On Thu, Nov 12, 2020 at 03:31:09PM -0500, Morgan Aldridge wrote:
> >Synopsis: Edimax EW-7811Un V2 not detected by urtwn
> >Category: kernel amd64
> >Environment:
> System : OpenBSD 6.8
> Details : OpenBSD 6.8 (GENERIC.MP) #0: Wed Oct 28 10:06:34 MDT
> 2020
>
> [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
>
> Architecture: OpenBSD.amd64
> Machine : amd64
> >Description:
> I purchased an Edimax EW-7811Un USB WiFi adapter after a number of
> suggestions that it is commonly supported by urtwn(4) on OpenBSD, but
> they seem to be shipping new V2 model which is still identified as
> Realtek, but has a new device ID of 0xb811 (instead of 0x7811).
>
> dmesg shows:
>
> ugen2 at uhub1 port 2 "Realtek Edimax N150 Adapter" rev 2.00/0.00
> addr 2
>
> usbdevs shows:
>
> addr 02: 7392:b811 Realtek, Edimax N150 Adapter
> high speed, power 500 mA, config 1, rev 0.00, iSerial
> 08BEAC0EEAA1
> driver: ugen2
>
> fw_update does not fetch the urtwn firmware.
>
> I'm not 100% sure that this is still using the same chipset, but it
> seems like it's at least still using a Realtek chipset, and am
> happy to provide further details or even send the device to a
> developer. I'm tempted to just add the new device ID to usbdevs and
> if_urtwn.c and see if it works, but I don't know what the risks are.
> >How-To-Repeat:
> Plug Edimax EW-7811Un V2 to USB port, run fw_update, dmesg, and
> usbdevs.
> >Fix:
> Maybe we can just add the new device ID to usbdevs & if_urtwn.c, but
> I'm not sure.
It looks like this device is RTL8188EU based (not RTL8188CU like the 7811Un),
since
the linux driver they offer for download is called rtl8188EUS, so you'd add
URTWN_DEV_8188EU(EDIMAX, EW7811UNV2)
to the urtwn device list.
