Surface Pro 7 Slow WiFi

Anonymous
2019-12-28T15:20:10+00:00

Hello everyone,

I am working with my new Surface Pro 7 i5 one or two days now and unfortunately, I still have severe wifi issues after installing all updates. Speed is between 0 and 1,250 kbit/s.

After searching for this issue, I found several entries describing this kind of problem and some workarounds like setting the MIMO Power Safe Mode to a different value. (as described here) I did all this but still, there is no improvement. 

Any other suggestions on this? Is this a known bug? Is there a patch on its way? Is Microsoft working on this?

Any help is greatly appreaciated.

Thanks a lot

Tim

Surface | Surface Pro | Network

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  1. Anonymous
    2020-03-06T17:01:25+00:00

    Hope it works, it did for me so fingers crossed :)

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  2. Anonymous
    2020-03-06T16:54:47+00:00

    So far so good with "smps=static"

    I'll update if the problem reappears today, but first thing this morning I still had good bandwidth. 

    Thanks very much Ssssh.

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  3. Anonymous
    2020-03-06T07:22:50+00:00

    Actually I tried "no smps". Just tried "static" and got the usual immediate bump to full speed. Going to bed now but I'll check again in the morning. fingers crossed.

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  4. Anonymous
    2020-03-06T07:19:46+00:00

    Yes, I reloaded the driver and changed the SMPS setting. Like every other time I touch something I got an immediate increase back to top speed and ten minutes (guess) later it was back down to 20-ish.   It's very frustrating, I keep thinking "Ah, that's done it", and a short while later I'm back to square one.

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  5. Anonymous
    2020-03-06T07:16:03+00:00

    The new Intel AX201 adapter has 2×2 MIMO (twice the number of antennas for 2 times the WLAN speed if the router supports it). If the Surface device goes into standby mode, the Dynamic SMPS feature deactivates one antenna and the other antenna goes into low power mode. The error, however, is that after waking the device from standby mode, the second antenna is no longer activated and the other antenna remains in low power mode. This results in greatly reduced speeds and higher latency. 

    1. Go to the hardware manager -> network adapter -> Intel AX201 -> Advanced -> MIMO power save mode -> Change “Auto SMPS” to “No SMPS”. While this resulted in the bug occurring less frequently, only changing the setting to “Static SMPS” (-> disabling MIMO) eliminated the problem entirely for me.
    2. (Optional) Go to the Windows Settings App -> System -> Power & Sleep -> When my PC is asleep and on battery power, disconnect from network -> Change “Never” to “Always”

    In the workaround, Auto SMPS is disabled for the WLAN adapter, turning off the power saving. This results in higher power consumption, but prevents the speed drop. The second workaround is from the Settings page, where the network connection settings are adjusted.

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