Suspend to ram 2.6.20-rc4

I have problem with suspending my laptop (Toshiba Tecra M5-384 - Core2Duo, Nvidia Quadro NVS110, Intel SATA HDD controler on pIIx SATA driver).
Problem occurs in kernel 2.6.19, 2.6.19.1 and 2.6.20 all versions including rc4. I haven't tested any older kernels.

When I try to suspend to RAM (echo mem > /sys/power/state) system start suspend
process. I can see on the console that second CPU is down and some messages saying that USB ports are also stopped. Then screen becomes black (off) but CPU
fan is working and power LED is green (should blink). I can't connect to the computer from network and SysRq keys don't work.
I try to suspend from runlevel 1 or 2 witch no modules loaded.

Entering s3_sleep=bios as kernel parameter doesn't help

I tried to turn pm_trace on. It shows this in dmesg:

ACPI: (supports S0 S3 S4 S5)
Magic number: 7:0:150
hash matches device ttyp4

I don't know if it has any sens. In documentation they say that pm_trace is for debugging resume after suspend, but it show sth.

My lspci:
0000:00:00.0 Host bridge: Intel Corporation Mobile Memory Controller Hub (rev 03)
0000:00:01.0 PCI bridge: Intel Corporation Mobile PCI Express Graphics Port (rev 03)
0000:00:1b.0 0403: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
0000:00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
0000:00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
0000:00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
0000:00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 02)
0000:00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 02)
0000:00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 02)
0000:00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 02)
0000:00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
0000:00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 0000:00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
0000:00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controllers cc=IDE (rev 02)
0000:01:00.0 VGA compatible controller: nVidia Corporation: Unknown device 01da (rev a1)
0000:02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
0000:05:00.0 Network controller: Intel Corporation: Unknown device 4222 (rev 02)
0000:06:0b.0 CardBus bridge: Texas Instruments: Unknown device 8039 0000:06:0b.1 FireWire (IEEE 1394): Texas Instruments: Unknown device 803a 0000:06:0b.3 0805: Texas Instruments: Unknown device 803c