Ubuntu
linux package

  1. Bug #1116525
  2. Comment #18

Comment 18 for bug 1116525

Revision history for this message
Brian Campbell (bacam) wrote :

I also get this on a machine running trusty. The BIOS ought to be fairly up to date:

root@pareto:/sys# dmidecode -s bios-version && dmidecode -s bios-release-date
G2ET99WW (2.59 )
12/04/2013

I looked into the code behind the "Not enough bandwidth on HS bus for newly activated TT" kernel message a little. It's in a software check that enough bandwidth is available for new USB devices, which is currently only performed for Intel Pantherpoint chipsets like the X230's. This failure appears to be enough to prevent the new USB device from working. Hence I suspect a problem with the kernel's xhci code, very possibily in the bandwidth check code. You can see the patch set that added the bandwidth checking code at http://thread.gmane.org/gmane.linux.usb.general/51765/focus=51993