[ltp] RH 7.1, TP21 no /dev/ttySx working

[Friedemann Baitinger]

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folks, please ignore this posting. I didn't do my homework before
posting. It turned out that the 'wvlan_cs' grabbed IRQ-3. Obviously
/dev/ttyS1 did not work. Back in my RH 7.0 I had massaged
/etc/pcmcia/config.opts to exclude IRQ-3 and it appears that with the
new install the exclude was left commented out.

After enabling the exclude the serial module was happy again. -- Sorry
for the confusion.

On Tue, 1 May 2001, Friedemann Baitinger wrote:

> is anybody able to use /dev/ttyS{0,1,2} on a T21 with RedHat 7.1? I have
> no luck at all. With RH 7.0 and linux-2.2.18 it worked perfectly. Now I
> have installed RH 7.1 and have not changed anything in the T21 BIOS (no
> tpctl or PS2.EXE used) and the serial module just doesn not work.
> 
> Upon loading the driver reports:
> 
> May  1 12:53:51 blackbox kernel: Serial driver version 5.05a
> (2001-03-20) with MANY_PORTS SHARE_IRQ SERIAL_PCI enabled
> 
> Here is how the devices are set in the /dev tree:
> 
> [root@blackbox baiti]# ll /dev/ttyS{0,1,2}
> crw-rw----    1 root     uucp       4,  64 Mar 24 05:38 /dev/ttyS0
> crw-rw----    1 root     uucp       4,  65 Mar 24 05:38 /dev/ttyS1
> crw-rw----    1 root     uucp       4,  66 Mar 24 05:38 /dev/ttyS2
> 
> And here is what minicom achieves when it tries to talk to a US Robotics
> modem attached to /dev/ttyS1: (I am copying only the relevant system
> calls):
> 
> open("/dev/modem", O_RDWR|O_NONBLOCK)   = -1 ENOSYS (Function not implemented)
> open("/dev/modem", O_RDWR|O_NONBLOCK)   = -1 ENOSYS (Function not implemented)
> open("/dev/modem", O_RDWR|O_NONBLOCK)   = 3
> 
> why does open() return -1 twice and then all of a sudden give back a
> file descriptor?
> 
> fcntl64(3, F_GETFL)                     = 0x802 (flags
> O_RDWR|O_NONBLOCK)
> fcntl64(3, F_SETFL, O_RDWR)             = 0
> ioctl(3, TCGETS, 0xbffff560)            = -1 EIO (Input/output error)
> ioctl(3, TIOCMGET, [0])                 = -1 EIO (Input/output error)
> ioctl(3, TCGETS, 0xbffff4d0)            = -1 EIO (Input/output error)
> ioctl(3, SNDCTL_TMR_START, {B38400 -opost -isig -icanon -echo ...}) = -1
> EIO (In
> put/output error)
> ioctl(3, TIOCMGET, [0])                 = -1 EIO (Input/output error)
> ioctl(3, TIOCMSET, [TIOCM_RTS])         = -1 EIO (Input/output error)
> ioctl(3, TCGETS, 0xbffff470)            = -1 EIO (Input/output error)
> ioctl(3, SNDCTL_TMR_START, {B1000000 -opost isig -icanon echo ...}) = -1 EIO (In
> put/output error)
> 
> Oh BTW: /dev/modem is a symlink to /dev/ttyS1
> 
> 
> Any ideas? The problem occurs with the standard kernel that came with RH
> 7.1 and it also occurs with my own-built linux-2.4.4
> 
> --
> Friedemann Baitinger      fb@baiti.net       http://baiti.net/fb/
> 

- -- 
Friedemann Baitinger      fb@baiti.net       http://baiti.net/fb/
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