On Mon, Apr 16, 2018 at 08:52:59AM -0700, Tony Lindgren wrote: > * Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx> [180416 15:19]: > > Since this uses a USB adapter (built onto the board) it could be > > that there could be a bug in the driver for that rather than the > > OMAP4430 SDP, but I've no way to check that hypothesis. > > Does it go away when you do a warm reboot of the sdp? Then > it should not be related to the USB iff the ftdi chip is bus > powered by VBUS. Yes, the FTDI chip is bus powered. I booted, ran vi, quit vi, saw corruption, typed reboot, waited for it to reboot, ran vi, quit vi, and still saw corruption. So the reboot seems to have had no effect. I don't see it with other USB serial consoles on other machines... I have two of these using the same FTDI chipset: Bus 001 Device 021: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC Bus 001 Device 020: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC Device 20 is the SDP board, and device 21 is a ZII board. Both use port 2 on the quad ftdi device. The serial console on the ZII board is fine, so that seems to rule out the FTDI driver / FTDI hardware. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up -- 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
