https://bugzilla.kernel.org/show_bug.cgi?id=209411 --- Comment #25 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) --- If your software isn't running, then what software issues the Get-String-Descriptor request for string descriptor 4 that causes the EPROTO error? If the same packets are present with or without your software, then your software isn't sending any packets. Is this really what you mean? In any case, the EPROTO error is caused by the code running on the phone. I can't give you much advice about that. -- You are receiving this mail because: You are watching the assignee of the bug.