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Slow connection with rtl8xxxu and 8192eu chipset

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(Please CC as I'm not subscribed)

Hello,

I have the tp-link tl-wn822N usb wifi dongle. lsbusb reports it as

Bus 001 Device 003: ID 2357:0108

Unfortunately with the in-kernel rtl8xxxu driver I don't get very good
results:

wifi1     IEEE 802.11  ESSID:"HOME"
          Mode:Managed  Frequency:2.462 GHz  Access Point:
30:B5:C2:75:A4:CD
          Bit Rate=1 Mb/s   Tx-Power=20 dBm
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          Link Quality=26/70  Signal level=-84 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:165   Missed beacon:0


At the same time if I use an out of tree driver acquired from github:
https://github.com/Mange/rtl8192eu-linux-driver I get the following:

wifi1     IEEE 802.11bgn  ESSID:"HOME"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.462 GHz  Access Point:
30:B5:C2:75:A4:CD
          Bit Rate:144.4 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=81/100  Signal level=100/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

Clearly this is a software problem of the in-kernel driver. I'm using
v4.10.17 with commit c14239f23adb ("rtl8xxxu: Add another 8192eu device
to the USB list") so that my device is recognised. Latest commit for
that driver in my kernel is: c59f13bbead4 ("rtl8xxxu: Work around issue
with 8192eu and 8723bu devices not reconnecting").

Any ideas what I can do to further debug this, I'd really like to use
the in-kernel driver ?





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