https://bugzilla.kernel.org/show_bug.cgi?id=219346 Bug ID: 219346 Summary: [BISECTED] Disable ACPI PM Timer breaks suspend on all Amber Lake machines Product: Drivers Version: 2.5 Hardware: All OS: Linux Status: NEW Severity: high Priority: P3 Component: Platform_x86 Assignee: drivers_platform_x86@xxxxxxxxxxxxxxxxxxxx Reporter: todd.e.brandt@xxxxxxxxx CC: jwrdegoede@xxxxxxxxxxxxxxxxx Blocks: 178231 Regression: Yes Bisected e86c8186d03a6ba018e881ed45f0962ad553e861 commit-id: We have two amber lake machines in our lab that have started hanging on freeze in 6.12-rc1. I've bisected to this commit: commit e86c8186d03a6ba018e881ed45f0962ad553e861 (refs/bisect/bad) Author: Marek Maslanka <mmaslanka@xxxxxxxxxx> Date: Mon Aug 12 18:42:00 2024 +0000 platform/x86:intel/pmc: Enable the ACPI PM Timer to be turned off when suspended Allow to disable ACPI PM Timer on suspend and enable on resume. A disabled timer helps optimise power consumption when the system is suspended. On resume the timer is only reactivated if it was activated prior to suspend, so unless the ACPI PM timer is enabled in the BIOS, this won't change anything. The ACPI PM timer is used by Intel's iTCO/wdat_wdt watchdog to drive the watchdog, so it doesn't need to run during suspend. Signed-off-by: Marek Maslanka <mmaslanka@xxxxxxxxxx> Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx> Link: https://lore.kernel.org/r/20240812184208.1080710-1-mmaslanka@xxxxxxxxxx Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> I understand there may already be a potential fix in the pipeline but I'd like to track this issue here. Referenced Bugs: https://bugzilla.kernel.org/show_bug.cgi?id=178231 [Bug 178231] Meta-bug: Linux suspend-to-mem and freeze performance optimization -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
