[Bug 222102] New: [ASUS Vivobook F1054ZA] Keyboard backlight missing/not working on Fedora 44 KDE - PixArt ASUP1200:00 controller

[Bug 222102] New: [ASUS Vivobook F1054ZA] Keyboard backlight missing/not working on Fedora 44 KDE - PixArt ASUP1200:00 controller

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222102

            Bug ID: 222102
           Summary: [ASUS Vivobook F1054ZA] Keyboard backlight missing/not
                    working on Fedora 44 KDE - PixArt ASUP1200:00
                    controller
           Product: Drivers
           Version: 2.5
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Platform_x86
          Assignee: drivers_platform_x86@kernel-bugs.osdl.org
          Reporter: roberto_comandatore_93@protonmail.com
        Regression: No

Created attachment 311016
  --> https://bugzilla.kernel.org/attachment.cgi?id=311016&action=edit
Contains all logs file

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[Bug 222102] [ASUS Vivobook F1054ZA] Keyboard backlight missing/not working on Fedora 44 KDE - PixArt ASUP1200:00 controller

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222102

--- Comment #1 from Roberto Comandatore (roberto_comandatore_93@protonmail.com) ---
Distribution: Fedora Linux 44 (KDE Plasma)
Kernel version: 7.2.8-200.fc44.x86_64

Description of Problem:
The keyboard backlight on the ASUS Vivobook F1054ZA does not turn on. The sysfs
interface `asus::kbd_backlight` is completely missing from `/sys/class/leds/`.

The keyboard and touchpad are driven by a PixArt I2C-HID controller recognized
as `ASUP1200:00` (HID ID 093A:200A). The kernel correctly registers the
keyboard functions via i2c-hid, but does not expose any LampArray or LED
brightness interfaces.

Attempts made:
- Upgraded laptop BIOS to the latest version.
- Tested OpenRGB and VRGB (devices not found because hidraw/sysfs endpoints are
missing).
- Loaded i2c-dev and verified Intel SMBus i801 adapter is fully active.
- Attempted to pass `acpi_osi="Windows 2020"` and `i2c_hid.polling_mode=0` in
GRUB parameters, but the HID interface for LEDs remains hidden.

I am attaching the acpidump, fastfetch summary, dmesg logs, and dmidecode
details in a compressed archive.

Cross-reference: Tracking this issue on ASUS-Linux GitLab at https://gitlab.com

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[Bug 222102] [ASUS Vivobook F1054ZA] Keyboard backlight missing/not working on Fedora 44 KDE - PixArt ASUP1200:00 controller

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222102

--- Comment #2 from Roberto Comandatore (roberto_comandatore_93@protonmail.com) ---
(In reply to Roberto Comandatore from comment #1)
> Distribution: Fedora Linux 44 (KDE Plasma)
> Kernel version: 7.2.8-200.fc44.x86_64
> 
> Description of Problem:
> The keyboard backlight on the ASUS Vivobook F1054ZA does not turn on. The
> sysfs interface `asus::kbd_backlight` is completely missing from
> `/sys/class/leds/`.
> 
> The keyboard and touchpad are driven by a PixArt I2C-HID controller
> recognized as `ASUP1200:00` (HID ID 093A:200A). The kernel correctly
> registers the keyboard functions via i2c-hid, but does not expose any
> LampArray or LED brightness interfaces.
> 
> Attempts made:
> - Upgraded laptop BIOS to the latest version.
> - Tested OpenRGB and VRGB (devices not found because hidraw/sysfs endpoints
> are missing).
> - Loaded i2c-dev and verified Intel SMBus i801 adapter is fully active.
> - Attempted to pass `acpi_osi="Windows 2020"` and `i2c_hid.polling_mode=0`
> in GRUB parameters, but the HID interface for LEDs remains hidden.
> 
> I am attaching the acpidump, fastfetch summary, dmesg logs, and dmidecode
> details in a compressed archive.
> 
> Cross-reference: Tracking this issue on ASUS-Linux GitLab at
> https://gitlab.com 

Errata corrige for Asus-Linux Gitlab link:
https://gitlab.com/asus-linux/linux-g14/-/work_items/18

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[Bug 222102] [ASUS Vivobook F1054ZA] Keyboard backlight missing/not working on Fedora 44 KDE - PixArt ASUP1200:00 controller

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222102

Roberto Comandatore (roberto_comandatore_93@protonmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|                            |7.2.8-200.fc44.x86_64

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