Public bug reported:

ACPI BIOS Errors and i915 Warnings on Ubuntu 24.04.2 LTS (Kernel 6.11.0-26) — 
ASUS VivoBook X513EA, BIOS Updated
Bug Description:

On Ubuntu 24.04.2 LTS using kernel 6.11.0-26-generic, I consistently receive 
ACPI BIOS errors and i915 driver warnings during boot. These are visible in 
both journalctl and dmesg logs. I have confirmed that the BIOS is fully updated 
to the latest version from ASUS, but the issue persists.
System Information:

    OS: Ubuntu 24.04.2 LTS

    Kernel: 6.11.0-26-generic

    Previous Kernel: 6.11.0-25-generic

    System Manufacturer: ASUSTeK COMPUTER INC.

    Model: VivoBook X513EA (ASUSLaptop X513EA_K513EA)

    System Version: 1.0

    BIOS Version: X513EA.318

    BIOS Date: 03/28/2024

    CPU: Intel 11th Gen Core (Tiger Lake)

    GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics]

    Graphics Driver: i915 (built into the kernel)

Observed Behavior (from journalctl & dmesg):

ACPI BIOS Error (bug): Could not resolve symbol [\CTDP], AE_NOT_FOUND 
(20240322/psargs-332)
ACPI Error: Aborting method \_SB.IETM.IDSP due to previous error (AE_NOT_FOUND)
ACPI BIOS Error (bug): Could not resolve symbol 
[\_SB.PC00.LPCB.EC0.SEN1._CRT.S1CT], AE_NOT_FOUND
...
i915 0000:00:02.0: [drm] *ERROR* Port F/TC#3: timeout waiting for PHY ready

WARNING: CPU: 4 PID: 641 at drivers/gpu/drm/i915/display/intel_tc.c:740
tgl_tc_phy_init+0x117/0x140 [i915]

(Many similar ACPI errors related to _CRT, _HOT, _PSV, _AC0, and recurring i915 
TC port PHY timeouts.)
Expected Behavior:

System should boot without ACPI or i915-related warnings/errors, especially 
with up-to-date firmware.
Steps to Reproduce:

    Boot Ubuntu 24.04.2 LTS using kernel 6.11.0-26.

    Run journalctl -b or dmesg.

    Observe the listed ACPI and i915 error messages.

Additional Notes:

    BIOS version is latest available from ASUS as of March 28, 2024.

    The ACPI issues seem to be due to missing or unresolved DSDT/ACPI
symbols, which may affect power and thermal management.

    The i915 warnings appear to relate to USB-C / Thunderbolt (Type-C)
PHY timeout or initialization failures.

lsb_release -rd
No LSB modules are available.
Description:    Ubuntu 24.04.2 LTS
Release:        24.04

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.11.0-26-generic 6.11.0-26.26~24.04.1
ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11
Uname: Linux 6.11.0-26-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  alfarez    2329 F.... wireplumber
 /dev/snd/seq:        alfarez    2325 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun  2 22:21:56 2025
InstallationDate: Installed on 2025-05-16 (17 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 13d3:56a8 IMC Networks USB2.0 HD UVC WebCam
 Bus 001 Device 003: ID 8087:0026 Intel Corp. AX201 Bluetooth
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X513EA_K513EA
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-26-generic 
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-6.11.0-26-generic N/A
 linux-backports-modules-6.11.0-26-generic  N/A
 linux-firmware                             20240318.git3b128b60-0ubuntu2.12
SourcePackage: linux-hwe-6.11
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/28/2024
dmi.bios.release: 5.19
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: X513EA.318
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X513EA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrX513EA.318:bd03/28/2024:br5.19:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX513EA_K513EA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX513EA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:
dmi.product.family: VivoBook
dmi.product.name: VivoBook_ASUSLaptop X513EA_K513EA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

** Affects: linux-hwe-6.11 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble wayland-session

** Summary changed:

- i915 bug when flickering the screen. dmesg PHY Timeout
+ Asus GPU i915 hang issues

** Summary changed:

- Asus GPU i915 hang issues
+ Asus Vivobook X531EA, GPU i915 hang issues

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https://bugs.launchpad.net/bugs/2112326

Title:
  Asus Vivobook X531EA, GPU i915 hang issues

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