Ah, I had gone through that! Looked at almost line by line the two
dmesg, lsmod, configs etc. Of course Manjaro's config is .... big!

Turns out there was something in ACPI page of kernel config that did the
trick (not sure what exactly to be honest - might be Video).

Thanks though!

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