Update to driver version 10.1.2.94 or newer (released April 2021). 6.3 Missing “Battery Charge Threshold” after sleep Cause: EC reset on resume does not re-apply registry limit.
n1lagr03w.exe /extract C:\Drivers\ACPI Then install using pnputil :
| Metric | Without Lenovo ACPI driver | With Lenovo ACPI driver | |--------|----------------------------|--------------------------| | ACPI IRQ handling (µs) | 18.2 | 19.1 (+5%) | | Battery life (hours, light load) | 6.2 | 7.8 (+25%)* | | Fn key response latency | N/A (not working) | 12 ms | | DPC latency (max) | 245 µs | 263 µs |
Get-WinEvent -LogName "System" | Where-Object $_.ProviderName -eq "LenovoAcpi" Critical events to watch: Event ID 5 (EC communication timeout), Event ID 12 (Battery method not found).
pnputil /enum-drivers | findstr "acpivhd" pnputil /delete-driver oemXX.inf /uninstall # Then reinstall from Lenovo package Applies to: Early 2020 drivers on Windows 10 2004+.
Improptu D3cold transition on PCI root port.
Windows Update replaced Lenovo ACPI driver with generic Microsoft ACPI driver.
Update to driver version 10.1.2.94 or newer (released April 2021). 6.3 Missing “Battery Charge Threshold” after sleep Cause: EC reset on resume does not re-apply registry limit.
n1lagr03w.exe /extract C:\Drivers\ACPI Then install using pnputil :
| Metric | Without Lenovo ACPI driver | With Lenovo ACPI driver | |--------|----------------------------|--------------------------| | ACPI IRQ handling (µs) | 18.2 | 19.1 (+5%) | | Battery life (hours, light load) | 6.2 | 7.8 (+25%)* | | Fn key response latency | N/A (not working) | 12 ms | | DPC latency (max) | 245 µs | 263 µs |
Get-WinEvent -LogName "System" | Where-Object $_.ProviderName -eq "LenovoAcpi" Critical events to watch: Event ID 5 (EC communication timeout), Event ID 12 (Battery method not found).
pnputil /enum-drivers | findstr "acpivhd" pnputil /delete-driver oemXX.inf /uninstall # Then reinstall from Lenovo package Applies to: Early 2020 drivers on Windows 10 2004+.
Improptu D3cold transition on PCI root port.
Windows Update replaced Lenovo ACPI driver with generic Microsoft ACPI driver.
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