Modem Inaccessible

Slackware 10.2, kernel 2.6.16

Suddenly I cannot access my modem.

Minicom will just stay offline.

efax version 0.9
minicom version 2.1

Giving command: fax receive
I get:

efax: 12:25 opened /dev/modem
efax: 12:25 Error: tcgetattr on fd=3 failed: Input/output error
efax: 12:25 Error: fax device write: Input/output error
efax: 12:29 Error: fax device write: Input/output error
efax: 12:31 sync: dropping DTR
efax: 12:31 Error: tcgetattr on fd=3 failed: Input/output error
efax: 12:31 Error: tcgetattr on fd=3 failed: Input/output error
efax: 37:31 Error: sync: modem not responding
efax: 37:31 Error: tcgetattr on fd=3 failed: Input/output error
efax: 37:31 done, returning 2 (unrecoverable error)
There were errors (see 0717143714.log).

I tried it with kernel 2.4.31, it will not work either.

I moved over to Fedora4, same machine, same HD. Minicom is on-line and dials
and pppd dialing is working as well, meaning there is nothing wrong with the
hardware.

Here is the output of lsmod in Fed4 w/o the snd_ bits:

Module Size Used by
md5 4033 1
ipv6 268097 8
parport_pc 28933 1
lp 13001 0
parport 40585 2 parport_pc,lp
autofs4 29253 2
it87 23521 0
eeprom 7377 0
i2c_sensor 3521 2 it87,eeprom
i2c_isa 2241 0
rfcomm 42333 0
l2cap 30661 5 rfcomm
bluetooth 56133 4 rfcomm,l2cap
sunrpc 167813 1
ipt_REJECT 5569 1
ipt_state 1857 4
ip_conntrack 41497 1 ipt_state
iptable_filter 2881 1
ip_tables 19521 3 ipt_REJECT,ipt_state,iptable_filter
ide_scsi 18761 0
scsi_mod 148105 1 ide_scsi
dm_mod 58101 0
video 15941 0
button 6609 0
ac 4805 0
uhci_hcd 35152 0
ehci_hcd 41037 0
shpchp 94405 0
i2c_viapro 8017 0
i2c_core 21569 5 it87,eeprom,i2c_sensor,i2c_isa,i2c_viapro
snd_via82xx 30081 1
gameport 18633 1 snd_via82xx
soundcore 10913 2 snd
via_rhine 28361 0
mii 5441 1 via_rhine
dmfe 23525 0
floppy 65269 0
ext3 132553 3
jbd 86233 1 ext3

And here lsmod of Slack:
Module Size Used by Not tainted
i2c-dev 3620 0 (unused)
i2c-core 12676 0 [i2c-dev]
snd-pcm-oss 36736 0
snd-mixer-oss 12376 2 [snd-pcm-oss]
pci_hotplug 15236 0
uhci 24284 0 (unused)
ehci-hcd 17516 0 (unused)
usbcore 59148 1 [uhci ehci-hcd]
snd-via82xx 13376 2
gameport 1420 0 [snd-via82xx]
Module Size Used by Not tainted
i2c-dev 3620 0 (unused)
i2c-core 12676 0 [i2c-dev]
snd-pcm-oss 36736 0
snd-mixer-oss 12376 2 [snd-pcm-oss]
pci_hotplug 15236 0
uhci 24284 0 (unused)
ehci-hcd 17516 0 (unused)
usbcore 59148 1 [uhci ehci-hcd]
snd-via82xx 13376 2
gameport 1420 0 [snd-via82xx]
soundcore 3396 4 [snd]
via-rhine 12336 0 (unused)
mii 2272 0 [via-rhine]
pcmcia_core 39172 0
ide-scsi 9392 0
dmfe 12577 1
crc32 2880 0 [via-rhine dmfe]
agpgart 45508 0 (unused)
lp 6404 0
parport_pc 15044 1
parport 22824 1 [lp parport_pc]

Where could be the hitch that the modem is not responding in slackware?

Thanks for any help!
--
Peter

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

Re: Modem Inaccessible

I can't be sure, Peter, but my hunch is that you are looking in the
wrong place. I'm assuming the modem is attached to a serial port and is
not one of those pseudo-modems that requires a special module (If I'm
wrong, then you really left out important info) in what follows.

Serial port support is all but always compiled into kernels, not added
as modules. (And I don't see anything that looks like a serial-port
module in either of the lists you sent us, in any case.) But setting up
serial ports so they actually work requires running "setserial" with
appropriate values.

I'd suggest you approach this by:

(a) Finding out what /dev/modem is a symlink to
(b) Running setserial on that device (e.g., "setserial /dev/ttyS0") to
see what settings are present.

If they are different between Slackware and Fedora, that points to your
problem. If you can't spot it yourself, post here the COMPLETE results
of this testing and probably someone can help you spot it.

You might also check the init-script sructures of the two distros to see
where and how (and even if) both run setserial.

Peter wrote:
> Slackware 10.2, kernel 2.6.16
>
> Suddenly I cannot access my modem.
>
> Minicom will just stay offline.
>
> efax version 0.9
> minicom version 2.1
>
> Giving command: fax receive
> I get:
>
> efax: 12:25 opened /dev/modem
> efax: 12:25 Error: tcgetattr on fd=3 failed: Input/output error
> efax: 12:25 Error: fax device write: Input/output error
> efax: 12:29 Error: fax device write: Input/output error
> efax: 12:31 sync: dropping DTR
> efax: 12:31 Error: tcgetattr on fd=3 failed: Input/output error
> efax: 12:31 Error: tcgetattr on fd=3 failed: Input/output error
> efax: 37:31 Error: sync: modem not responding
> efax: 37:31 Error: tcgetattr on fd=3 failed: Input/output error
> efax: 37:31 done, returning 2 (unrecoverable error)
> There were errors (see 0717143714.log).
>
> I tried it with kernel 2.4.31, it will not work either.
>
> I moved over to Fedora4, same machine, same HD. Minicom is on-line and dials
> and pppd dialing is working as well, meaning there is nothing wrong with the
> hardware.
>
> Here is the output of lsmod in Fed4 w/o the snd_ bits:
>
> Module Size Used by
> md5 4033 1
> ipv6 268097 8
> parport_pc 28933 1
> lp 13001 0
> parport 40585 2 parport_pc,lp
> autofs4 29253 2
> it87 23521 0
> eeprom 7377 0
> i2c_sensor 3521 2 it87,eeprom
> i2c_isa 2241 0
> rfcomm 42333 0
> l2cap 30661 5 rfcomm
> bluetooth 56133 4 rfcomm,l2cap
> sunrpc 167813 1
> ipt_REJECT 5569 1
> ipt_state 1857 4
> ip_conntrack 41497 1 ipt_state
> iptable_filter 2881 1
> ip_tables 19521 3 ipt_REJECT,ipt_state,iptable_filter
> ide_scsi 18761 0
> scsi_mod 148105 1 ide_scsi
> dm_mod 58101 0
> video 15941 0
> button 6609 0
> ac 4805 0
> uhci_hcd 35152 0
> ehci_hcd 41037 0
> shpchp 94405 0
> i2c_viapro 8017 0
> i2c_core 21569 5 it87,eeprom,i2c_sensor,i2c_isa,i2c_viapro
> snd_via82xx 30081 1
> gameport 18633 1 snd_via82xx
> soundcore 10913 2 snd
> via_rhine 28361 0
> mii 5441 1 via_rhine
> dmfe 23525 0
> floppy 65269 0
> ext3 132553 3
> jbd 86233 1 ext3
>
> And here lsmod of Slack:
> Module Size Used by Not tainted
> i2c-dev 3620 0 (unused)
> i2c-core 12676 0 [i2c-dev]
> snd-pcm-oss 36736 0
> snd-mixer-oss 12376 2 [snd-pcm-oss]
> pci_hotplug 15236 0
> uhci 24284 0 (unused)
> ehci-hcd 17516 0 (unused)
> usbcore 59148 1 [uhci ehci-hcd]
> snd-via82xx 13376 2
> gameport 1420 0 [snd-via82xx]
> Module Size Used by Not tainted
> i2c-dev 3620 0 (unused)
> i2c-core 12676 0 [i2c-dev]
> snd-pcm-oss 36736 0
> snd-mixer-oss 12376 2 [snd-pcm-oss]
> pci_hotplug 15236 0
> uhci 24284 0 (unused)
> ehci-hcd 17516 0 (unused)
> usbcore 59148 1 [uhci ehci-hcd]
> snd-via82xx 13376 2
> gameport 1420 0 [snd-via82xx]
> soundcore 3396 4 [snd]
> via-rhine 12336 0 (unused)
> mii 2272 0 [via-rhine]
> pcmcia_core 39172 0
> ide-scsi 9392 0
> dmfe 12577 1
> crc32 2880 0 [via-rhine dmfe]
> agpgart 45508 0 (unused)
> lp 6404 0
> parport_pc 15044 1
> parport 22824 1 [lp parport_pc]
>
> Where could be the hitch that the modem is not responding in slackware?
>
> Thanks for any help!

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

Re: Modem Inaccessible

Thanks Ray!

ray@comarre.com said:
> I'm assuming the modem is attached to a serial port

Yes, has been for years.

ls -l /dev/modem
lrwxrwxrwx 1 root root 10 2006-07-18 20:29 /dev/modem -> /dev/tts/1

sudo /sbin/setserial /dev/ttyS1 -a

/dev/ttyS1, Line 1, UART: unknown, Port: 0x02f8, IRQ: 3
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test auto_irq

ttyS1 used to be the place from which to run the modem I know for sure when I
had kppp installed.

sudo /sbin/setserial /dev/ttyS2 -a

/dev/ttyS2, Line 2, UART: unknown, Port: 0x03e8, IRQ: 4
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test auto_irq

Now this is the output in Fed4 at 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

To which modem etc. connects properly.

Doing
sudo /sbin/setserial /dev/ttyS1 uart 16550A
I get
heisspf@~:$ sudo /sbin/setserial /dev/ttyS1 -a
/dev/ttyS1, Line 1, UART: 16550A, Port: 0x02f8, IRQ: 3
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test auto_irq

With microcom which I snatched from my DSL box where again the modem is
working properly:
sudo /usr/local/Microcom/microcom
Try /dev/ttyS0
/dev/ttyS0 not found
Try /dev/ttyS1
/dev/ttyS1 not responding (after I set the uart 16550A)

Try /dev/ttyS2
/dev/ttyS2 not responding

Try /dev/ttyS3
/dev/ttyS3 not responding

In this kernel 2.6.16 there is no more ttyS0 instead /dev/tts/1 to 3. I know
it was working with kernel 2.6.14 but now it does not even work with 2.4.31.

Something broke somewhere.

Fedora4 does not run setserial neither does DSL.

Regards
--
Peter

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

Re: Modem Inaccessible

See comments below.

Peter wrote:
> Thanks Ray!
>
> ray@comarre.com said:
>
>>I'm assuming the modem is attached to a serial port
>
>
> Yes, has been for years.
>

It would help, Peter, if you were more thorough about indicating which
configuration each report is from, I'm assuming the next few entries are
from the Slackware version that does NOT work.

> ls -l /dev/modem
> lrwxrwxrwx 1 root root 10 2006-07-18 20:29 /dev/modem -> /dev/tts/1
>
> sudo /sbin/setserial /dev/ttyS1 -a
>
> /dev/ttyS1, Line 1, UART: unknown, Port: 0x02f8, IRQ: 3
> Baud_base: 115200, close_delay: 50, divisor: 0
> closing_wait: 3000
> Flags: spd_normal skip_test auto_irq
>
> ttyS1 used to be the place from which to run the modem I know for sure when I
> had kppp installed.
>
> sudo /sbin/setserial /dev/ttyS2 -a
>
> /dev/ttyS2, Line 2, UART: unknown, Port: 0x03e8, IRQ: 4
> Baud_base: 115200, close_delay: 50, divisor: 0
> closing_wait: 3000
> Flags: spd_normal skip_test auto_irq

If the above is Slackware, then ...

1. What does "sudo /sbin/setserial /dev/ttyS0 -a" report for it?

2. What does "sudo /sbin/setserial /dev/tts/1 -a" report for it?

3. What does "sudo /sbin/setserial /dev/tts/0 -a" (assuming there is a 0
there) report for it?

4. During init, does anything about serial ports appear in dmesg output?
If so, quote it in your reply.

As a general matter, the "UART: unknown" is usually (in my actual
experience, always) an indicator that the device entry is not pointing
to an actual serial port.

> Now this is the output in Fed4 at 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
>
> To which modem etc. connects properly.

I don't know what "modem etc." means. Do you mean that in Fedora,
/dev/modem is a symlink to this device?

> Doing
> sudo /sbin/setserial /dev/ttyS1 uart 16550A
> I get
> heisspf@~:$ sudo /sbin/setserial /dev/ttyS1 -a
> /dev/ttyS1, Line 1, UART: 16550A, Port: 0x02f8, IRQ: 3
> Baud_base: 115200, close_delay: 50, divisor: 0
> closing_wait: 3000
> Flags: spd_normal skip_test auto_irq

Are you back to talking about the Slackware setup again? If so, setting
the UART by hand doesn't help if the device is not actually pointing to
physical hardware.

> With microcom which I snatched from my DSL box where again the modem is
> working properly:

Is the "DSL box" a physically different computer, or the same one booted
differently? And are we once again back to Slackware again?

> sudo /usr/local/Microcom/microcom
> Try /dev/ttyS0
> /dev/ttyS0 not found

This is odd. What does "ls -l /dev/ttyS*" report?

> Try /dev/ttyS1
> /dev/ttyS1 not responding (after I set the uart 16550A)
>
> Try /dev/ttyS2
> /dev/ttyS2 not responding
>
> Try /dev/ttyS3
> /dev/ttyS3 not responding
>
> In this kernel 2.6.16 there is no more ttyS0 instead /dev/tts/1 to 3. I know
> it was working with kernel 2.6.14 but now it does not even work with 2.4.31.

Did it used to work with 2.4.31? Or is what you are describing in fact
te result of kernel updates? If you go back to a Slackware kernel that
the modem presiously worked with, does it once again work?

Peter, there is a real and important difference between these two
descriptions:

"The modem suddenly stopped working"
"I changed to a new kernel and the modem doesn't work"

Which of them is the correct summary of your Slackware observations?

> Something broke somewhere.
>
> Fedora4 does not run setserial neither does DSL.

How do you know? Did you grep for "setserial" in the appropriate
directory (probably /etc/init.d)? If not, how did you check this?

> Regards

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

Re: Modem Inaccessible

On 07-18, Ray Olszewski wrote:
> See comments below.
>
> Peter wrote:
> >Thanks Ray!
> >
> >ray@comarre.com said:
> >
> >>I'm assuming the modem is attached to a serial port
> >
> >
> >Yes, has been for years.

Been watching the thread and wonder if the following will
help since I am running Slack10.2, 2.6.13 on one machine:

BIOS boot reports standard Com1 Com2 parameters.. Default..

Linux 2.6.13 boot; setserial /dev/ttyS0 and /dev/ttyS1 reports exact
same parameters; normal.. Both UART 16550A.. The on board LSI chip
seemingly AOK..

I see no mention of /dev/tts anywhere on my machine..

dmesg reports standard ttyS0 and ttyS1, normal.. This is the bundled
kernel that Slackware calls test26.

If I hang an external modem on either port; normal..

Probably no help, just a thought..

--

Hal - in Terra Alta, WV/US - Slackware GNU/Linux 10.1 (2.4.29)
..
-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs

Re: Modem Inaccessible

OK, I do not have anymore a /dev/ttyS0. Why, I have no idea. And that seems to
be the reason that the modem does not respond.

Now I created the device node with mknod /dev/ttyS0 c 4 64, with permissions
set to root:tty.

Then I get
setserial /dev/ttyS0 -a
/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 auto_irq

and the modem responds to minicom, microcom and fax receive/send.

ray@comarre.com said:
>> Fedora4 does not run setserial neither does DSL.
> How do you know? Did you grep for "setserial" in the appropriate directory
> (probably /etc/init.d)? If not, how did you check this?

That is exactly what I did, grep for setserial in the appropriate directories.

Yes with kernels 2.4.31, 2.6.14 I had a /dev/ttys0, however, not anymore with
kernel 2.6.20. With kernel 2.17 modem responded to a setting of a symlink to
/dev/tts/1.

This symlink I kept with kernel 2.6.20 and the trouble started.

Just now I resolved the issue. In /etc/udev/rules.d/modem.rules I changed the
setting from NAME="/dev/tts/1" to NAME="ttyS0". Then running rc.udev and I
have my
/dev/ttyS0 back.

ls -l /dev/modem
lrwxrwxrwx 1 root root 5 2006-07-19 14:26 /dev/modem -> ttyS0

Much appreciated your help.

Regards

--
Peter

-
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs