How do you get a composite USB Linux device with HID to wake up a suspended host?

Question

The embedded system that I'm working with runs the 3.18 Linux kernel and when connected to a PC acts as a composite USB device with HIDBP functionality (allows you to connect a keyboard and mouse to it). However, the problem I'm having is that a keyboard or mouse connected to it doesn't seem to wake up the host PC when it goes into full system suspend (a mouse connected directly to a PC can wake it up though). I'm just wondering, is this a linux kernel bug and if so how would one go about fixing it?

Answer 1

作为参考，从4.10.17版开始，主流总线内核中的USB HID复合设备尚未实现此功能