Re: [Powertop] RH Bugzilla [Bug 1482649] Logitech USB Unified Receiver+M570 need 'waking' up by click after kernel update

[Joe Konno <joe.konno at linux.intel.com>]

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On Thu, 7 Sep 2017 18:09:59 +0000
Mike Simms <micsim2007(a)outlook.com> wrote:

> Then explain why it was never an issue before kernel 4.12 please

That's a question for the maintainer of the kernel USB HID driver driver
community. The Linux kernel is a very large piece of software with many, many
device drivers supporting still more devices. These drivers can and do change,
for myriad reasons, from kernel release to kernel release.

Particular device power management behaviors are implemented by kernel device
drivers. PowerTOP gives you the ability to toggle (or tune) low-level,
power-sensitive settings for each device. If by toggling a setting for a
particular device that device behaves in an undesirable way, you may have a
kernel device driver bug.

USB HID-- human interface device-- drivers, which include mice and the like,
have an upstream kernel maintainer. In this specific case, the linux-usb
mailing list would be a good starting point, or the kernel.org bugzilla.

In the general case, consulting the kernel MAINTAINERS file for the device in
question should provide a mailing list starting point when issues like these
arise.

Here I can only offer general advice, nothing specific. Hope it helps!

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