Re: autosuspend for HID devices, take #4
Oliver Neukum <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
Am Montag, 25. Juni 2007 schrieb Jiri Kosina: > On Fri, 22 Jun 2007, Oliver Neukum wrote: > > > could you please run two tests? > > 1. set the autosuspend timeout to 0 (this'll kill usb mice) > > And it kills also my testing keyboard on the UHCI system. After the > keyboard gets suspended and I hit a key, it wakes up (the LEDs come up), > but no keypressess are produced and the keyboard gets suspended again. I had a hunch that UHCI handles remote wakeup incorrectly while the hub above the device is still active. This seems to kill that theory. > > 2. use a 1.1 hub > > I grabbed a random HUB (usbhub4c from Linksys) and this made it work > nicely even on UHCI-based system I am testing on. > > I will do some more debugging to check what exactly goes wrong, but I am > leaving for OLS tomorrow. Is it a 1.1 hub or a 2.0 hub? If the latter you just switch the device to ehci. Did you unload ehci_hcd for the test? > BTW I don't know if you recall - I reported previously that the keypresses > are lost only if I try to hit the key very soon after the keyboard gets > suspended. If I wait for 2 seconds (looks like exact value), then no > keypressess are lost and the keyboard wakes up properly. Alan, is there something in UHCI that uses that 2 second value? Regards Oliver ------------------------------------------------------------------------- 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/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel