Are you still having issues with this bug?
Are you saying that all four ports did work and now they don't with the same kernel version? If so, it could be a HW issue rather than a kernel one, as there is almost certainly no problem with the driver it's using (Serial: 8250).
Are you still having issues with this bug?
Are you saying that all four ports did work and now they don't with the same kernel version? If so, it could be a HW issue rather than a kernel one, as there is almost certainly no problem with the driver it's using (Serial: 8250).