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udev: add rule to keep USB HID input devices out of runtime PM #257

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udev: add rule to keep USB HID input devices out of runtime PM #257

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ Udev rules automatically apply system configurations upon device detection or st
* **I/O Scheduler Assignment**: Dynamically assigns I/O schedulers: `bfq` for HDDs, `mq-deadline` for SATA SSDs and eMMC, and `kyber` for NVMe SSDs.
* **HDD Performance Tuning**: Applies `hdparm` settings (`-B 254 -S 0`) to rotational ATA disks.
* **NVIDIA Runtime Power Management**: Enables/disables NVIDIA GPU runtime power management on driver bind/unbind events.
* **USB HID Runtime Power Management**: Disables USB runtime PM (autosuspend) for external, removable HID input devices to reduce input latency.
* **CPU DMA Latency Access**: Sets permissions for the `cpu_dma_latency` device.
* **Wireless Regulatory Domain**: Triggers setting of the wireless regulatory domain when a Wi-Fi device is added.

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4 changes: 4 additions & 0 deletions usr/lib/udev/rules.d/75-usb-hid-pm.rules
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# Disable USB runtime PM (autosuspend) for external removable HID input devices
ACTION=="add", SUBSYSTEM=="usb", ATTR{bInterfaceClass}=="03", \
ATTRS{removable}=="removable", TEST=="../power/control", \
ATTR{../power/control}="on"