On Sat, 27 Jun 2009, Alberto Gonzalez wrote: > > Does it wakeup with a left click if you set the autosuspend file to 1 or > > 2? 2 seconds is the default for that file, and powertop really > > shouldn't try to set it to 0 seconds. > > Yes, with ../power/level to auto and ../power/autosuspend set to 2, the mouse > suspends after 2 seconds and wakes up on a click (but as Mathew Garret said in > another mail, this is uncomfortable and it should really wake up on movement). Some mice can wake up on movement and some can't. (For example, an LED-based mouse doesn't have enough power in suspend mode to illuminate the LED, so of course it can't detect movement.) The spec allows either behavior. > > > Which value does the U key in powertop touch to enable USB auto-suspend? > > > > It has to set the power/level file to auto to enable autosuspend. My > > guess is that it also sets the power/autosuspend file to 0. > > Exactly, I've verified that before using powertop the values are 2 and "on" > respectively. Pressing U in powertop changes them to 0 and "auto". 0 is certainly wrong. It means to suspend the device immediately after every I/O operation completes! Oliver, maybe you should patch usbhid to make it avoid autosuspending mice while the device file is open. That should prevent a lot of complaints. Maybe keyboards too, I don't know -- people don't seem to be having as much trouble with them. 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
