CachyOS / CachyOS/distribution

[Bug]: Firmware Bug RedmiBook Pro 16 2024 ACPI RUCC & SMBus errors

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Description

### Kernel

7.0.3-1-cachyos

### Desktop Environment / Window Manager

GNOME

### CPU

Intel Core Ultra 7 155H (Meteor Lake)

### GPU / Driver

Intel Arc Graphics / i915

### Description

On RedmiBook Pro 16 2024 laptop, boot logs show ACPI and SMBus firmware errors caused by BIOS compatibility issues. These are kernel-level firmware bugs from the manufacturer's BIOS.

### Steps to Reproduce

1. Power on the laptop and boot CachyOS
2. Check kernel boot logs (journalctl -b -p err)
3. ACPI RUCC errors and SMBus busy errors appear automatically

### Expected Behavior

No ACPI firmware errors and no SMBus busy errors during system boot.

### Actual Behavior

Boot process generates multiple ACPI errors:
- ACPI Error: Missing argument(s) for method [RUCC]
- i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!

### Logs / Error Messages

Full detailed logs (dmesg, journalctl, acpidump, dmidecode) are attached in the ZIP file. BIOS Version: RMAMT6B0P0B0B

### Additional Context

These are well-known BIOS compatibility bugs on Xiaomi/RedmiBook laptops.
The errors do not affect daily system usage but appear in kernel boot logs.

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the attached dmesg, journalctl -b -p err, acpidump, and dmidecode logs, and verify the ACPI RUCC and i801_smbus messages on kernel 7.0.3-1-cachyos. Done means determining whether a CachyOS-side change is possible or documenting that the BIOS is responsible and no repository change is available.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
operating-systems
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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