Comment 35 for bug 1244176

But the Trusty kernel has the CONFIG_USB_OHCI_HCD_PCI=y set (which was the problem reported here) and I just checked the iso with the virtual keyboard/monitor over lan which was failing before. And that is reacting on the keyboard.
Michael, from the little info in your comment its unclear whether there was a kernel panic and a resulting hang or just the usb keyboard had an issue. But since things seem to work here, it is very likely a different issue to this. Could you file a new bug ("ubuntu-bug linux" from the live iso, then you can manually update the report with the details of the server install). Subscribe me to the new report, then I will see it. And add more details on how this happens (always the same place, a certain menu or when). Thanks.