Re: [gentoo-user] [OT] laptop desktop serial connection don't work on one direction

[Jeremy McSpadden]

My question is why the hell would you want to connect it over serial? Try ethernet, its much faster.

--
Jeremy
On Nov 5, 2011, at 4:20 AM, Kfir Lavi wrote:

> Hi all,
> I have a problem connecting my laptop to my server at home with a serial cable.
> I have cable end for /dev/ttyS0 and 2 cable ends for /dev/ttyUSB0.
> This lets me test the connection between all serial outputs.
> Desktop1-minicom <-> Desktop2-minicom
> works with all connections, i.e ttyUSB0 <-> ttyUSB0, or ttyS0 <-> ttyUSB0 and viseversa.
> So when connecting 2 desktop computers everything works as expected.
>
> The problem:
> When I connect my laptop to any of those desktops, I get just one way connection!
> If I swap the sides of the cable, the one way connection switch side.
> The laptop doesn't have ttyS0, so it have to be connected via ttyUSB0
> When I swap sides, it is just between two usb dongles.
>
> The usb dongles are PL2303 both sides.
> Settings of minicom is 38400 8n1  Hardware Flow Control=OFF
>
> Laptop setserial:
> setserial -a /dev/ttyUSB0
> /dev/ttyUSB0, Line 0, UART: 16654, Port: 0x0000, IRQ: 0
>         Baud_base: 460800, close_delay: 0, divisor: 0
>         closing_wait: infinte
>         Flags: spd_normal
>
> Desktop1 setserial:
> setserial -a /dev/ttyS0
> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
>         Baud_base: 115200, close_delay: 50, divisor: 0
>         closing_wait: 3000
>         Flags: spd_normal skip_test
>
> setserial -a /dev/ttyUSB0
> /dev/ttyUSB0, Line 0, UART: 16654, Port: 0x0000, IRQ: 0
>         Baud_base: 460800, close_delay: 0, divisor: 0
>         closing_wait: infinte
>         Flags: spd_normal
>
> I tried to add the skip_test but this seems to be not working.
> I'm not sure what to do next.
>
> Any help will be appreciated,
> Thanks,
> Kfir