On Tue, Jul 20, 2010 at 02:24:20PM +0200, Oliver Neukum wrote: > Am Dienstag, 20. Juli 2010, 14:14:13 schrieb x0r: > > В Втр, 20/07/2010 в 12:03 +0200, Oliver Neukum пишет: > > > Am Dienstag, 20. Juli 2010, 10:58:50 schrieb Jiri Kosina: > > > > On Tue, 20 Jul 2010, Oliver Neukum wrote: > > > > > > > > > > It looks like ACRUX game controllers do not like autopm. There is > > > > > > a bug report over at Ubuntu's launchpad: > > > > > > > > > > > > https://bugs.launchpad.net/ubuntu/+source/joystick/+bug/448446 > > > > > > > > > > That report shows that the symptoms are consistent with autosuspend, > > > > > but it doesn't show that autosuspend was on. > > > > > > > > That would be my first question -- who enabled autosuspend, if it was > > > > really on? I thought it should be still off by default, shouldn't it? > > > > > > It is off by default, but that doesn't stop Ubuntu having a udev rule to > > > switch it on or patching the kernel, so it might be on. We simply need > > > to know. > > > > > > Regards > > > Oliver > > > > > > > x0r@desktop:~$ cat /sys/bus/usb/devices/5-1/power/autosuspend > > 2 > > > > Does it mean that autosuspend is enabled? > > No, this means that if it is enabled a heuristic timeout of 2s is used. > That is if your device has been being idle for 2s, it will be autosuspend. > > Whether it is autosuspended at all all is controlled in the "level" attribute. > > on = no autosuspend > auto = autosuspend activated > Hmm, Sergei says that fiddling with autosuspend values (nor disabling it altogether by recompiling without CONFIG_USB_SUSPEND) helps. If device left unopened then attempts to open it (and thus start traffic) at a later time fail. Sergei, what happens if you have the device plugged and compile HID as a module and then unload/reload the driver and try opening the device right away? Does it work or is it still dead? Thanks. -- Dmitry -- 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
