Bug 4715 - Unpluging ACM device crash the kernel
Summary: Unpluging ACM device crash the kernel
Status: REJECTED DUPLICATE of bug 4407
Alias: None
Product: Drivers
Classification: Unclassified
Component: USB (show other bugs)
Hardware: i386 Linux
: P2 blocking
Assignee: Greg Kroah-Hartman
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-06-05 22:31 UTC by Constantinos Apostolou
Modified: 2005-06-05 22:41 UTC (History)
0 users

See Also:
Kernel Version: 2.6.11.11
Subsystem:
Regression: ---
Bisected commit-id:

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Description Constantinos Apostolou 2005-06-05 22:31:42 UTC 
Distribution: I got the sources from
http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.11.11.tar.bz2 


Hardware Environment: Pentium-M/Motherboard:DFI-ACP-G5M100-N
rev1/Modem:Intracom's netmod ver5.0 firmware 3.83

Software Environment: Debian custom based on potato
Problem Description: I try to set-up ppp using a ACM usb ISDN modem. It start ok
but If I (usb unplug/modem losses power/modem losses link) the kernel crashes.

Steps to reproduce:
Compile kernel with USB ACM support
create dir /dev/usb/acm
mknod /dev/usb/acm/ttyACM0 c 166 0
put in /etc/inittab
mgetty /dev/usb/acm/ttyACM0
plugin the modem 
initq or reboot
System comes up  
It will be able to answer calls.
Now...
Unplug the usb cable from Modem and the kernel will crash.
Unplug the Main Power from the Modem and the kernel will crash.
Unplug the telephone line from the Modem and the kernel will crash.
Comment 1 Greg Kroah-Hartman 2005-06-05 22:41:44 UTC 

*** This bug has been marked as a duplicate of 4407 ***
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