On Wed, 22 Jul 2015, Giulio Bernardi wrote: > Hi everybody, > > I just bought an Inateck FD2003 docking station which is based on a JMicron > "JMS56x Series" controller (152d:1567). > > This docking station can host two sata drives. It works perfectly when one drive > is inserted (in whathever slot), but if I try to use two drives together, only > the one placed in slot #1 is seen. > > I thought it was a problem of the docking station but then I tried to reboot in > Windows 7 that came with the laptop and there I could see both drives. > > I tried to power up the docking station with both drives in, with one drive and > then hotplugging the other, and vice versa, but results are the same. > Whenever I plug or unplug a drive, the kernel says the usb device was > disconnected, and later reconnected. This happens also if I unplug the drive > that is not detected: if I have both drives inserted the system sees drive #1, > if then I remove drive 2 the kernel says the device was disconnected, and after > some seconds it is detected as reconnected. > > My laptop has an usb2 controller though the device is usb3, my os is Fedora 22 > with kernel 4.0.8-300.fc22.x86_64. ... > Does someone have some hints? I tried to blacklist uas just to see if something > changed, but it did not (except that module uas was not being loaded anymore). Try capturing a usbmon trace showing what happens when you plug in the docking station with two drives installed. Instructions are in the kernel source file Documentation/usb/usbmon.txt. Alan Stern -- 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
