Hello, I would like to confirm that it's useful to file a new bug for this issue. For me, the problem I'm having is the same as we are discussing in this thread. Would it be just a duplicate? Maybe I'm missing something, because I don't know the details of the bug hunting process for Ubuntu. Can you please confirm I should open it? In this case, I can add a detailed description and dmesg logs, with debug on and the timeout error message inside. Anyway, I want to report advances in this problem. I have tested a few kernels and patches in the last weeks, and have found one combination that does solve the issue. I also checked that this patch is not yet merged into the latest vanilla stable kernel, version 4.15, released three days ago. But it patches and works also for 4.15, which is just great (at last for me). Will send the details later (or tomorrow), as soon as I get back to my computer. Paulo On Jan 29, 2018 12:54 AM, "Kai-Heng Feng"