https://bugzilla.kernel.org/show_bug.cgi?id=221217
--- Comment #1 from [email protected] --- **Resolution: s2idle now working on Lenovo IdeaPad Slim 3 15ABR8 (82XM)** After further investigation, two separate issues were blocking s2idle on this system. Both are resolved with the fixes below. **Issue 1: ACPI namespace mismatch (SNTM)** The BIOS calls `\_SB.PC00.LPCB.EC0.SNTM` (Intel-style path) but the actual ACPI namespace uses `\_SB.PCI0.LPC0.EC0.SNTM` (AMD-style path). This causes `AE_NOT_FOUND` during suspend entry, aborting the `\_SB.PEP._DSM` method. Fix: inject a minimal SSDT that creates the missing path as a stub delegating to the real method. Compiled with iasl and injected via a cpio archive prepended to initrd: ``` mkdir -p kernel/firmware/acpi cp sntm_fix.aml kernel/firmware/acpi/ find kernel | cpio -H newc --create > /boot/acpi_override.cpio ``` With `GRUB_EARLY_INITRD_LINUX_CUSTOM="acpi_override.cpio"` in `/etc/default/grub`. **Issue 2: Unserviced GPIO interrupt from I2C touchpad and touchscreen** After resolving Issue 1, s2idle still failed immediately with IRQ 7 (pinctrl_amd) as the wakeup source. Diagnosed using `amd-debug-tools` (`amd-s2idle test`), which identified that GPIO interrupts were not being serviced. Root cause: `AMDI0010:01` (I2CB bus, carrying the ELAN06FA touchpad) has a confirmed DSDT firmware bug — bus speed declared as 400kHz but forced to 100kHz by the kernel. This prevents the touchpad GPIO interrupt from being properly serviced during suspend, causing immediate wakeup. Fix: disable wakeup for both I2C HID devices permanently via udev: `/etc/udev/rules.d/99-sleep-fix.rules`: ``` ACTION=="add", SUBSYSTEM=="i2c", KERNEL=="i2c-ELAN06FA:00", ATTR{power/wakeup}="disabled" ACTION=="add", SUBSYSTEM=="i2c", KERNEL=="i2c-GTCH7503:00", ATTR{power/wakeup}="disabled" ``` With both fixes applied, s2idle works correctly. The system enters sleep and wakes cleanly on keyboard/power button press. Verified on kernel 6.17.0-19-generic, Ubuntu 25.10, BIOS KYCN40WW v1.40. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
