Hi, here is the output from lsmod (sorry quite long) - as another update I stopped xscreensaver from running but the same thing happened last night.
[rhaynes@rhaynes ~]$ /sbin/lsmod
Module Size Used by
ppdev 8228 0
parport_pc 32036 1
lp 10568 0
parport 33320 3 ppdev,parport_pc,lp
ipt_IFWLOG 3652 1
ipt_psd 44360 1
ip_set_iptree 7208 2
iptable_raw 2368 0
xt_policy 4224 21
xt_multiport 3776 5
ipt_ULOG 7044 0
ipt_TTL 2624 0
ipt_ttl 2336 0
ipt_TOS 2560 0
ipt_tos 2144 0
ipt_TCPMSS 4160 0
ipt_set 2880 2
ipt_SAME 2848 0
ipt_REJECT 5024 4
ipt_REDIRECT 2720 0
ipt_recent 10028 0
ipt_owner 2432 0
ipt_NETMAP 2624 0
ipt_MASQUERADE 3808 0
ipt_LOG 7072 10
ipt_iprange 2336 0
ipt_hashlimit 7976 0
ipt_ECN 3296 0
ipt_ecn 2624 0
ipt_DSCP 2560 0
ipt_dscp 2176 0
ipt_CLUSTERIP 7460 0
ipt_ah 2368 0
ipt_addrtype 2304 0
ip_set_portmap 4800 0
ip_set_macipmap 4740 0
ip_set_ipmap 4768 0
ip_set_iphash 7780 0
ip_set 18972 11 ip_set_iptree,ipt_set,ip_set_portmap,ip_set_macipmap,ip_set_ipmap,ip_set_iphash
ip_nat_tftp 2144 0
ip_nat_snmp_basic 9604 0
ip_nat_sip 4064 0
ip_nat_pptp 5444 0
ip_nat_irc 2784 0
ip_nat_h323 6304 0
ip_nat_ftp 3520 0
ip_nat_amanda 2464 0
ip_conntrack_tftp 3960 1 ip_nat_tftp
radeon 113472 2
ip_conntrack_sip 6704 1 ip_nat_sip
drm 62420 3 radeon
ip_conntrack_pptp 9968 1 ip_nat_pptp
ip_conntrack_netbios_ns 3008 0
ip_conntrack_irc 5840 1 ip_nat_irc
ip_conntrack_h323 45820 1 ip_nat_h323
ip_conntrack_ftp 6800 1 ip_nat_ftp
ip_conntrack_amanda 4072 1 ip_nat_amanda
xt_tcpmss 2688 0
xt_pkttype 2368 4
xt_physdev 2896 0
xt_NFQUEUE 2528 0
xt_MARK 2848 0
xt_mark 2400 0
xt_mac 2432 0
xt_limit 2944 0
xt_length 2496 0
xt_helper 2720 0
xt_dccp 3652 0
xt_conntrack 2848 0
xt_CONNMARK 2784 0
xt_connmark 2496 0
xt_CLASSIFY 2368 0
xt_tcpudp 3648 11
xt_state 2560 17
iptable_nat 7492 0
ip_nat 15468 12 ipt_SAME,ipt_REDIRECT,ipt_NETMAP,ipt_MASQUERADE,ip_nat_tftp,ip_nat_sip,ip_nat_pp
p,ip_nat_irc,ip_nat_h323,ip_nat_ftp,ip_nat_amanda,iptable_nat
ip_conntrack 48160 24 ipt_MASQUERADE,ip_nat_tftp,ip_nat_snmp_basic,ip_nat_sip,ip_nat_pptp,ip_nat_irc,i
_nat_h323,ip_nat_ftp,ip_nat_amanda,ip_conntrack_tftp,ip_conntrack_sip,ip_conntra
k_pptp,ip_conntrack_netbios_ns,ip_conntrack_irc,ip_conntrack_h323,ip_conntrack_f
p,ip_conntrack_amanda,xt_helper,xt_conntrack,xt_CONNMARK,xt_connmark,xt_state,ip
able_nat,ip_nat
iptable_mangle 2976 1
nfnetlink 5752 2 ip_nat,ip_conntrack
iptable_filter 3104 1
ip_tables 12580 4 iptable_raw,iptable_nat,iptable_mangle,iptable_filter
x_tables 11940 47 ipt_IFWLOG,ipt_psd,xt_policy,xt_multiport,ipt_ULOG,ipt_TTL,ipt_ttl,ipt_TOS,ipt_t
s,ipt_TCPMSS,ipt_set,ipt_SAME,ipt_REJECT,ipt_REDIRECT,ipt_recent,ipt_owner,ipt_N
TMAP,ipt_MASQUERADE,ipt_LOG,ipt_iprange,ipt_hashlimit,ipt_ECN,ipt_ecn,ipt_DSCP,i
t_dscp,ipt_CLUSTERIP,ipt_ah,ipt_addrtype,xt_tcpmss,xt_pkttype,xt_physdev,xt_NFQU
UE,xt_MARK,xt_mark,xt_mac,xt_limit,xt_length,xt_helper,xt_dccp,xt_conntrack,xt_C
NNMARK,xt_connmark,xt_CLASSIFY,xt_tcpudp,xt_state,iptable_nat,ip_tables
eth1394 17188 0
tulip 47552 0
bridge 49112 0
af_packet 17768 2
ipv6 237088 14
snd_seq_dummy 3492 0
snd_seq_oss 31168 0
snd_seq_midi_event 6944 1 snd_seq_oss
snd_seq 49232 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 40192 0
snd_mixer_oss 15904 1 snd_pcm_oss
snd_emu10k1 117600 0
snd_rawmidi 19744 1 snd_emu10k1
snd_ac97_codec 96708 1 snd_emu10k1
snd_ac97_bus 2720 1 snd_ac97_codec
snd_pcm 69892 3 snd_pcm_oss,snd_emu10k1,snd_ac97_codec
snd_seq_device 7052 5 snd_seq_dummy,snd_seq_oss,snd_seq,snd_emu10k1,snd_rawmidi
snd_timer 19396 3 snd_seq,snd_emu10k1,snd_pcm
snd_page_alloc 8552 2 snd_emu10k1,snd_pcm
snd_util_mem 4192 1 snd_emu10k1
snd_hwdep 7396 1 snd_emu10k1
snd 46276 11 snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_emu10k1,snd_rawmidi,snd_ac97_c
dec,snd_pcm,snd_seq_device,snd_timer,snd_hwdep
soundcore 7936 1 snd
ide_cd 35616 0
binfmt_misc 9704 1
loop 15208 0
ext3 125896 1
jbd 51220 1 ext3
sg 30584 0
dm_mirror 18960 0
dm_mod 49560 1 dm_mirror
sata_promise 9604 0
floppy 55108 0
cpufreq_ondemand 6956 0
cpufreq_conservative 6920 0
cpufreq_powersave 2272 0
p4_clockmod 5476 0
speedstep_lib 4388 1 p4_clockmod
freq_table 4704 1 p4_clockmod
hw_random 5560 0
intel_agp 22684 1
agpgart 27048 2 drm,intel_agp
usb_storage 88612 0
ohci1394 31824 0
ieee1394 286040 2 eth1394,ohci1394
usbhid 50304 0
ehci_hcd 28968 0
usblp 12192 0
uhci_hcd 20912 0
usbcore 113344 6 usb_storage,usbhid,ehci_hcd,usblp,uhci_hcd
tsdev 6880 0
evdev 8672 0
reiserfs 254788 3
sd_mod 18368 6
ahci 16068 0
ata_piix 10820 5
libata 60620 3 sata_promise,ahci,ata_piix
scsi_mod 118472 5 sg,usb_storage,sd_mod,ahci,libata