On Wed, 21 May 2014, Heinz Diehl wrote:
> On 21.05.2014, Alan Stern wrote:
>
> > Your problems were probably caused by those spontaneous disconnects.
>
> Yes, I got the same impression while encountering this.
>
> > They could be caused by a small electrical incompatibility between the
> > computer and the device.
>
> In this case, most probably all of those interfaces have this
> electrical flaw. I own two of it, and both are showing the same faulty
> behaviour on three different machines (Gigabyte AMD, Asus U45JC
> and HP Elitebook). Maybe this interface should be blacklisted, then?
>
> However, they both work flawlessly on Windows 7-64..
Maybe the problem involves USB-3 Link Power Management. Unfortunately
there isn't any way I know of to disable it without rebuilding the
kernel.
The patch below will disable LPM for all devices. You can try it and
see if it helps.
Alan Stern
Index: usb-3.15/drivers/usb/core/hub.c
===================================================================
--- usb-3.15.orig/drivers/usb/core/hub.c
+++ usb-3.15/drivers/usb/core/hub.c
@@ -130,6 +130,8 @@ struct usb_hub *usb_hub_to_struct_hub(st
static int usb_device_supports_lpm(struct usb_device *udev)
{
+ return 0;
+
/* USB 2.1 (and greater) devices indicate LPM support through
* their USB 2.0 Extended Capabilities BOS descriptor.
*/
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