On Wed, Jan 21, 2015 at 12:47 AM, Oliver Neukum <oneukum@xxxxxxx> wrote: > On Tue, 2015-01-20 at 23:25 +0400, Kirill Elagin wrote: > >> Hm, I'm pretty sure I never touched anything with `port` in its name, >> all the ports are set to `auto` (that's what laptop-mode-tools does). > > Here we go. > >> Right now I think I see three possibly unrelated issues: >> >> Issue #1. BT trackpad not working properly when connected to the >> builtin bluetooth adapter. >> ---------- >> >> The adapter is attached to a USB1.1 hub: >> >> ~~~~ >> # lsusb -t >> ... >> /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M >> |__ Port 2: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M >> |__ Port 2: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M >> |__ Port 2: Dev 2, If 2, Class=Vendor Specific Class, Driver=, 12M >> |__ Port 2: Dev 2, If 3, Class=Application Specific Interface, Driver=, 12M >> ... >> >> # cat usb3/power/control >> auto >> >> # cat usb3/3-*/usb3-port*/power/control >> auto >> auto > > Try setting this to on. > >> # cat usb3/3-2/power/control >> on > > Here "auto" should work. Please try. > [..] >> Issue #2. No hotplug with USB1.1: >> ---------- >> >> To see this I pick one physical port. When I plug a USB1.1 device it >> appears on bus 4 port 2; a USB2.0 device appears on bus 1 port 4. >> >> ~~~~ >> # cat usb4/power/control >> auto >> # cat usb4/4-*/usb4-port*/power/control >> auto >> auto > > Please set this to "on" > >> # cat usb1/power/control >> auto >> # cat usb1/1-*/usb1-port*/power/control > > Please set this to "on" I started with the defaults (`auto` everywhere) and did: ~~~~ for f in /sys/bus/usb/devices/usb*/*-*/*-port*/power/control; do echo on > $f; done ~~~~ This had absolutely _no_ effect on hotplug. As before, when I insert the keyboard receiver nothing happens until I echo `on` to `usb6/power/control`. > > [..] >> >> Issue #3. No hot-plug-out for USB1.1. >> -------- > >> I think that the first two issues are fixed by keeping all the USB1.1 >> hubs and the builtin BT always `on`, but I just wanted to know whether >> those are hardware or software bugs. > > I suspect this is caused by outdated laptop-mode-tools. I have laptop-mode-tools-1.66 and actually I initially blamed the new runtime-pm module. But it turns out, `laptop_mode` doesn't touch the ports at all. > > Basically setting the port controls (as opposed to hub and device > controls) to "auto" tells the kernel that it may disable hotplugging > to save energy. Hotunplug for devices that need remote wakeup will > still work. Likewise if you disable autosuspend of the attached devices. > > Regards > Oliver > > -- 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
