Bug 133372 - /dev/ircomm* devices are not available
/dev/ircomm* devices are not available
Product: Fedora
Classification: Fedora
Component: irda-utils (Show other bugs)
All Linux
medium Severity high
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Assigned To: Karsten Hopp
Depends On:
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Reported: 2004-09-23 12:08 EDT by Leonid Kanter
Modified: 2007-11-30 17:10 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-02-07 07:10:12 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Leonid Kanter 2004-09-23 12:08:16 EDT
Description of problem:

I need to use my mobile phone as infrared modem, but in fc3test2
device /dev/ircomm0 is absent. I had to create this device manually.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. connect usb-irda device (in my case - stir4200)
2. edit /etc/sysconfig/irda and start irda service
3. try to use infrared modem
Actual results:

/dev/ircomm0 - no such device

Expected results:

/dev/ircomm0 must be present

Additional info:

created device manually (mknod) - it works
Comment 1 Leonid Kanter 2004-09-23 12:10:16 EDT
sorry, entered wrong "assigned" and currently unable to change
Comment 2 Leonid Kanter 2004-09-23 12:37:37 EDT
right command is MAKEDEV ircomm0
Comment 3 Harald Hoyer 2004-09-24 03:51:56 EDT
hmm, or loading the module, should trigger udev, which creates this
Comment 4 Harald Hoyer 2004-09-24 04:19:12 EDT
loading ircomm-tty, triggers the device creation..
Comment 5 Leonid Kanter 2004-09-24 04:39:55 EDT
Yes, but I don't like the idea of loading ircomm_tty manually. Before
udev it was always being loaded by kmod automagically when some
application (pppd, minicom, etc) try to open /dev/ircomm0. Now it's
impossible. Loading ircomm_tty manually is not user-friendly. Look
what we have now.
[root@leon root]# service irda start
Запускается IrDA:                                          [  ОК  ]
[root@leon root]# lsmod | grep ircomm | wc -l
[root@leon root]# ls /dev/ircomm* | wc -l
ls: /dev/ircomm*: No such file or directory
[root@leon root]# cu -l /dev/ircomm0
cu: /dev/ircomm0: Line in use (it means - no device)
[root@leon root]# MAKEDEV ircomm1
[root@leon root]# cu -l /dev/ircomm1
[root@leon root]# ls -l /dev/ircomm* | wc -l

If you create one device and try to open it - module is loaded and all
  other devices are created, but module must be loaded without user
Comment 6 Eugene Kanter 2004-09-24 23:01:40 EDT
Same problem with SCSI scanner. I had to examine /etc/sysconfig/hwconf
SCANNER section and create device manually

class: SCANNER
bus: SCSI
detached: 0
device: sg1

Comment 7 Leonid Kanter 2004-09-25 17:53:04 EDT
The same for OSS emulation. Any application which use OSS will not
work out of the box until you run MAKEDEV dsp or load module manually.
Comment 8 Harald Hoyer 2004-09-27 04:05:16 EDT

*** This bug has been marked as a duplicate of 130746 ***
Comment 9 Harald Hoyer 2004-12-21 09:12:34 EST
the irda initscript should modprobe ircomm-tty, if  /dev/ircomm* is used.
Comment 10 Karsten Hopp 2005-02-03 07:28:50 EST
re: comment 9 
  It already does that. Did you by any chance happen to run one of those
  kernels without irda support ?
  What's the output of
    find /lib/modules/`uname -r`/kernel | grep ircom   ?
Comment 11 Leonid Kanter 2005-02-04 04:12:28 EST
[leon@leon po]$ find /lib/modules/`uname -r`/ | grep ircomm
[leon@leon po]$ ls -l /dev/ircomm*
ls: /dev/ircomm*: No such file or directory
[leon@leon po]$ /sbin/service irda status
irattach (pid 4536) is running...
[leon@leon po]$ /sbin/lsmod | grep ir
ircomm                 14149  0
stir4200               13637  0
irda                  121469  2 ircomm,stir4200
crc_ccitt               2112  1 irda

ircomm was just inserted manually - no devices created :(
Comment 12 Karsten Hopp 2005-02-07 06:40:20 EST
It's back to udev then, the device nodes should be created when the
ircomm module gets loaded
Comment 13 Leonid Kanter 2005-02-07 06:44:34 EST
Device nodes are created when ircomm-tty module is loaded. It's better
to do it by "modprobe ircomm-tty" in /etc/rc.d/init.d/irda, see
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=133372#c8. Udev
is OK.
Comment 14 Karsten Hopp 2005-02-07 06:57:02 EST
?? I'm confused now...

I don't care if loading ircomm (without -tty) doesn't create the
devices nodes as this won't happen if you use the initscript which
loads ircomm-tty first.
/etc/rc.d/init.d/irda already runs 'modprobe ircomm-tty', but comment
5 indicates that this didn't work. We need to find out why...
Please run the following as root and attach the output to this bugreport:
/etc/init.d/irda stop
sh -x /etc/init.d/irda start
Comment 15 Leonid Kanter 2005-02-07 07:10:12 EST
Sorry, it happened somehow that I had outdated version of irda-utils
without "modprobe ircomm-tty". With irda-utils-0.9.16-3 it's ok.

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