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[Launchpad Bug Tracker <1018241@xxxxxxxxxxxxxxxxxx>]

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I am trying to use Kubuntu 12.04 i386 to connect to an ISP through dial-up.
The ppp module is included in the distribution. I have a Keyspan USA-19HS
USB-to-Serial adapter connected to a US Robotics 56k modem.
The /etc/ppp/options file includes these three options:
  demand
  persist
  idle 60
Ppp connects to the ISP as expected and the remote host can be pinged.
When the connection has been idle for 60 seconds, ppp attempts to
close the USB device /dev/ttyUSB0 and a kernel panic occurs.

Disconnecting the USB device before the timeout occurs causes
pppd to terminate cleanly, but that defeats the "persist" option.

Attached is a screen shot of kernel stack trace.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu5
Architecture: i386
Date: Tue Jun 26 23:41:58 2012
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: apport-bug i386 kubuntu precise
-- 
Kernel panic with ppp and keyspan usa-19hs
https://bugs.launchpad.net/bugs/1018241
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