Interestingly, when I turned isapnp=off on the command line, I got io 0x2f8-0x2ff irq 5 but I don't know how to change this or to enable the device. I thought sending AUTO to the file should do that. I tried >echo ENABLE > resources but that didn't do anything.
The comx driver is an interesting lead but I wonder if it is a red herring. When I ran sarge with the modem card physically removed, the COMX line also showed up in dmesg. The only difference was that ttyS02 is missing. modem card physically absent: > Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT > SHARE_IRQ SERIAL_PCI enabled > ttyS00 at 0x03f8 (irq = 4) is a 16550A > ttyS01 at 0x02f8 (irq = 3) is a 16550A > COMX: driver version 0.85 (C) 1995-1999 ITConsult-Pro Co. <[EMAIL PROTECTED]> modem card physically present: > Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT > SHARE_IRQ SERIAL_PCI enabled > ttyS00 at 0x03f8 (irq = 4) is a 16550A > ttyS01 at 0x02f8 (irq = 3) is a 16550A > ttyS02 at 0x03e8 (irq = 4) is a 16550A > COMX: driver version 0.85 (C) 1995-1999 ITConsult-Pro Co. <[EMAIL PROTECTED]> That is a little weird because the modem actually shows up at ttyS1. I guess the modem shows up at ttyS01 and the and the second internal UART is pushed to ttyS02. Actually, the COMX driver appears to be for a synchronous card and I believe my card is asynchronous as most modems are, so I believe that is not the driver that is actually handling my card. I think maybe the "Serial driver" handles my card but I don't really know. I have experience writing drivers but not with linux. > Do you know why the device node for ttyS1 is so recent? The /dev/ttyS1 device updates its modify time every time I run minicom. Maybe when minicom resets the device. > In order for COM2 (/dev/ttyS1) to work properly, IRQ 3 and IO-PORTS > 0x2f8-0x2ff need to be free. Look into the /proc filesystem and ... When the card is plugged in, lenny creates space for it and removes the serial card from /proc/ioports proc/ioports (modem physically removed): ... 02f8-02ff : serial ... proc/ioports (modem physically in computer): ... 0213-0213 : ISAPnP ... 0a79-0a79 : isapnp write ... where the other parts are identical. Also, there is nothing on interrupt 3 or 4 in /proc/interrupts (whether the card is inserted or not). I have never run linux under a debugger, but my inclination would be to try to do that and then put a break on access to the ttyS1 io port. Or to the plugnplay port. I don't really understand the structure of the kernel so I don't really know where to start. I guess once the card is set up for by the pnp driver and the uart at that location is disabled, the kernel doesn't have to know whether it accessing the original uart or going through the modem card. Maybe all I need to do is somehow enable the card. Another mystery, since there is nothing at 2f8, why does ttyS1 show up? Nathan On 9/10/07, Mumia W.. <[EMAIL PROTECTED]> wrote: > On 09/09/2007 04:31 PM, Nathan Salwen wrote: > > If this is the wrong list, please tell me where to repost it. > > > > I have a V1456VQH-X pnp ISA card that I only use for sending and receiving > > faxes. It worked in Sarge but I have not been able to get it to work in my > > Lenny/Sid box. > > I reinstalled sarge on a different partition and the modem still works so it > > is not a hardware issue. I believe it is a kernel issue since it works with > > kernel2.4 and not with kernel 2.6. Although it works in 2.4 (sarge) I have > > not been able to find any log messages or dmesg output to tell me exactly > > what the kernel is doing iwth it. All I know is that minicom with > > /dev/ttyS1 returns OK when I type AT. > > > > I also went to an old partition with etch i(2.6.2.6.18-3-k7 #1 SMP Mon Dec 4 > > 17:23:11 UTC 2006 i686 GNU/Linux) and it also doesn't seem to work. > > > > dmsg returns the following: > > > >> isapnp: Scanning for PnP cards... > >> isapnp: Card '56K PnP DATA FAX VOICE Modem' > >> isapnp: 1 Plug & Play card detected total > >> > > > > So it does seem like the kernel finds it. When I go to > > /sys/devices/pnp1/01:01/name I find "56K PnP DATA FAX VOICE Modem" > > and the file /sys/devices/pnp1/01:01/01:01.00/resources has "state = > > disabled" > > > > After "echo AUTO > resources" the file resources contains: > > state = disabled > > io 0x2e8-0x2ef > > irq 5 > > > > See if you can change these settings to these: > > io 0x2f8-0x2ff > irq 3 > > Try to enable it too. > > Also, try adding this on the kernel command line: > > isapnp=off > > I noticed the following for Sarge: > > crw-rw---- 1 root dialout 4, 64 2005-02-26 01:39 /dev/ttyS0 > crw-rw---- 1 root dialout 4, 65 2007-09-09 16:09 /dev/ttyS1 > crw-rw---- 1 root dialout 4, 66 2005-02-26 01:39 /dev/ttyS2 > crw-rw---- 1 root dialout 4, 67 2005-02-26 01:39 /dev/ttyS3 > crw-rw---- 1 root dialout 4, 68 2005-02-26 01:39 /dev/ttyS4 > > Do you know why the device node for ttyS1 is so recent? > > In order for COM2 (/dev/ttyS1) to work properly, IRQ 3 and IO-PORTS > 0x2f8-0x2ff need to be free. Look into the /proc filesystem and find out > what is hogging the needed resources and move whatever it is somewhere > else if possible; I don't mean to remove it from the machine :-) Just > change the resources it uses. > > Mind you, I have no idea how to do this. > > You might need to recompile your kernel with support for exotic serial > boards. Go here: "make menuconfig-> Device Drivers-> Character Devices-> > Non standard serial port support. I noticed that Sarge recognizes the > modem's serial interface right away--before any on-disk modules are > loaded. Probably the module that makes the modem available is compiled > directly into the kernel. > > I couldn't help but notice that COMX is missing from the 2.6 kernel. > It's missing from both the dmesg output and from the kernel source. > Right under the line in Sarge showing the settings for ttyS02 is this line: > > COMX: driver version 0.85 (C) 1995-1999 ITConsult-Pro Co. <[EMAIL PROTECTED]> > > That comes from <kernel-2.4-source>/drivers/net/wan/comx.c which does > not exist in kernel 2.6. It sort of sounds like they changed the way > serial ports are done for 2.6, and the old code was removed, but the new > code knows nothing about your modem. However, this may be a red herring > because comx.c is part of the 'wan' directory which seems to relate to > special Wide Area Network interfaces. > > > When I try running scanModem from linuxant it tells me that I need some > > proprietary driver from them but, as I said, the card worked in sarge. I > > don't know whether there was a decision to stop supporting some devices or > > this is a bug or I am just not configuring things right. (If it is a > > configuration issue that would also indicate a documentation bug.) I would > > like to post a bug but am not sure to which package it would go. I guess to > > the linux-image2.6 package. > > > > Any guidance would be appreciated. > > > > Thanks, > > Nathan Salwen > > > > I think your suspicion that this is a kernel bug/removed-feature is > correct. Try the other things I discussed first. If none of them work, > perhaps file a request-for-enhancement with the kernel developers. The > enhancement would be to add support for your modem. > > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
