On Fri, Nov 06, 2015 at 08:52:52AM +0800, Lu, Baolu wrote: >> I reproduced the U1/U2 disconnect issues several times. I didn't try the >> issue of not enough bandwidth for two devices. > Can you please try the not enough bandwidth issue? It doesn't work. I can use one card (it takes 3-4 tries to get it started due to LPM bugs, but it works), but not two. Note that I can use one card even if the other is plugged in. I just can't use both at the same time. > Can you cat /sys/bus/usb/devices/2-2/power/usb3_hardware_lpm_u1 > and /sys/bus/usb/devices/2-2/power/usb3_hardware_lpm_u2 for several > times? Don't use that device when cat these two files. I waited a bit longer, and indeed, now it consistently shows enabled on both cards. klump:~> cat /sys/bus/usb/devices/2-1/power/usb3_hardware_lpm_u1 enabled klump:~> cat /sys/bus/usb/devices/2-1/power/usb3_hardware_lpm_u2 enabled klump:~> cat /sys/bus/usb/devices/2-2/power/usb3_hardware_lpm_u1 enabled klump:~> cat /sys/bus/usb/devices/2-2/power/usb3_hardware_lpm_u2 enabled For fun, I tried also with a USB 2.0 cable. U1 and U2 comes up as disabled, but of course, the device doesn't work. /* Steinar */ -- Homepage: http://www.sesse.net/ -- 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
