Thanks yang,
Yes armv7, but I looked into it more over easter and it seems to be an odroid issue.
The kernel in there is ancient (3.10) and does not include this patch lkml.org/lkml/2013/5/24/440
Which would explain an error message i noticed in dmesg.
Recompiled the kernel with the patch and tried it out
Next I encountered this:
webcache.googleusercontent.com/search?q=...&client=firefox-b-ab but it seems to work with the value increased to 1M

I let captures run and got about 300 now before failing with:

[  953.639533] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  953.639700] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[  960.955016] [c5] usb 4-1.1.1: reset SuperSpeed USB device number 4 using xhci-hcd

[  960.969487] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  960.969647] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[  968.260035] [c0] usb 4-1.1.1: reset SuperSpeed USB device number 4 using xhci-hcd

[  968.274477] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  968.274647] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[  975.599976] [c0] usb 4-1.1.1: reset SuperSpeed USB device number 4 using xhci-hcd

[  975.614377] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  975.614533] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[  982.905035] [c0] usb 4-1.1.1: reset SuperSpeed USB device number 4 using xhci-hcd

[  982.919409] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  982.919580] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[  990.180016] [c5] usb 4-1.1.1: reset SuperSpeed USB device number 4 using xhci-hcd

[  990.194409] [c0] usb 4-1.1.1: Parent hub missing LPM exit latency info.  Power management will be impacted.

[  990.194575] [c0] xhci-hcd xhci-hcd.2.auto: xHCI xhci_drop_endpoint called with disabled ep ddaa6140

[ 1002.378822] [c0] hub 4-1.1:1.0: hub_port_status failed (err = -110)

[ 1007.378798] [c0] hub 4-1.1:1.0: hub_port_status failed (err = -110)

[ 1007.383614] [c0] hub 4-1.1:1.0: cannot disable port 1 (err = -110)

[ 1012.388792] [c0] hub 4-1.1:1.0: hub_port_status failed (err = -110)

....