On Wed, 18 Jul 2012 09:45:30 +0200 "Tobias Arp" <tobiasarp@xxxxxx> wrote: > The problem occurs very quick by setting the baud rate to 230400 on a single null modem connection (without usunign the orher ports of the quad uart). So i would say you are right with your guess... > > magic: 0x5401 > > name: ttyS0 > > flags: 0x00000A00 > > count: 1 > > stopped: 0 > > hw_stopped: 1 > > flow_stopped: 0 > > packet: 0 > > low_latency: 0 > > warned: 0 > > ctrl_status: 0x00 > > receive_room: 4095 Ok that's not quite what I had expected to see So the port is in use, not stopped at the higher levels and has lots of receiver room as expected. The hw_stopped flag is the hardware state - so somehow we've missed a transition on the flow control or the UART hasn't bothered reporting it or the IRQ got lost. When it jams transmitting does it unjam if you send a single character the other way ? Alan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
