[arch-general] Brightness keys not working on laptop

[David Rosenstrauch]

On 2020-03-04 5:39 pm, David Rosenstrauch wrote:
> I'm fairly certain these hotkeys are controlled by the kernel hp_wmi
> module, and I do see some error message lines in dmesg about that:
> 
> [    5.683232] hp_wmi: query 0x4 returned error 0x5
> [    5.697112] hp_wmi: query 0x4 returned error 0x5
> [    5.704773] hp_wmi: query 0xd returned error 0x5
> [    5.730490] hp_wmi: query 0x1b returned error 0x5

Forgot to mention:  I see these WMI messages as well:

[    4.600697] acpi PNP0C14:01: duplicate WMI GUID 
05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:00)
[    4.600778] acpi PNP0C14:02: duplicate WMI GUID 
05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:00)
[    4.600838] acpi PNP0C14:03: duplicate WMI GUID 
05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:00)
[    4.600906] acpi PNP0C14:04: duplicate WMI GUID 
05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:00)

Not sure if they're relevant.

Thanks,

DR