Re: Serial port seemingly not working

[Bob Alexander <bob@ngi.it>]

Hannuman Bull wrote:
> Bob Alexander wrote:
>
> > Dear Debfriends :)
> >
> > I am attaching my GPS to a serial port under a Debian sid system with 
> > a custom built 2.6.11.4 kernel and it does not seem to work. HArdware 
> > is an IBM Thinkpad T40 (serial port on the port replicator).
> >
> > Same hardware booted with XP works :(
> >
> > Not sure I am doing the proper things to have the bloody serial working.
> >
> > These are the options I believe are of relevance in my kernel config:
> >
> > bob@t40:/usr/src/linux-2.6.11.4$ grep SERIAL .config |grep -v ^#
> > CONFIG_SERIAL_8250=m
> > CONFIG_SERIAL_8250_CS=m
> > CONFIG_SERIAL_8250_ACPI=y
> > CONFIG_SERIAL_8250_NR_UARTS=4
> > CONFIG_SERIAL_CORE=m
> > CONFIG_USB_SERIAL=m
> > CONFIG_USB_SERIAL_VISOR=m
> >
> > in dmesg I see
> > bob@t40:/usr/src/linux-2.6.11.4$ dmesg |grep tty
> > ttyS0: LSR safety check engaged!
> > ttyS0: LSR safety check engaged!
> >
> > bob@t40:~$ lsmod | grep -v ^ip|grep -v ^snd |sort
> > 8250                   24292  1 8250_pci
> > 8250_pci               18560  0
> > aes_i586               39232  0
> > af_key                 32784  0
> > agpgart                35048  2 drm,intel_agp
> > blowfish                8256  0
> > cdrom                  41376  1 ide_cd
> > drm                    67412  2 radeon
> > e1000                  88756  0
> > ehci_hcd               32904  0
> > evdev                   9408  0
> > fan                     4548  0
> > fat                    41372  1 vfat
> > hw_random               5524  0
> > ibm_acpi               23264  0
> > ide_cd                 42052  0
> > intel_agp              23196  1
> > Module                  Size  Used by
> > ntfs                  112304  1
> > pcmcia                 25672  4
> > pcmcia_core            50084  3 pcmcia,yenta_socket,rsrc_nonstatic
> > radeon                 78528  1
> > rsrc_nonstatic          9344  1 yenta_socket
> > serial_core            23296  1 8250
> > serpent                14336  0
> > sha256                  9664  0
> > thermal                13448  0
> > twofish                38720  0
> > uhci_hcd               33168  0
> > usbcore               125368  4 ehci_hcd,usbhid,uhci_hcd
> > usbhid                 27392  0
> > vfat                   14080  1
> > yenta_socket           23304  2
> >
> >
> > How do I understand if my serial is working under linux, if ttyS0 is 
> > this serial etc etc
> >
> > Thank you,
> > Bob
> I'm using debian sarge with autoserial.  If you're not using autoserial, 
> you might need to uncomment one of the lines in your /etc/serial.conf 
> file.  You can check your current serial status by typing
> "setserial -g /dev/ttyS[0-3]". My results look like this:
>
> /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
> /dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
> /dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
> /dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
>
> I have a Garmin GPS 76 GPS hooked up to /dev/ttyS0.  I can view the gps 
> stream using minicom (serial device: /dev/ttyS0, baud rate: 4800).
>
> Hope this helps,
>
> Hannuman

Dear Hannuman,
thank you for helping me.

I am quite confused.

bob@t40:~$ setserial -g /dev/ttyS[0-3]
/dev/ttyS0: No such device
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3

How can understand if/which port is coupled to my physical serial port ?

What is autoserial ?

I see a /var/lib/setserial/autoserial.conf with
/dev/ttyS0 uart 16550A port 0x03f8 irq 4 baud_base 115200 spd_normal 
skip_test

I have no /etc/serial.conf

Hope you will have some more ideas.

Thanks
Bob