USB suspend and Logitech Iilluminated Keyboard

[Roland Ramthun <mail@roland-ramthun.de>]

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Hello list,

I recently bought a Logitech Illuminated Keyboard, which has, as the name suggests, a background illumination.

After activating USB suspend (USB_SUSPEND) in the kernel, the keyboard is rendered unusable:
*) It starts to flash (suspend -> immediate wakeup, even without a key pressed -> suspend -> ...)
*) While starting up the illumination after every suspend, key presses are not recognized for fractions of a second

I wrote an udev rule to disable USB suspend for this specific model, which solves the described problems. You'll find it attached.

Is there another way to circumvent this problem?
If not, please consider to include this rule into the official udev release.

Kind regards,
Roland

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#Disable USB power suspend on Logitech Illuminated Keyboard, which leads to flashing background illumination and short episodes of non responsiveness
SUBSYSTEM=="usb", ATTR{idVendor}=="046d", ATTR{idProduct}=="c318", ATTR{power/control}="on"