Bug 77612

Summary: hotplug: spurious disconnect of usb after other updates
Product: [Retired] Red Hat Linux Reporter: adrian.lawrence
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3   
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2005-02-04 20:49:41 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Extract from /var/log/messages showing suprious disconnect none

Description adrian.lawrence 2002-11-10 22:25:21 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.6 (X11; Linux i686; U;) Gecko/20020913

Description of problem:
After applying latest updates including glibc-2.2.5-42, glibc-debug-2.2.5-42,
and friends, krb5-*--1.2.4 and nscd-2.2.5-42, hotplug
disconnects a usb device (scanner) incorrectly.

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


How reproducible:
Always

Steps to Reproduce:
1.Switch on a usb scanner
2.Inspect /var/log/messages to see the disconnect. xsane, for example cannot
connect to the scanner. Hardly surprising :-)
3.
	

Actual Results:  N/A

Expected Results:  n/a

Additional info:

Nov 10 16:09:14 conquest3 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
Nov 10 16:09:30 conquest3 kernel: usb.c: deregistering driver usbscanner
Nov 10 16:09:54 conquest3 kernel: usb.c: USB disconnect on device 1
The spurious disconnect:

Nov 10 16:09:54 conquest3 /sbin/hotplug: arguments (usb) env (PWD=/etc/hotplug
DEVICE=/proc/bus/usb/001/001 ACTION=remove DEBUG=kernel OLDPWD=/
DEVFS=/proc/bus/usb TYPE=9/0/0 SHLVL=1 HOME=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin
PRODUCT=0/0/0 _=/usr/bin/env)
Nov 10 16:09:54 conquest3 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
Nov 10 16:09:54 conquest3 kernel: usb.c: USB bus 1 deregistered
w83781d-isa-0290

Workaround:
~~~~~~~~~~~

Disable hotplug with
  echo /bin/true > /proc/sys/kernel/hotplug
and load modules manually with modprobe.
The scanner and xsane then work normally.

I doubt that this bug is in hotplug itself. Sorry, I don't have time to
investigate further. I will attach a fuller log.
Comment 1 adrian.lawrence 2002-11-10 22:32:12 UTC 
Created attachment 84464 [details]
Extract from /var/log/messages showing suprious disconnect
Comment 2 Bill Nottingham 2005-02-04 20:49:13 UTC 
Closing out bugs on older, no longer supported, releases. Apologies
for any lack of response. Please reopen if problems persist on more
current releases.