Ok, The problem is I don't know what kind of information I can give. What I can say is the transfer takes 10 minutes via usb to serial instead of 30 seconds via the standard DB9 connector. On Wed, Oct 15, 2008 at 11:46 AM, Stroller wrote: > > On 15 Oct 2008, at 10:35, Jean-Marc Beaune wrote: > > ... > I'm trying to use usb to serial converter, the data transfer works but > it's very very slow. > > I use FTDI converter with kernel 2.6.25-r7 build in driver. > > How could I trave where the problem comes from? > > > Unless you give more information one might assume that your slowness is > only that inherent in a serial connection. > > Stroller. > > -- Jean-Marc