Hi HO, would it be possible for you or someone else with affected hardware to test this kernel? Here's the link: https://people.canonical.com/~cremfuelled/LP2118955/.
If this works I can send a patch that would fix the issue for Ubuntu kernels, which would allow you to uninstall the unsupported mainline kernel if you so desire. You can install the test kernel with: $ sudo dpkg -i linux-image-unsigned-6.14.0-* linux-modules-6.14.0-* And then, after a reboot and testing, you can remove it from your system with: $ sudo dpkg -P linux-image-unsigned-6.14.0-* linux-modules-6.14.0-* Thanks! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-6.14 in Ubuntu. https://bugs.launchpad.net/bugs/2118955 Title: [s2idle] Suspend fails on Acer Nitro ANV15-41 when keyboard controller is active Status in linux-hwe-6.14 package in Ubuntu: Triaged Status in linux-hwe-6.14 source package in Noble: Triaged Status in linux-hwe-6.14 source package in Plucky: Triaged Bug description: Confirmed through multiple different experiments, the laptop fails to suspend to s2idle due to an issue directly tied to the activity state of the keyboard's low-level hardware controller. The failure is 100% reproducible. If a suspend is initiated within approximately **20-30 seconds of the last keyboard key press**, the suspend fails. The system attempts to enter suspend for a few seconds and then immediately wakes up. The key indicator of failure in the kernel log is the message `kernel: amd_pmc ... Last suspend didn't reach deepest state`, indicating the hardware failed to enter its sleep state. This behavior strongly suggests that the keyboard's controller (likely the Embedded Controller or EC) has an internal activity timer. If the OS requests a system-wide suspend while this timer is still active, the controller's firmware fails to handle the suspend signal correctly, causing the entire process to abort. The keyboard backlight serves as a useful visual indicator of this controller's active state: - If the backlight is configured in BIOS settings to "Never" time out, the controller remains permanently active, and **suspend fails 100% of the time.** - If the backlight is allowed to time out, suspend will succeed reliably **only after** the timeout period has passed. Critically, even disabling the backlight entirely using the shortcut ALT+F11 does not fix the issue. I believe this is because the bug lies with the EC's core activity timer which happens to have the same timeout as the keyboard's backlight. EDIT: I forgot to mention, this issue occurs despite me upgrading to the latest bios version provided by the manufacturer (v1.18). ### Steps to Reproduce 1. Press any key on the keyboard to trigger the controller's active state. 2. Immediately (within ~10 seconds) run sudo systemctl suspend. 3. **Observe Failure:** The system will wake up immediately. 4. After waking, wait for 30 seconds without pressing the keyboard, allowing the controller to return to an idle state. 5. Run sudo systemctl suspend again. 6. **Observe Success:** The system will now suspend correctly. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.14.0-24-generic 6.14.0-24.24~24.04.3 ProcVersionSignature: Ubuntu 6.14.0-24.24~24.04.3-generic 6.14.6 Uname: Linux 6.14.0-24-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: edllt 2496 F.... wireplumber /dev/snd/controlC0: edllt 2496 F.... wireplumber /dev/snd/controlC1: edllt 2496 F.... wireplumber /dev/snd/seq: edllt 2492 F.... pipewire CRDA: N/A CasperMD5CheckResult: fail CurrentDesktop: ubuntu:GNOME Date: Tue Jul 29 03:29:57 2025 InstallationDate: Installed on 2025-07-20 (8 days ago) InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215) MachineType: Acer Nitro ANV15-41 ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-24-generic root=UUID=006e355c-90b4-4948-858d-60a40874317a ro nvidia-drm.modeset=1 nvidia.NVreg_PreserveVideoMemoryAllocations=1 RelatedPackageVersions: linux-restricted-modules-6.14.0-24-generic N/A linux-backports-modules-6.14.0-24-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.14 SourcePackage: linux-hwe-6.14 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/02/2025 dmi.bios.release: 1.18 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: V1.18 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Sportage_RBH dmi.board.vendor: RB dmi.board.version: V1.18 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 1.9 dmi.modalias: dmi:bvnINSYDECorp.:bvrV1.18:bd07/02/2025:br1.18:efr1.9:svnAcer:pnNitroANV15-41:pvrV1.18:rvnRB:rnSportage_RBH:rvrV1.18:cvnAcer:ct10:cvrChassisVersion:sku0000000000000000: dmi.product.family: Acer Nitro V 15 dmi.product.name: Nitro ANV15-41 dmi.product.sku: 0000000000000000 dmi.product.version: V1.18 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.14/+bug/2118955/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
