On Thu, 14 Mar 2024 11:41:22 +0100 Stefan Sperling <s...@stsp.name> wrote:
> On Thu, Mar 14, 2024 at 12:01:40AM -0400, Stefan Moran via misc wrote: > > On Wed, 13 Mar 2024 20:58:12 +0100 > > Stefan Sperling <s...@stsp.name> wrote: > > > > > ... > > > > > > iwm should work just fine. > > > > I don't doubt it. I did some more research on my device (Intel AC > > 7260, should have put it in my original message but I forgot to), > > and it doesn't support MU-MIMO, which the router in the residence > > I'm staying was set to use. > > Interesting. This could be an interop issue, though in general the > AP should be backwards compatible with 11ac MIMO. > > There is a flag you can use to disable the use of MIMO in the driver: > > ifconfig iwm0 nwflag nomimo > > This flag is generally only required if the second antenna is absent > or damaged. Neither the driver nor firmware attempt to detect "dead" > antennas. Apparently, this is too difficult to do reliably. I notice the black antenna wire is very loose no matter how well I connect it, so it could very well be an antenna issue, I could try disconnecting it intentionally and see if my issues are the same to verify. > > > I got the admin to disable this on the router, and it > > seems to be working better. > > And the router is still using regular MIMO now? Yes. > > Plesae run this while associated: > > tcpdump -n -i iwm0 -y IEEE802_11_RADIO -v -s 4096 type mgt subtype > beacon > > And show the following fields: > > htcaps=<...> htop=<...> vhtcaps=<...> vhtop=<...> htcaps=<20/40MHz,LDPC,SGI@20MHz,SGI@40MHz,TXSTBC,RXSTBC 1 stream,A-MSDU 7935,A-MPDU max 65535,A-MPDU spacing 4.00us,RxMCS 0xffff0000000000000000> htop=<40MHz chan 149:153,htprot 20MHz,non-greenfield STA,non-HT STA,basic MCS set 0x0000000000000000> vhtcaps=<max MPDU 7991,80MHz,LDPC,SGI@80MHz,TxSTBC,RxSTBC 1 stream,beamformer STS 1,beamformee STS 3,max A-MPDU 1024K,linkadapt MRQ MFB,RxMCS 0-9@1SS 0-9@2SS,TxMCS 0-9@1SS 0-9@2SS> vhtop=<80MHz chan,center chan 155,basic MCS set 0-7@1SS 0-7@2SS 0-7@3SS 0-7@4SS 0-7@5SS 0-7@6SS 0-7@7SS> > ...
