I have a problem with "freezing" too. It started with FreeBSD 7.0 final. With beta versions and before with Linux I didn't have a problem.
I never have a problem when I work on computer either in console or KDE.
I am a KDE user and I have Power management 'enabled":
Standby after 30, Suspend after 40 and Power off after 70 minutes. Sometimes everyday or more I found computer in the "freezing" mode but sometimes is everything okay two weeks. I don't get any errors.
I have Asus P4P800 motherbord, 512 RAM which looks okay, ATI Radeon graphics card.
dmesg:
Copyright (c) 1992-2008 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 7.0-RELEASE-p3 #0: Tue Jul 15 18:29:26 CDT 2008
root@bla.bla.com:/usr/obj/usr/src/sys/NOVA
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 2.60GHz (2605.92-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf29 Stepping = 9
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE ,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH, DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x4400<CNXT-ID,xTPR>
Logical CPUs per core: 2
real memory = 536018944 (511 MB)
avail memory = 514793472 (490 MB)
ACPI APIC Table: <A M I OEMAPIC >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <A M I OEMXSDT> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 1fef0000 (3) failed
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
cpu0: <ACPI CPU> on acpi0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
cpu1: <ACPI CPU> on acpi0
p4tcc1: <CPU Frequency Thermal Control> on cpu1
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82865 host to AGP bridge> on hostb0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
vgapci0: <VGA-compatible display> port 0xc000-0xc0ff mem 0xf4000000-0xf7ffffff,0
xfe9f0000-0xfe9fffff irq 16 at device 0.0 on pci1
vgapci1: <VGA-compatible display> mem 0xf0000000-0xf3ffffff,0xfe9e0000-0xfe9efff
f at device 0.1 on pci1
uhci0: <Intel 82801EB (ICH5) USB controller USB-A> port 0xef00-0xef1f irq 16 at
device 29.0 on pci0
uhci0: [GIANT-LOCKED]
uhci0: [ITHREAD]
usb0: <Intel 82801EB (ICH5) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801EB (ICH5) USB controller USB-B> port 0xef20-0xef3f irq 19 at
device 29.1 on pci0
uhci1: [GIANT-LOCKED]
uhci1: [ITHREAD]
usb1: <Intel 82801EB (ICH5) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801EB (ICH5) USB controller USB-C> port 0xef40-0xef5f irq 18 at
device 29.2 on pci0
uhci2: [GIANT-LOCKED]
uhci2: [ITHREAD]
usb2: <Intel 82801EB (ICH5) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801EB (ICH5) USB controller USB-D> port 0xef80-0xef9f irq 16 at
device 29.3 on pci0
uhci3: [GIANT-LOCKED]
uhci3: [ITHREAD]
usb3: <Intel 82801EB (ICH5) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb3
uhub3: 2 ports with 2 removable, self powered
ehci0: <Intel 82801EB/R (ICH5) USB 2.0 controller> mem 0xfebffc00-0xfebfffff irq
23 at device 29.7 on pci0
ehci0: [GIANT-LOCKED]
ehci0: [ITHREAD]
usb4: EHCI version 1.0
usb4: companion controllers, 2 ports each: usb0 usb1 usb2 usb3
usb4: <Intel 82801EB/R (ICH5) USB 2.0 controller> on ehci0
usb4: USB revision 2.0
uhub4: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb4
uhub4: 8 ports with 8 removable, self powered
umass0: <IN-WIN iAPP CR-e500, class 0/0, rev 2.00/0.96, addr 2> on uhub4
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib2
skc0: <3Com 3C940 Gigabit Ethernet> port 0xd800-0xd8ff mem 0xfeafc000-0xfeafffff
irq 22 at device 5.0 on pci2
skc0: 3Com Gigabit LOM (3C940) rev. (0x1)
sk0: <Marvell Semiconductor, Inc. Yukon> on skc0
sk0: Ethernet address: 00:0e:a6:2d:db:82
miibus0: <MII bus> on sk0
e1000phy0: <Marvell 88E1011 Gigabit PHY> PHY 0 on miibus0
e1000phy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX-FDX, auto
skc0: [ITHREAD]
emu10kx0: <Creative SBLive! [SB????]> port 0xdf80-0xdf9f irq 22 at device 10.0 o
n pci2
emu10kx0: [ITHREAD]
pcm0: <EMU10Kx DSP front PCM interface> on emu10kx0
pcm0: <eMicro EM28028 AC97 Codec>
pcm1: <EMU10Kx DSP rear PCM interface> on emu10kx0
pci2: <input device> at device 10.1 (no driver attached)
rl0: <D-Link DFE-530TX+ 10/100BaseTX> port 0xd400-0xd4ff mem 0xfeafbc00-0xfeafbc
ff irq 23 at device 11.0 on pci2
miibus1: <MII bus> on rl0
rlphy0: <RealTek internal media interface> PHY 0 on miibus1
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: Ethernet address: 00:40:05:39:03:de
rl0: [ITHREAD]
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH5 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x37
6,0xfc00-0xfc0f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci0
ata1: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_button0: <Power Button> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
atkbd0: [ITHREAD]
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
sio0: [FILTER]
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
sio1: [FILTER]
fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi
0
fdc0: [FILTER]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xc0000-0xccfff pnpid ORM0000 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
ppbus0: <Parallel port bus> on ppc0
ppbus0: [ITHREAD]
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ppc0: [GIANT-LOCKED]
ppc0: [ITHREAD]
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ums0: <Logitech USB-PS/2 Optical Mouse, class 0/0, rev 2.00/27.00, addr 2> on uh
ub1
ums0: 8 buttons and Z dir.
Timecounters tick every 1.000 msec
ad0: 76319MB <WDC WD800JB-00FSA0 77.07W77> at ata0-master UDMA100
acd0: DVDR <NEC DVD RW ND-1300A/1.06> at ata1-master UDMA33
SMP: AP CPU #1 Launched!
cd0 at ata1 bus 0 target 0 lun 0
cd0: <_NEC DVD_RW ND-1300A 1.06> Removable CD-ROM SCSI-0 device
cd0: 33.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <IN-WIN iAPP HS-CF 0.96> Removable Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: Attempt to query device size failed: NOT READY, Medium not present
da1 at umass-sim0 bus 0 target 0 lun 1
da1: <IN-WIN iAPP HS-MS 0.96> Removable Direct Access SCSI-0 device
da1: 40.000MB/s transfers
da1: Attempt to query device size failed: NOT READY, Medium not present
da2 at umass-sim0 bus 0 target 0 lun 2
da2: <IN-WIN iAPP HS-SM 0.96> Removable Direct Access SCSI-0 device
da2: 40.000MB/s transfers
da2: Attempt to query device size failed: NOT READY, Medium not present
da3 at umass-sim0 bus 0 target 0 lun 3
da3: <IN-WIN iAPP HS-SD/MMC 0.96> Removable Direct Access SCSI-0 device
da3: 40.000MB/s transfers
da3: Attempt to query device size failed: NOT READY, Medium not present
Trying to mount root from ufs:/dev/ad0s1a
fuse4bsd: version 0.3.9-pre1, FUSE ABI 7.8
Thanks