Вообще то , по идее , нужно начинать рассматривать проблемы такого рода с вывода в спойлер результата команды консоли :
lspci -v
тогда уже можно будет конкретно обсудить проблему и быстрее найти ответ ...
В Live режиме ubuntu-11.10-gnome_fallback-i386, засыпания наблюдались, вывод этой команды
ubuntu@ubuntu:~$ lspci -v
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
Subsystem: FIRST INTERNATIONAL Computer Inc Device 3149
Flags: bus master, 66MHz, medium devsel, latency 8
Memory at e0000000 (32-bit, prefetchable) [size=256M]
Capabilities: <access denied>
Kernel driver in use: agpgart-via
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
Flags: bus master, medium devsel, latency 0
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
Flags: bus master, medium devsel, latency 0
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
Flags: bus master, medium devsel, latency 0
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
Flags: bus master, medium devsel, latency 0
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
Flags: bus master, medium devsel, latency 0
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237/VX700 PCI Bridge (prog-if 00 [Normal decode])
Flags: bus master, 66MHz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: d1000000-d1ffffff
Prefetchable memory behind bridge: f0000000-f3ffffff
Capabilities: <access denied>
Kernel modules: shpchp
00:0c.0 CardBus bridge: ENE Technology Inc CB1410 Cardbus Controller (rev 01)
Subsystem: ENE Technology Inc CB1410 Cardbus Controller
Flags: bus master, medium devsel, latency 168, IRQ 17
Memory at 58000000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=02, subordinate=05, sec-latency=176
Memory window 0: 50000000-53fff000 (prefetchable)
Memory window 1: 54000000-57fff000
I/O window 0: 00002400-000024ff
I/O window 1: 00002800-000028ff
16-bit legacy interface ports at 0001
Kernel driver in use: yenta_cardbus
Kernel modules: yenta_socket
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80) (prog-if 8f [Master SecP SecO PriP PriO])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4390
Flags: bus master, medium devsel, latency 64, IRQ 20
I/O ports at 1430 [size=8]
I/O ports at 1424 [size=4]
I/O ports at 1428 [size=8]
I/O ports at 1420 [size=4]
I/O ports at 1400 [size=16]
I/O ports at 1000 [size=256]
Capabilities: <access denied>
Kernel driver in use: sata_via
Kernel modules: sata_via
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4390
Flags: bus master, medium devsel, latency 64, IRQ 20
[virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
[virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1]
[virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
[virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1]
I/O ports at 1410 [size=16]
Capabilities: <access denied>
Kernel driver in use: pata_via
Kernel modules: pata_via
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81) (prog-if 00 [UHCI])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4330
Flags: bus master, medium devsel, latency 64, IRQ 21
I/O ports at 1440 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81) (prog-if 00 [UHCI])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4330
Flags: bus master, medium devsel, latency 64, IRQ 21
I/O ports at 1460 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86) (prog-if 20 [EHCI])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4330
Flags: bus master, medium devsel, latency 64, IRQ 21
Memory at d0000000 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: ehci_hcd
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South]
Subsystem: FIRST INTERNATIONAL Computer Inc Device 3227
Flags: bus master, stepping, medium devsel, latency 0
Capabilities: <access denied>
Kernel modules: i2c-viapro
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4343
Flags: medium devsel, IRQ 22
I/O ports at 1800 [size=256]
Capabilities: <access denied>
Kernel driver in use: VIA 82xx Audio
Kernel modules: snd-via82xx
00:11.6 Communication controller: VIA Technologies, Inc. AC'97 Modem Controller (rev 80)
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4070
Flags: medium devsel, IRQ 22
I/O ports at 1c00 [size=256]
Capabilities: <access denied>
Kernel driver in use: VIA 82xx Modem
Kernel modules: snd-via82xx-modem
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
Subsystem: FIRST INTERNATIONAL Computer Inc Device 2820
Flags: bus master, medium devsel, latency 64, IRQ 23
I/O ports at 2000 [size=256]
Memory at d0000400 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel driver in use: via-rhine
Kernel modules: via-rhine
01:00.0 VGA compatible controller: VIA Technologies, Inc. CN700/P4M800 Pro/P4M800 CE/VN800 [S3 UniChrome Pro] (rev 01) (prog-if 00 [VGA controller])
Subsystem: FIRST INTERNATIONAL Computer Inc Device 4330
Flags: bus master, 66MHz, medium devsel, latency 64
Memory at f0000000 (32-bit, prefetchable) [size=64M]
Memory at d1000000 (32-bit, non-prefetchable) [size=16M]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel modules: viafb
ubuntu@ubuntu:~$
P.S.Под спойлером скакала кодировка