I have a Intel Corporation Wireless 8260 (rev 3a) in my laptop, and at one point in time I was able to achieve 866.7 MBit/s tx/rx with it. I don't know what changed, but now, I am only getting 433.3 MBit/s maximum receive, and I know that this is happening because I'm only achieving VHT-NSS 1 with my connection:
$ iw dev wlp4s0 link
Connected to <censored> (on wlp4s0)
SSID: <censored>
freq: 5745.0
RX: 108897 bytes (393 packets)
TX: 41220 bytes (304 packets)
signal: -51 dBm
rx bitrate: 390.0 MBit/s VHT-MCS 8 80MHz short GI VHT-NSS 1
tx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2
bss flags: short-slot-time
dtim period: 3
beacon int: 100My AP is fully capable of doing 2x2 MIMO, and it even thinks that I'm on a 2x2 connection. However, my 8260 only connects with a 1x2 connection, and cannot achieve 866.7 MBit/s. Like mentioned, this has worked in the past. I don't know what changed, or why it's only doing one channel.
It's not a power saving setting:
$ iw dev wlp4s0 get power_save
Power save: offdmesg seems happy:
[46932.471735] wlp4s0: authenticate with <censored> (local address=<censored>)
[46932.473684] wlp4s0: send auth to <censored> (try 1/3)
[46932.518943] wlp4s0: authenticate with <censored> (local address=<censored>)
[46932.518960] wlp4s0: send auth to <censored> (try 1/3)
[46932.535745] wlp4s0: authenticated
[46932.537548] wlp4s0: associate with <censored> (try 1/3)
[46932.552901] wlp4s0: RX AssocResp from <censored> (capab=0x1111 status=0 aid=1)
[46932.556201] wlp4s0: associated
[46932.587317] wlp4s0: Limiting TX power to 30 (30 - 0) dBm as advertised by <censored>I don't really know what to tweak or check. What would you do?
Last edited by synthead (Today 00:40:55)
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