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

[Kfir Lavi]

On Sat, Nov 5, 2011 at 2:30 PM, <bill.longman@×××××.com> wrote:

> Is there some inittab setting that's different on your laptop?
>
>
>
> -- Sent from my HP TouchPad
> ------------------------------
> On Nov 5, 2011 2:21 AM, Kfir Lavi <lavi.kfir@×××××.com> 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
>
No, it is the same as in the other laptop or servers.

Kfir