The serial port problem

[raeed]

Hi,

I have a problem with my SERIAL PORT /dev/ttys0

I recently joined the gentoo world (World of choices)

I really loved it

I did the following (see my PC specifications in my signature):
• Installed Gentoo AMD 64 version using the Gentoo AMD64 Universal LiveCD.
• Emerged gentoo-dev-sources (as instructed in the installation handbook).
• Did all the steps according to installation handbook.
• System is running like a rock. And everything is fine. However:

When I try to access my /dev/ttys0 so I can setup me external serial modem it gives me input / output error.

I tried the following:
# echo “test” > /dev/ttys0
It gives me the same error.
Is there a module that I should load in order to use the serial port.

I also added ttys0 and tts/0 to /etc/securetty. But that didn’t solve the problem either.
KPPP can’t connect to /dev/ttys0 either

SLAX, KNOPPIX, GNOPPIX, FEDORA CORE all running so smooth with the serial port and the external modem.

I would appreciate it if you can help me with this.
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD

[xo]

perhaps one of these
8250.ko 8250_pci.ko 8250_pnp.ko serial_core.ko
if you have built the serial drivers as modules

for example
modprobe serial_core

perhaps put them in your autoload file

newbie here so take advice with a pintch of salt
_________________
TyanTigerMP | GeForce2MX200 | AudigyPlatinum | PromiseUltra100TX2 | Realtek8139

[raeed]

I appreciate ur reply,

I'll try today and let u know the result.

Thanks alot.
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD

[raeed]

All of those modules are not found when i try to modprobe.

I don't know but there must be a problem with the kernel included on AMD64 Universal Live cd it's name si gentoo-dev-sources and i built it using genkernel.


I even serched for them under /lib/modules/2.6.7-gentoo-r11/ and they are not there

I don't know what to do.
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD

[golloza]

1) The device is called /dev/ttyS0, not /dev/ttys0

2) Check Device drivers -> Char devices -> Serial drivers in your kernel config

[raeed]

That is what i thought at the biggining after i finished installing gentoo(I used to do this with Fedora). but echoing /dev/ttyS0 gave me ttyS0 not found error.

When i loked inside /dev it turned out that there is no ttyS0 there but there is ttys0. So i concluded that this is the COM1.

Give the /dev folder a look and you'll see.

I checked the kernel and they are enabled. I used gentoo-dev-sources kernel coming from the AMD64 Universal Live CD. It's a 2.6.7-gentoo-r11
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD

[raeed]

Something strange:

when trying echo "test" > /dev/ttyS0 (with the capital S) gives me Permission denied although ttyS0 is not there under /dev i tried adding ttys0 and ttyS0 to /etc/securetty And that didn't help either.
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD

[golloza]

Are you really sure it isn't there?

ls /dev/ttyS*

Are you root when 'permission denied' appears?

[raeed]

Thanks a lot, the problem has been solved.

When I checked the kernel configuration the serial was not enabling. Strange, I clearly remember that in the installation I used the genkernel and did a modification to it to include the serial. Now, when I checked, I saw it disabled. I enabled it and recompiled it and now its working fine.

But I am still wondering what is /dev/ttys0 (small s) for? It’s still there.

Again, thanks a lot Gents. I really appreciate your replies.
_________________
AMD Athelon 64bit 3200+
ASUS K8V SE Deluxe VIA K8T800
512 MB RAM
nVidia GeForce MX 4000 128 MB
U.S.Robotics External serial modem
120 GB W.D. HD