Hi

I'm experiencing some weird WiFi problems since the arrival of Kernels
5.x. Currently I run 5.3.0-2-amd64 and MT7612 MediaTek Inc. 802.11ac
WLAN USB3 dongle. I suffer frequent disconects, and everytime this
happens, I see this in the system log:



wpa_supplicant[651]: wlx00e0bb330276:
CTRL-EVENT-STARTED-CHANNEL-SWITCH freq=5540 ht_enabled=1 ch_offset=1
ch_width=80 MHz cf1=5530 cf2=0

wpa_supplicant[651]: wlx00e0bb330276: CTRL-EVENT-CHANNEL-SWITCH
freq=5540 ht_enabled=1 ch_offset=1 ch_width=80 MHz cf1=5530 cf2=0

wlx00e0bb330276: AP a0:64:8f:dc:b1:81 tries to chanswitch to same
channel, ignore

wlx00e0bb330276: AP VHT information is invalid, disable VHT

wlx00e0bb330276: AP a0:64:8f:dc:b1:81 changed bandwidth, new config is
5540 MHz, width 2 (5550/0 MHz)

wlx00e0bb330276: AP a0:64:8f:dc:b1:81 changed bandwidth in a way we
can't support - disconnect

wlx00e0bb330276: failed to follow AP a0:64:8f:dc:b1:81 bandwidth
change, disconnect

wlx00e0bb330276: CTRL-EVENT-DISCONNECTED bssid=a0:64:8f:dc:b1:81
reason=3 locally_generated=1

NetworkManager[642]: <warn>  [1574118371.9594]
sup-iface[0x560817a7a130,wlx00e0bb330276]: connection disconnected
(reason -3)



Different 5 GHz channels but always the same sequence. After
disconnection Network Manager keep asking for the WiFi password
(Network Manager already knows this password) but this is a different
problem...

Other devices connected to the same WiFi router using 802.11ac mode
does not have this problem, only my Debian Sid box.

Any idea on how to solve / fix / track down this problem?
Unfortunately I can't use a wired connection.

Thanks in advance.

Migue A. Vallejo

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