Edimax EW-7822UMX (802.11ax USB) 7392:6822
openMolNike opened this issue · comments
Hi. Sorry for my bad english.
I have bought Edimax EW-7822UMX (802.11ax USB adapter) because I want Wi-fi 6 speed.
It works on windows (my speed is 70-90 Mbytes/s) and should work on linux with old kernels.
Here are old drivers:
https://www.edimax.com/edimax/download/download/data/edimax/global/download/wireless_adapter_ax1800/ew-7822umx
Need kernel before 5.11 =( Can't downgrade my linux without reinstall =(
lsusb output:
Bus 003 Device 002: ID 7392:6822 Edimax Technology Co., Ltd 802.11ax WLAN Adapter
I've searched "7392:6822" of that driver and found here
https://deviceinbox.com/drivers/2025-realtek-wifi-driver-5001-0-15-110.html
So I think it has 8832BU or 8852BU chipset
I'm not a developer but I maked it work by this driver. I just tried to edit it for luck.
I've edited this files to make this device visible for your driver:
1)usb_intf.c
#define USB_VENDER_ID_EDIMAX 0x7392
{USB_DEVICE_AND_INTERFACE_INFO(USB_VENDER_ID_EDIMAX, 0x6822, 0xff, 0xff, 0xff), .driver_info = RTL8852B},
2)8852bu.mod.c - looks like this file is generated during compilation and shouldn't be edited manually, but I did it
MODULE_ALIAS("usb:v7392p6822ddcdscdpicFFiscFFipFFin*");
And it works!! But it works too slow (20 Mbytes/s). Much slower then same device on windows (80 Mbytes/s).
There is no point in using it like this. My old wifi-5 adapter is faster(38 Mbytes/s).
What else I can do?
I tried also:
- RTL8852BP and RTL8832BR instead of RTL8852B - not working
- turning off the built-in module to eliminate interference - no effect on speed
sudo ip link set wlo1 down
I checked original source code of official drivers. They look similar to this.
files "usb_intf.c" can be compared via https://www.diffchecker.com/text-compare/
What if this device works as usb 2.0 speed?
Ok... I I bought another adapter "TP-LINK Archer TX20UH"
This apadter works with this https://github.com/lwfinger/rtl8852au without any addtionas changes.
But same problem! 20-23 Mbytes/s
What the hell? Are this drivers un-finished or I have problems with USB port?
Windows and Linux are installed on different PCs but router is same.
I do not have an rtw8852bu, but I have an rtw8852cu. With it, connecting to a wifi6 router over a 5 GHz connection, I got roughly 350 Mbps (44 MBps) rates using a local LibreSpeed server.
These drivers are the ones the vendor provides for internal testing, but are released. hey are far from polished.
The rtw89 drivers in the kernel have the hooks for USB drivers, but no one has yet written them. On PCIe interfaces, those devices get about 750 Mbps.
At this point, there is not much more that I can offer. The devicees could go faster, but not with the current drivers.
It's very sad
I think it’s worth indicating in the driver description that with them the speed will be less than in Windows.
Anyway, you can add Edimax EW-7822UMX id to supported list