[fedora-arm] RPI3 and kind of issue with 8812 Realtek USB dongle

[Tomasz Kłoczko]

Hi,

I've received today ordered
https://www.aliexpress.com/item/Wireless-USB-Adapter-1200mbps-Dual-Band-5Ghz-2-4Ghz-Adapter-802-11ac-RTL8812AU-Chipset-Aerial-Dongle/32826805092.html
I'v ordered this dongle not to have higher bandwidth over wifi but to
be able to use
802.11ac channels.
Generally dongle is working however when I'm trying to use it with
RPi3 using lsusb I see it as:

Bus 001 Device 009: ID 0bda:8176 Realtek Semiconductor Corp.
RTL8188CUS 802.11n WLAN Adapter

However when I'm trying to use it with x86 laptop I see it as:

Bus 003 Device 099: ID 0bda:8812 Realtek Semiconductor Corp. RTL8812AU
802.11a/b/g/n/ac 2T2R DB WLAN Adapter

Of course when I'm trying to use it with RPi3 I'm not able to even
scan 802.11ac channels.

Any comments or hints why under the same kernel version (in both cases
I'm using up-to-date rawhide) on RPi3 this dongle is not detected as
8812 Realtek device?

kloczek
--
Tomasz Kłoczko | LinkedIn: http://lnkd.in/FXPWxH
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[Tomasz Kłoczko]

On 7 November 2017 at 18:40, Tomasz Kłoczko <***@gmail.com> wrote:
[..]

Post by Tomasz Kłoczko
Generally dongle is working however when I'm trying to use it with
Bus 001 Device 009: ID 0bda:8176 Realtek Semiconductor Corp.
RTL8188CUS 802.11n WLAN Adapter

I must apologize. I had plugged in in one end of the usb hub tiny wifi
dongle which was responsible for this line.

Now on plug in this this new 802.11ac dongle in dmesg I see only:

[***@rpi3 ~]# dmesg
[ 168.367092] usb 1-1.4: new full-speed USB device number 13 using dwc2
[ 168.451090] usb 1-1.4: device descriptor read/64, error -32
[ 168.636097] usb 1-1.4: device descriptor read/64, error -32
[ 168.827104] usb 1-1.4: new full-speed USB device number 14 using dwc2
[ 168.911099] usb 1-1.4: device descriptor read/64, error -32
[ 169.100106] usb 1-1.4: device descriptor read/64, error -32
[ 169.291105] usb 1-1.4: new full-speed USB device number 15 using dwc2
[ 169.711119] usb 1-1.4: device not accepting address 15, error -32
[ 169.794122] usb 1-1.4: new full-speed USB device number 16 using dwc2
[ 170.215120] usb 1-1.4: device not accepting address 16, error -32
[ 170.221952] usb 1-1-port4: unable to enumerate USB device

So situation is a bit different. Dongle:

Bus 003 Device 099: ID 0bda:8812 Realtek Semiconductor Corp. RTL8812AU
802.11a/b/g/n/ac 2T2R DB WLAN Adapter

is not correctly initialized/detected.

kloczek

[Peter Robinson]

Post by Tomasz Kłoczko
Hi,
I've received today ordered
https://www.aliexpress.com/item/Wireless-USB-Adapter-1200mbps-Dual-Band-5Ghz-2-4Ghz-Adapter-802-11ac-RTL8812AU-Chipset-Aerial-Dongle/32826805092.html
I'v ordered this dongle not to have higher bandwidth over wifi but to
be able to use
802.11ac channels.
Generally dongle is working however when I'm trying to use it with
Bus 001 Device 009: ID 0bda:8176 Realtek Semiconductor Corp.
RTL8188CUS 802.11n WLAN Adapter
Bus 003 Device 099: ID 0bda:8812 Realtek Semiconductor Corp. RTL8812AU
802.11a/b/g/n/ac 2T2R DB WLAN Adapter
Of course when I'm trying to use it with RPi3 I'm not able to even
scan 802.11ac channels.
Any comments or hints why under the same kernel version (in both cases
I'm using up-to-date rawhide) on RPi3 this dongle is not detected as
8812 Realtek device?

I wonder if it presents itself differently if it's plugged into a usb3
port, which I suspect is what it's plugged into on an x86 laptop, vs a
usb2 port which you get on the RPi3. The usb2 port would run at a max
of 480Mb (rpi will give a lot less than that), where as the device
advertises 1200 odd. What happens if you plug it into a non usb3, or
plug it into a usb2 hub on the x86 device.
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[Tomasz Kłoczko]

On 7 November 2017 at 19:09, Peter Robinson <***@gmail.com> wrote:
[..]

Post by Peter Robinson

Post by Tomasz Kłoczko
Any comments or hints why under the same kernel version (in both cases
I'm using up-to-date rawhide) on RPi3 this dongle is not detected as
8812 Realtek device?

I wonder if it presents itself differently if it's plugged into a usb3
port, which I suspect is what it's plugged into on an x86 laptop, vs a
usb2 port which you get on the RPi3. The usb2 port would run at a max
of 480Mb (rpi will give a lot less than that), where as the device
advertises 1200 odd. What happens if you plug it into a non usb3, or
plug it into a usb2 hub on the x86 device.

On x86 I've been tryig to plug in this dongle to laptop usb2 port and
usb3 ports of usb3 hub which is connected to laptop usb3 port.
In both cases usb dongle is correctly recognized and initialized.

A I wrote in my second email I had plugged other wifi dongle (my fault).
So now situation is different that this 802.11ac dongle is not
correctly initialized.

kloczek
--
Tomasz Kłoczko | LinkedIn: http://lnkd.in/FXPWxH
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