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ISDN fails to initialize on SLE11SP2

This document (7008372) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11 Service Pack 2
SUSE Linux Enterprise Desktop 11 Service Pack 2


The ISDN service fails to initialize after updating to SLES11SP1. Checking /var/log/boot.msg, the following error is experienced:
Setting up ISDN card contr0 AVM C4done
Loading Driver contr0 1 kcapi capidone
Initializing capi for contr0 (1)failed

Using strace to monitor the /etc/init.d/isdn startup script the trace shows:
4274  open("/dev/capi20", O_RDWR)       = -1 ENOENT (No such file or directory)
4274  open("/dev/isdn/capi20", O_RDWR)  = -1 ENOENT (No such file or directory)
4274  write(2, "ERROR: cannot open /dev/capi20 n"..., 84) = 84
4274  exit_group(-1)



This update includes a set of RPM packages which depends on the hardware architecture (e.g. -32bit packages forx86_64). Please update capi4linux to version 2012.5.31-0.2.6. YaST2 / zypper will make sure to install the appropriate dependencies.

To locate the updates on our website, go to SUSE Patchfinder at: , then select SLES11SP2 as product and navigate down to "ISDN for Linux 6728" released on Sep 13th 2012.


Edit /etc/udev/rules.d/45-isdn.rules and move the entries from line 4
KERNEL=="capi*",                NAME="capi/%n"

one line up so they precede the line:
KERNEL=="capi",                 NAME="capi20", SYMLINK+="isdn/capi20"


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7008372
  • Creation Date: 30-May-2012
  • Modified Date:28-Sep-2022
    • SUSE Linux Enterprise Server

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