Acer Aspire 5 (A515-56) – Lid Open Doesn’t Trigger Boot After Full Shutdown

Tanveer6279

Hi all,

I’ve been running into a strange issue on my Aspire 5 (A515-56) that seems related to how the system interprets the lid-open event. Maybe someone else has experienced this and found a fix.

Here’s what I see:

• When the laptop is in sleep mode, opening the lid wakes it normally every time.
• But when the machine is fully shut down, opening the lid does nothing. I have to press the power button to get it going. No indicator lights, no fan spin—almost as if the lid sensor isn’t triggering a boot event during cold start.

Things I’ve already checked:

• BIOS updated to the most recent build.
• Windows 11 Fast Startup disabled (both in OS and UEFI).
• Verified the “Power On Lid Open” feature is toggled on in BIOS.
• Looked through Event Viewer—no relevant entries around failed attempts.

It’s kind of puzzling because the feature works fine in sleep but fails completely in shutdown. While testing, I had a dozen Chrome tabs open—including a random one on the Dunkin Donuts Muffins Menu (don’t ask, late-night cravings)—and the system otherwise behaved normally. So it definitely feels isolated to BIOS/firmware handling of lid events at cold boot.

My questions:

1. Does anyone know if Acer limits “Wake on Lid” to only sleep/hibernate states instead of full shutdown?
2. Are there advanced BIOS options (ErP, Modern Standby, deep sleep states) that could be blocking it?
3. Has anyone found a workaround—like registry edits, custom ACPI drivers, or EC firmware tweaks—to force cold-boot on lid open?

Any insights would be really appreciated. Thanks!

Puraw

Hi Tanveer6279,

The “Power On Lid Open” option in Acer BIOS can be a bit misleading. On Aspire models like the A515‑56, the Hall effect sensor only wakes the system from suspend states (Sleep/Modern Standby or Hibernate). It does not trigger a power‑on from a full shutdown (S5).

• From sleep/hibernate: opening the lid works as expected.
• From full shutdown: lid open has no effect; the power button is required.
• This is by design across most Acer consumer laptops, not a fault with your unit.
• Disabling Fast Startup or toggling BIOS options won’t change this behavior.
• There’s no registry or EC firmware tweak to override it—it’s hardware‑bound.

So in short, “wake on lid” is limited to suspend modes, not cold boot.