Intel 7000/8000 IEEE 802.11a/ac/b/g/n wireless network
iwm driver provides support for Intel Wireless 7260,
7265, 3160, 3165, 3168, 8260, and 8265 PCIe Mini Card network adapters.
These are the modes the
iwm driver can
- BSS mode
- Also known as infrastructure mode, this is used when
associating with an access point, through which all traffic passes. This
mode is the default.
- monitor mode
- In this mode the driver is able to receive packets without associating
with an access point. This disables the internal receive filter and
enables the card to capture packets from networks which it wouldn't
normally have access to, or to scan for access points.
iwm driver can be configured to use
Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA-PSK and
WPA2-PSK). WPA is the current encryption standard for wireless networks. It
is strongly recommended that WEP not be used as the sole mechanism to secure
wireless communication, due to serious weaknesses in it. The
iwm driver offloads both encryption and decryption
of unicast data frames to the hardware for the CCMP cipher.
The driver needs one of the following firmware files, which are loaded when an
interface is brought up:
iwm driver can be configured at
runtime with ifconfig(8) or on boot
These firmware files are not free because Intel refuses to grant
distribution rights without contractual obligations. As a result, even
though OpenBSD includes the driver, the firmware
files cannot be included and users have to download these files on their
A prepackaged version of the firmware can be installed using
The following example scans for available networks:
# ifconfig iwm0 scan
hostname.if(5) example configures
iwm0 to join network “mynwid”, using WPA key
“mywpakey”, obtaining an IP address using DHCP:
nwid mynwid wpakey mywpakey
- iwm0: device timeout
- A frame dispatched to the hardware for transmission did not complete in
time. The driver will reset the hardware. This should not happen.
- iwm0: fatal firmware error
- For some reason, the firmware crashed. The driver will reset the hardware.
This should not happen.
- iwm0: radio is disabled by hardware switch
- The radio transmitter is off and thus no packet can go out. The driver
will reset the hardware. Make sure the laptop radio switch is on.
- iwm0: could not read firmware ... (error N)
- For some reason, the driver was unable to read the firmware image from the
filesystem. The file might be missing or corrupted.
- iwm0: firmware too short: N bytes
- The firmware image is corrupted and can't be loaded into the adapter.
- iwm0: could not load firmware
- An attempt to load the firmware into the adapter failed. The driver will
reset the hardware.
iwm device driver first appeared in
iwm driver does not support any of the 802.11ac
capabilities offered by the adapters. Support for 802.11n 40MHz channels and
Tx aggregation is not yet implemented. Additional work is required in
ieee80211(9) before those features can
This driver does not support powersave mode.