There's a suggestion of a patch (already in 3.10-rc) that might help there, I'll try out one of the 3.10 saucy kernels (http://kernel.ubuntu.com/~kernel-ppa/mainline/) to see if they help first.
FWIW, I am on raring and this started happening only recently.
I am seeing this as well, and it seems similar to what is described in http:// comments. gmane.org/ gmane.linux. usb.general/ 86939
There's a suggestion of a patch (already in 3.10-rc) that might help there, I'll try out one of the 3.10 saucy kernels (http:// kernel. ubuntu. com/~kernel- ppa/mainline/) to see if they help first.
FWIW, I am on raring and this started happening only recently.