Am 22.09.2013 22:36, schrieb Marc MERLIN: > On Sun, Sep 22, 2013 at 04:32:08PM -0400, Alan Stern wrote: >>> I'm somehow thinking there is a driver or hardware problem when the device >>> does get stuck in a mode where it won't sleep properly again until the next >>> reboot (just unloading/loading the driver does not fix this). >> >> That's quite possible. But if it is a driver problem, wouldn't >> unloading and reloading the driver fix it? > > You'd think that but it hasn't so far with this one device. > >>>> You might get more information from a kernel with CONFIG_USB_DEBUG >>>> enabled. Especially if you add >>>> >>>> #define VERBOSE_DEBUG >>>> >>>> to drivers/usb/core/driver.c before the first #include line. >>> >>> Do you think thaty would help debug the problem above, or not really? I'm >> >> There's no way to know in advance. >> >>> starting to think that the USB layer is not at fault, although I could be >>> wrong I suppose. >> >> You asked for advice on things to try, and I suggested something. >> That's the best I can do. > > Understood, just making sure this was still potentially useful considering > what I found out since my last message. Which version of powertop are you actually using? None of current versions would show you Watt usage for devices. you can use "watch grep . *" instead and check fallowing fields: runtime_suspended_time - suspend time. If it is growing device is suspended runtime_active_kids - if not zero, some program use it control - if "on" then autosuspend is disabled. -- Regards, Oleksij -- 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
