OK.
I think it should be good to sum my problem up.
1. I am using LILO. I have edited /etc/lilo.conf so it now contains this start item which is defined as follows:
image=/boot/vmlinuz
label="linux-noacpi"
root=/dev/hda3
initrd=/boot/initrd.img
append="
noapic acpi=off splash=silent
pci=noacpi"
vga=788
read-only
The bold text is what I have edited, the rest is a copy of an item which already was in the .conf file.
2. My distro is Mandrake 10.1 community version. There is no gdm or kdm. I am not sure what this is, but mandrake provides mcc (media control center).
3. I have installed drivers for motherboard (nforce) and vga (nvidia). Before this i had to install kernel-source which was without any problem. I have tried to reinstall the drivers (both nforce and nvidia) with no success.
4. When linux is waking up, it says it cant find some master raw device in /dev/ravctl or something like that. I cant find it in /var/boot.log so I am not sure, it is quickly out of scope.
5. modprobe nvidia says nothing
6. the nvidia module is probably loaded at the linux-load time, i have added line:
nvidia
to the /etc/modprobe.preload file and it makes no problem.
This is, when I run
lsmod | grep nvidia
it says:
nvidia-agp 5788 1
nvidia 3915452 0
agpgart 27752 nvidia-agp, nvidia
Which means that the module is loaded ok.
7. During the installation of Mandrake on my system, I selected Geforce 4 (generic) driver, which was functioning ok but without the 3d acceleration support. In /etc/X11/xorg.conf i have made one change:
in Section "Device" i have changed
Driver "nv" to Driver "nvidia"
This make me not able to startx. When i put back nv, it is ok.
8. When I was in one of my previous posts saying that modprobe says someting with .ko extantion I was not right. I meant
modprobe -l nvidia, which seams to be quite similar to lsmod nvidia.
9. When I try to startx, the screen is black for about 8 seconds, then it comes back to text mode and writes the error I have written in my first post. It also writes some message coming from syslogd. It says disabling IRQ #11.
10. I have tried to switch off ACPI (or APIC?? not sure) in BIOS, then PnP in BIOS... no success.
11. The nvnet and nvsound are not printed out by lsmod | grep nv, because I dont use them, I have SB Audigy 2 for sound and Realtec NIC. But hope that the rest of the motherboard drivers is alive and kicking

) (like fast IDE and whatever it should be there).
12. now to lspci:
00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?) (revc1)
00:00.1 RAM memory: nVidia Corporation nForce2 Memory Controller 1 (rev c1)
00:00.2 RAM memory: nVidia Corporation nForce2 Memory Controller 4 (rev c1)
00:00.3 RAM memory: nVidia Corporation nForce2 Memory Controller 3 (rev c1)
00:00.4 RAM memory: nVidia Corporation nForce2 Memory Controller 2 (rev c1)
00:00.5 RAM memory: nVidia Corporation nForce2 Memory Controller 5 (rev c1)
00:01.0 ISA bridge: nVidia Corporation nForce 2 ISA Bridge (rev a4)
00:01.1 SMBus: nVidia Corporation nForce2 SMBus (MCP) (rev a2)
00:02.0 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4)
00:02.1 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4)
00:02.2 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4)
00:04.0 Ethernet Controller: nVidia Corporation nForce 2 Ethernet Controller (rev a1)
00:08.0 PCI Bridge: nVidia Corporation nForce2 External PCI Bridge (rev a3)
00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2)
00:1e.0 PCI Bridge: nVidia Corporation nForce2 AGP (rev c1)
01:06.0 Multimedia audio controller: Creative Labs SB Audigi (rev 04)
01:06.1 Input device controller: Creative Labs SB Audigi MIDI/Game port (rev 04)
01:06.2 (IEEE 1394): Creative Labs SB Audigi FireWire Port (rev 04)
01

b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
01:0d.0 FireWire (IEEE 1394): Lucent Microelectronics FW323 (rev 61)
02:00.0 VGA compatible: nVidia Corporation NV25 [GeForce Ti 4200] (rev a3)
Uffff. I had to rewrite lspci from my big computer's crt to my notebook.
I think - the last line of this pintout (lspci) looks good - it knows that I have GF TI 4200

)
SO, gurus, please ... hope this is not the case of
wrong problem
Thank you for your ideas and suggestions.
Regards,
MartinCz.