Attaching the files..

you can still use the ipw3945 module instead if iwlwifi is broken for you.
you need to blacklist iwlwifi then.

I tried that but that also didn't work for me.. Network Manager doesn't work with ipw3945 for me.. I tried netcfg, nothing solved.. There were some errors saying that it couldn't connect to wpa_suplicant despite it's installed.. iwlwifi never showed me that error..

A new kernel with the newest iwlwifi would also do fine (maybe)

that will happen with .25 kernel not before

This was reported to Intel by brain0, they said they cannot reproduce this bug. >:(

:( I have HP dv2580et laptop computer with:

07:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)

on it.. The details:

07:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
Subsystem: Hewlett-Packard Company Unknown device 135c
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 19
Region 0: Memory at f4100000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [c8] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
Address: 0000000000000000 Data: 0000
Capabilities: [e0] Express (v1) Legacy Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 128 bytes
DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq+ AuxPwr+ TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <128ns, L1 <64us
ClockPM+ Suprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
Capabilities: [100] Advanced Error Reporting <?>
Capabilities: [140] Device Serial Number 94-e4-c6-ff-ff-77-1b-00

I just downgraded to kernel-2.6.23 in core repository and installed iwlwifi package in extra.. I should try these configuration at home since I have the problem there.. When it disconnects randomly, I can't reconnect for some time.. Sometimes it doesn't even find my wireless router whereas my router is inches away that I can touch it.. Sometimes it list my router but it can't connect to it due to timeouts... :(

The problem is that the iwlwifi version in extra is newer than the one in kernel26. However, the latest version from their website doesn't build against 2.6.24. Complain to Intel about it.

Kernel 2.6.24 includes iwlwifi package inside.. Maybe that is the reason why it doesn't get built ? Of course, I assume that the iwlwifi package just provides the modules iwl3945 and iwl4965.. If so, which version of the iwlwifi package the kernel includes is important..

iwl3945 in 2.6.24.x kernel is very, very old (1.1.17) and not stable for WPA etc.. Stable WPA support is from version 1.2.+ . Please be patient for new kernel 2.6.25, will latest driver version (at moment 1.2.26).

This is transition, and is not without problems.

The kernel driver of iwl3945 is not good :-( I have also big, big problems, i use driver from http://linuxwireless.org/en/users/Download - is latest.

2.6.25 should be there shortly, so I think we should wait for that, it includes a much newer version of the iwl drivers.

That said, I have no problems using iwl3945 now, but I think I only tried WPA2, no WPA.

if i say WPA think of course WPA/WPA2... we can wait, but this is not problem Archlinux, this is driver problem. :-)