On Wed, 23 May 2007, Alan Stern wrote: > I suspect it is keyboard-dependent. For example, the keyboard's > internal buffer might be able to hold no more than one event, because > the designers expected the host to poll frequently. Since the polling > can't occur during the wakeup interval, multiple events from that time > will get lost.
Hi Alan, in such situation, I'd however expect the first N events to be lost, but the last events to arrive without problem. What I am experiencing, however, is that the missing events are usually "the middle" ones. I have in the meantime tested with another USB keyboard on the same system, still the very same behavior with lost keypresses. I will try the same keyboards on another system now, to verify whether it could be a USB hub's fault instead. > It wouldn't be surprising to find lots of USB HID devices suffering from > this kind of problem. Which unfortunately would render suspending them quite impossible, as losing keypresses this often is a big no-no :( I will work on this a little bit more. Thanks, -- Jiri Kosina SUSE Labs ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
