DW-AX1850 very slow wifi after reboot

Meisich · July 17, 2025, 1:41pm

you need USB 3.x for to get AX. With USB 2.x you only get AC and with that only limited speed.

edit:

make a file called “8852au.conf”. Put this line into it

options 8852au rtw_switch_usb_mode=1

save the file and copy it to “etc/modprobe.d”

then plug the AX1850 into an USB 3.x port

restart

there are much more options you can give this adapter. I had it with my old notebook, but cant access it at the moment cause i am not at place. But i made a thread about here on forum

the original 8852au.conf is no more avail on net, but you can also use a 8852bu.conf and replace all the “8852bu.conf” with “8852au.conf” in this file

github.com/morrownr/rtl8852bu-20240418

8852bu.conf

main

# /etc/modprobe.d/8852bu.conf
#
# Purpose: Allow easy access to specific driver options.
#
# Edit the options line below to change, add or delete options if using
# managed (client) mode. If running AP mode, comment this line by adding
# # to beginning of line to inactivate it and see AP mode line further
# down:
#
options 8852bu rtw_switch_usb_mode=0
#
# Note: To activate USB3 mode, change `rtw_switch_usb_mode=0` above to
# `rtw_switch_usb_mode=1`
#
# Edit the options line below to change, add or delete options if using
# AP (hotspot) mode. Uncomment the line by deleting # to activate it and
# don't forget to add # in front of the above options line to deactivate
# it:
#
#options 8852bu rtw_switch_usb_mode=0 rtw_he_enable=2 rtw_vht_enable=2

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have fun