Re: Wifi RTL8723bu driver test: failed to scan

[Mylene JOSSERAND]

Hello Jes,

Le Tue, 28 Nov 2017 11:14:10 -0500,
Jes Sorensen  a écrit :

> On 11/22/2017 04:51 AM, Mylene JOSSERAND wrote:
> > Hello Jes Sorensen,
> > 
> > I am currently testing a LM811 Wifi/BT USB dongle [1] on a Sinlinx
> > SinA33 Allwinner SoC board [2]. I saw that I should use the realtek
> > driver RTL8723BU for this USB dongle.
> > 
> > Currently, I am only testing the Wifi and the mainline driver (kernel
> > 4.14-rc7) does not seem to work. At least, the scanning does not output
> > anything.
> > 
> > I tested the driver recommended by LM Technologies [3] and it works
> > fine (scan, connect and ping are ok). Before investigating on the
> > differences between these two drivers, do you have any idea about this
> > issue?
> > 
> > Here are the commands and output I got with mainline's driver:  
> 
> I have not looked at the driver these LM Technologies people are
> referring to, but I am guessing it's the vendor code.
> 
> 8723bu is a little dicey because it has BT in the chip and if you enable
> that the two drivers need to interact, which rtl8xxxu currently doesn't
> know about. Check your dmesg output to make sure you don't have some BT
> thing loaded hijacking the chip.

I finally tested it again without any BT stuff enabled and I am still
not having any output on scanning.

I added DEBUG support to have all dev_dbg outputs for rtl8xxxu (core
and 8723b). Here is the log of boot and different iw commands:

http://code.bulix.org/56345t-242970?raw

Do you have any idea/hint to give me?
I checked the firmware: I am using the last one from linux-firmware's
repository. Have you already tried this chip? With which firmware?

Thank you very much for any help.

Best regards,

-- 
Mylène Josserand, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: Wifi RTL8723bu driver test: failed to scan

[Mylene JOSSERAND]

Hello,

Le Tue, 28 Nov 2017 11:14:10 -0500,
Jes Sorensen  a écrit :

> On 11/22/2017 04:51 AM, Mylene JOSSERAND wrote:
> > Hello Jes Sorensen,
> > 
> > I am currently testing a LM811 Wifi/BT USB dongle [1] on a Sinlinx
> > SinA33 Allwinner SoC board [2]. I saw that I should use the realtek
> > driver RTL8723BU for this USB dongle.
> > 
> > Currently, I am only testing the Wifi and the mainline driver
> > (kernel 4.14-rc7) does not seem to work. At least, the scanning
> > does not output anything.
> > 
> > I tested the driver recommended by LM Technologies [3] and it works
> > fine (scan, connect and ping are ok). Before investigating on the
> > differences between these two drivers, do you have any idea about
> > this issue?
> > 
> > Here are the commands and output I got with mainline's driver:  
> 
> I have not looked at the driver these LM Technologies people are
> referring to, but I am guessing it's the vendor code.

Yes, it is.

> 
> 8723bu is a little dicey because it has BT in the chip and if you
> enable that the two drivers need to interact, which rtl8xxxu
> currently doesn't know about. Check your dmesg output to make sure
> you don't have some BT thing loaded hijacking the chip.

Okay, I was also testing the BT so maybe, it was the case. I will
have a try without any BT drivers.

Anyway, thank you for your help!

Best regards,

-- 
Mylène Josserand, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: Wifi RTL8723bu driver test: failed to scan

[Jes Sorensen]

On 11/22/2017 04:51 AM, Mylene JOSSERAND wrote:
> Hello Jes Sorensen,
> 
> I am currently testing a LM811 Wifi/BT USB dongle [1] on a Sinlinx
> SinA33 Allwinner SoC board [2]. I saw that I should use the realtek
> driver RTL8723BU for this USB dongle.
> 
> Currently, I am only testing the Wifi and the mainline driver (kernel
> 4.14-rc7) does not seem to work. At least, the scanning does not output
> anything.
> 
> I tested the driver recommended by LM Technologies [3] and it works
> fine (scan, connect and ping are ok). Before investigating on the
> differences between these two drivers, do you have any idea about this
> issue?
> 
> Here are the commands and output I got with mainline's driver:

I have not looked at the driver these LM Technologies people are
referring to, but I am guessing it's the vendor code.

8723bu is a little dicey because it has BT in the chip and if you enable
that the two drivers need to interact, which rtl8xxxu currently doesn't
know about. Check your dmesg output to make sure you don't have some BT
thing loaded hijacking the chip.

Jes