+++ This bug was initially created as a clone of Bug #760018 +++

Description of problem:

If using a wifi connection and having cifs network mounts, the machine hangs for a while during shutdown. If mounts are first removed before shutdown, or machine uses a wired connection, this does not occur.

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

9.34-2

How reproducible:

Always, at least on fedora 15 & 16. Should also manifest itself on rhel 6, but cannot confirm or deny at this time.

Steps to Reproduce:
1. Mount a network share with cifs (do not also have nfs or smbfs shares mounted, as the issue won't occur).
2. Shutdown machine (e.g: using poweroff command)
  
Actual results:

Machine pauses during shutdown, on fedora this occurs at the "F" logo during shutdown.

Expected results:

Constant shutdown progress.

Additional info:

Can be fixed by altering the section in /etc/init.d/network stop) section that looks like this:

NFSMTAB=$(LC_ALL=C awk '$3  ~ /^nfs/ { print $2 }' /proc/mounts)
SMBMTAB=$(LC_ALL=C awk '$3 == "smbfs" { print $2 }' /proc/mounts)
NCPMTAB=$(LC_ALL=C awk '$3 == "ncpfs" { print $2 }' /proc/mounts)
if [ -n "$NFSMTAB" -o -n "$SMBMTAB" -o -n "$NCPMTAB" ] ; then

to be this:

NFSMTAB=$(LC_ALL=C awk '$3  ~ /^nfs/ { print $2 }' /proc/mounts)
SMBMTAB=$(LC_ALL=C awk '$3 == "smbfs" { print $2 }' /proc/mounts)
CIFSMTAB=$(LC_ALL=C awk '$3 == "cifs" { print $2 }' /proc/mounts)
NCPMTAB=$(LC_ALL=C awk '$3 == "ncpfs" { print $2 }' /proc/mounts)
if [ -n "$NFSMTAB" -o -n "$SMBMTAB" -o -n "$CIFSMTAB" -o -n "$NCPMTAB" ] ; then

--- Additional comment from pm-rhel on 2011-12-05 04:02:59 EST ---

Since this issue was entered in bugzilla, the release flag has been
set to ? to ensure that it is properly evaluated for this release.

--- Additional comment from siology.io on 2011-12-05 17:24:49 EST ---

the fix on the end of the previous comment may have been erroneous, or at least it dosen't consistently work. The issue is real enough though, if "umount <mount>" or "service netfs stop" is first issued the shutdown completes just fine. 

the netfs and network init scripts are 75 and 90 respectively, but it seems like its not unmounting correctly before taking the network down. Possibly it needs time to complete the unmount first which it isn't getting.

--- Additional comment from notting on 2011-12-14 17:55:33 EST ---

The CIFS problem in RHEL should be fixed with a backport of:
http://git.fedorahosted.org/git/?p=initscripts.git;a=commitdiff;h=3031ac68e251d5090c3e021fb387a9ba0c8f343d

In regards to what you're seeing in Fedora, I suspect it's more related to systemd, which is only in Fedora at the time.