Intersil (AMBIT) Prism 2.5, 3872 chipset

Roberto Guida roberto.guida
Wed Mar 21 10:29:17 PDT 2007

Hello everyone,

my lspci -vv output is:
02:05.0 Network controller: Intersil Corporation Prism 2.5 Wavelan
chipset (rev 01)
         Subsystem: AMBIT Microsystem Corp.: Unknown device 0200
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
         Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium
 > TAbort- <TAbort- <MAbort- >SERR- <PERR-
         Latency: 64, cache line size 10
         Interrupt: pin A routed to IRQ 11
         Region 0: Memory at e0500000 (32-bit, prefetchable) [size=4K]
         Capabilities: [dc] Power Management version 2
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-

my lspci -n output is:
02:05.0 Class 0280: 1260:3872 (rev 01)

Do someone know if hostap_pci supports it?

because after I have loaded the driver into the kernel I get,

dmesg | grep wifi0:
hostap_pci: Registered netdevice wifi0
wifi0: Original COR value: 0x0
wifi0: NIC: id=0x8022 v1.0.0
wifi0: PRI: id=0x15 v1.1.1
wifi0: STA: id=0x1f v1.5.6
wifi0: Intersil Prism2.5 PCI: mem=0xe0500000, irq=11
wifi0: registered netdevice wlan0
wifi0: Host AP mode does not support 'Any' essid

Here is the output of dmesg grepped for hostap_pci
dmesg | grep hostap_pci:
hostap_pci: 0.2.6 - 2004-12-25 (Jouni Malinen <jkmaline at>)
hostap_pci: Registered netdevice wifi0

ifconfig gives this output:
wifi0     Link encap:UNSPEC  HWaddr 
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:0 (0.0 b)  TX bytes:468 (468.0 b)
           Interrupt:11 Memory:f8df0000-f8df1000

I notice that the HWaddr is strange, it is not the MAC address of the 
wireless that instead is 00:02:8A:A0:83:D6, but it is much longer!! what 
are that numbers after the right MAC address?

If I try to connect to my router, i get
dhclient wifi0:
Internet Systems Consortium DHCP Client V3.0.3
Copyright 2004-2005 Internet Systems Consortium.
All rights reserved.
For info, please visit
wifi0: unknown hardware address type 801
wifi0: unknown hardware address type 801
(what does it mean?)
Listening on LPF/wifi0/
Sending on   LPF/wifi0/
Sending on   Socket/fallback
DHCPDISCOVER on wifi0 to port 67 interval 3
DHCPDISCOVER on wifi0 to port 67 interval 7
DHCPDISCOVER on wifi0 to port 67 interval 13
DHCPDISCOVER on wifi0 to port 67 interval 20
DHCPDISCOVER on wifi0 to port 67 interval 8
DHCPDISCOVER on wifi0 to port 67 interval 9
DHCPDISCOVER on wifi0 to port 67 interval 1
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
while the router has the DHCP protocol that works for other computers..

I cannot scan for AP, i cannot see any network (i tried with 
kwifimanager), i cannot connect to any router/AP;


iwlist scanning | grep wifi0
wifi0      No scan results

any ideas? my kernel is
uname -a:
Linux myname 2.6.12-18mdk #1 Wed Mar 15 13:15:23 MST 2006 i686 Intel(R) 
Pentium(R) 4 CPU 2.60GHz unknown GNU/Linux


More information about the Hostap mailing list