5 GHz band support for Intel WiFi chips?

[Jarle Greipsland <jarle%uninett.no@localhost>]

Hi,

my impression from various web sites is that the Intel WiFi
device in my Lenovo T400s laptop has support for the 5 GHz band
channels.  However, it seems to never associate with any access
points using such channels.  It always ends up using some of the
2.4 GHz channels instead, or not being able to associate with any
access point at all.

It identifies itself as:
iwn0 at pci2 dev 0 function 0: vendor 0x8086 product 0x4236 (rev. 0x00)
iwn0: interrupting at ioapic0 pin 17
iwn0: MIMO 3T3R, MoW, address xx:xx:xx:xx:xx:xx
iwn0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
iwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
iwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 
36Mbps 48Mbps 54Mbps

Does the NetBSD 80211 framework have support for the 5 GHz
channels?  Does our driver for this Intel series of chips support
the 5 GHz channels?  Do I need to configure the device in any
particular way?  Or have I misunderstood something, and the chip
in question does not support the 5 GHz band channels after all?

Is there anybody, with a similar device, that has successfully
used the 5 GHz band channels?

                                        -jarle
-- 
There are only two hard things in Computer Science: cache invalidation,
naming things, and off-by-one errors.