I have the same problem - I am running BOINC ver. 6.4.5 in Fedora 8. I have had to reinstall, after trying to upgrade (which being from a different repo was actually 6.2.x), and can get the client running as a service, but it is almost as if the manager cannot find the client.

http://wcg.wikia.com/wiki/Unable_to_connect_to_the_core_client

If you need further help, don't hesitate to ask.

try these steps.

in the terminal

$ ps -ef | grep boinc

You should get something like this...
$ ps -ef | grep boinc
boinc 2761 1 0 Jul04 ? 00:13:55 /usr/bin/boinc --check_all_logins --redirectio --dir /var/lib/boinc-client

Also, what is in your /etc/rc.d/init.d/boinc file? it may help in figuring out what is happening.

-Uplinger

etc/rc.d/init.d/boinc:


#!/bin/sh
#
# BOINC - start and stop the BOINC client daemon on Unix
#
# Unix start/stop script to run the BOINC client as a daemon at
# system startup, as the 'boinc' user (not root!).
#
# This version works on Red Hat Linux, Fedora Core, Debian, Ubuntu, SUSE,
# Mandrake, and Slackware Linux, and should work on generic Linux systems
# provided that they have 'pidof' and a POSIX /bin/sh (most all do).
# Metadata for chkconfig and the SUSE equivalent INIT info are included below.
#
# Usage: boinc { start | stop | status | restart }
#
###
# chkconfig: 345 98 03
# description: This script starts the local BOINC client as a daemon
# For more information about BOINC (the Berkeley Open Infrastructure
# for Network Computing) see http://boinc.berkeley.edu
# processname: boinc
# config: /etc/sysconfig/boinc
#
### BEGIN INIT INFO
# Provides: boinc
# Required-Start: $network
# Required-Stop: $network
# Default-Start: 3 4 5
# Default-Stop: 0 1 2 6
# Description: This script starts the local BOINC client as a daemon
# For more information about BOINC (the Berkeley Open Infrastructure
# for Network Computing) see http://boinc.berkeley.edu
### END INIT INFO
#
# Eric Myers <myers@vassar.edu> - 27 July 2004
# Department of Physics and Astronomy, Vassar College, Poughkeepsie NY
# Eric Myers <myers@spy-hill.net>
# Spy Hill Research, Poughkeepsie, New York
# @(#) $Id: boinc,v 1.14 2008/07/14 12:52:34 myers Exp $
########################################################################

# Defaults, which can be overridden by putting new NAME=value lines
# in /etc/sysconfig/boinc (for Red Hat/Fedora Linux and variants)
# or /etc/default/boinc (for Debian/Ubuntu and variants)

# Name of user to run as:
#
BOINCUSER=boinc

# Working directory. Could be /home/boinc, /var/lib/boinc, etc..
# The reason /var/lib/boinc is preferable is that this works best for a
# cluster of computers whereas /home/anything might be shared between machines
#
BOINCDIR=/var/lib/boinc

# Name of the client executable. This is the file "boinc" if you
# unpacked the download file boinc_M.mm.rr_i686-pc-linux-gnu.sh,
# but I like to rename it and put it in a public place.
# (Hint: move boincmgr to /usr/local/bin too so anyone can easily use it).
#
BOINCEXE=/var/lib/boinc/boinc_client

# Log and error files (you should rotate these occasionally)
#
LOGFILE=boinc.log
ERRORLOG=error.log

# BOINC options for the command line when running the client.
# Be aware that --allow_remote_gui_rpc opens up your machine to the world!
# (Or at least to your local subnet)
#
#BOINCOPTS="--allow_remote_gui_rpc"
BOINCOPTS=""

# Deprecated. Was used to construct the executable name in days of old.
# (Still here just as a last ditch to find an old executable, but
# probably should be removed.)
#
BUILD_ARCH=i686-pc-linux-gnu


# Mandrake 10.1 really wants a subsys lock file ...
if [ -d /var/lock/subsys ]; then
LOCKDIR=/var/lock/subsys
elif [ -d /var/lock ]; then
LOCKDIR=/var/lock
fi

# su on Linux seems to need this to be set to work properly in a script
export TERM dumb


##
# Init script function library. This stuff is Red Hat specific,
# but if the functions are not found we create our own simple replacements.
# (The idea for replacing the functions comes from OpenAFS. Thanks guys!)

if [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
##TODO: Try to use LSB here for systems that have it?
else
export PATH=/sbin:/bin:/usr/sbin:/usr/bin
echo_success () { echo -n " [ OK ] " ; }
echo_failure () { echo -n " [FAILED] " ; }
echo_warning () { echo -n " [WARNING] " ; }
killproc() {
PID=`pidof -s -x -o $$ -o $PPID -o %PPID $1`
[ $PID ] && kill $PID ; }
fi


## Look for any local configuration settings which override all above

if [ -f /etc/sysconfig/boinc ]; then
. /etc/sysconfig/boinc
elif [ -f /etc/default/boinc ]; then
. /etc/default/boinc
fi


## Verify the working directory exists:

if [ ! -d $BOINCDIR ]; then
echo -n "Cannot find BOINC directory $BOINCDIR "
echo_failure
echo
exit 7
fi


# Some additional places to look for the client executable
# (We do this after init.d/functions and sysconfig/boinc, which sets PATH)

export PATH=$BOINCDIR:/usr/local/bin:$PATH


## Locate the executable, either boinc_client, boinc,
## or boinc_M.mm_.... with highest version number
## We only do this if BOINCEXE set above isn't found or is not executable.

if [ ! -x $BOINCEXE ]; then
BOINCEXE=`/usr/bin/which boinc_client 2>/dev/null`
if [ ! -x "$BOINCEXE" ]; then
BOINCEXE=`/usr/bin/which boinc 2>/dev/null`
if [ ! -x "$BOINCEXE" ]; then
BOINCEXE=`/bin/ls -1 $BOINCDIR/boinc_*_$BUILD_ARCH 2>/dev/null | tail -1 `
fi
fi
fi

if [ ! -x "$BOINCEXE" ]; then
echo -n "Cannot find an executable for the BOINC client."
echo_failure
echo
exit 2
fi



## Functions: $1 is one of start|stop|status|restart

case "$1" in
start)
cd $BOINCDIR

if [ -f lockfile ] ; then
echo -n "Another instance of BOINC is running (lockfile exists)."
echo_failure
echo
exit 4
fi

if [ ! -d projects ] ; then
echo -n "The BOINC client requires initialization."
echo_warning
echo
fi

echo -n "Starting BOINC client as a daemon: "
su $BOINCUSER -c "$BOINCEXE $BOINCOPTS" >>$LOGFILE 2>>$ERRORLOG &
sleep 4
PID=`pidof -s -x -o $$ -o $PPID -o %PPID $BOINCEXE`
if [ $PID ]; then
[ -d $LOCKDIR ] && touch $LOCKDIR/boinc
echo_success
else
echo_failure
fi
echo
;;

stop)
cd $BOINCDIR
if [ ! -f lockfile -a ! -f $LOCKDIR/boinc ] ; then
echo -n "BOINC is not running (no lockfiles found)."
echo_success
else
echo -n "Stopping BOINC client daemon: "
killproc $BOINCEXE && echo_success || echo_failure
# clean up in any case
rm -f $BOINCDIR/lockfile
rm -f $LOCKDIR/boinc
fi
echo
;;

restart)
$0 stop
$0 start
;;

status)
PID=`pidof -x -o $$ -o $PPID -o %PPID boinc_client`
if [ "x$PID" = "x" ]; then
PID=`pidof -x -o $$ -o $PPID -o %PPID $BOINCEXE`
fi
if [ "$PID" != "" ]; then
echo "BOINC client is running (pid $PID)."
else
if [ -f $BOINCDIR/lockfile -o -f $LOCKDIR/boinc ]; then
echo "BOINC is stopped but lockfile(s) exist."
else
echo "BOINC client is stopped."
fi
fi
;;

*)
echo "Usage: boinc {start|stop|restart|status}"
exit 1
esac

exit

#EOF#