On Thu, 24 May 2012, Josh Boyer wrote: > I'm testing Linus' tree as the merge window happens, and I've hit an > issue with what I believe is USB device power management (or something) > that is causing my mouse and keyboard to become unresponsive. After a > very short time of non-use, either device will cut out. I can move the > mouse around but it doesn't relay to the screen and I noticed this is > because the laser is turned off. If I click a button on it, it will > turn back on and function again until a small period of non-use. The > keyboard exhibits similar behavior, "ignoring" the first few key strokes > until it wakes back up. > > I found this thread: > > http://thread.gmane.org/gmane.linux.usb.general/64292 > and > http://marc.info/?t=133552726500001&r=1&w=2 > > which have similar symptoms, but the kernels I'm using have the > subsequent patches applied. I'm doing a git bisect at the moment, with > 72c04af as the starting good commit and 61011677 as the first bad. I'll > let you know what comes of this, but I thought I'd mail about it now in > case anyone has any ideas. It sounds like you have autosuspend enabled on the mouse and keyboard, and they don't work very well with it. Setting the sysfs power/control attributes for the two devices to "on" will prevent autosuspend. I don't know why this would have started happening after a kernel upgrade. Those settings are normally controlled by userspace apps. Let us know what you find. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
