netdev - Re: Realtek r8822be kernel module does not negotiate 802.11ac connection

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Message-ID: <27e1a339-023a-360b-1e5d-1a156fc5edd2@gmail.com>
Date:   Fri, 1 Mar 2019 22:52:41 -0500
From:   "David R. Bergstein" <david.r.bergstein@...il.com>
To:     Larry Finger <Larry.Finger@...inger.net>,
        Tony Chuang <yhchuang@...ltek.com>
Cc:     Pkshih <pkshih@...ltek.com>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Realtek r8822be kernel module does not negotiate 802.11ac
 connection

Larry,

Sorry about all these extra replies.  Shortly after I sent my last
message my access point started recognizing the connection as 802.11ac
with PHY Rate / Modulation Rate of 866.6 Mbps.  What is somewhat
misleading is the information reported by iwconfig (see bit rate below).

$ iwconfig wlo1
wlo1      IEEE 802.11  ESSID:"XXXXXXXXXX-5G" 
          Mode:Managed  Frequency:5.22 GHz  Access Point:
xx:xx:xx:xx:xx:xx  
          Bit Rate=6.5 Mb/s   Tx-Power=23 dBm  
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-40 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:11   Missed beacon:0

Sincerely,

David R. Bergstein

On 3/1/19 10:16 PM, David R. Bergstein wrote:
> Larry,
>
> Please disregard my last message.  The firmware is now installed and the
> rtw88 module is working with my wireless router.  The next hurdle
> appears to be setting the speed to 802.11ac as it is currently
> connecting as an 802.11n client.
>
> Sincerely,
>
> David R. Bergstein
>
> On 3/1/19 9:55 PM, David R. Bergstein wrote:
>> Larry,
>>
>> Following up to your last reply, I blacklisted the r8822be module,
>> rebooted and was unable to bring up the wireless interface via rtw88. 
>> Below are some errors recorded in my system log:
>>
>>  
>> [  267.509818] rtw_pci 0000:3d:00.0: Direct firmware load for
>> rtw88/rtw8822b_fw.bin failed with error -2
>> [  267.509821] rtw_pci 0000:3d:00.0: failed to request firmware
>> [  267.511068] rtw_pci 0000:3d:00.0: mac power on failed
>> [  267.511072] rtw_pci 0000:3d:00.0: failed to power on mac
>> [  267.511073] rtw_pci 0000:3d:00.0: failed to setup chip efuse info
>> [  267.511075] rtw_pci 0000:3d:00.0: failed to setup chip information
>> [  267.512817] rtw_pci: probe of 0000:3d:00.0 failed with error -114
>>
>> As directed, I used the rtwpci module to perform load/unload the rtw88
>> module before I saw the errors above.  Do I still need to install firmware?
>>
>> Sincerely,
>>
>> David R. Bergstein
>>
>> On 3/1/19 8:46 PM, Larry Finger wrote:
>>> On 3/1/19 4:26 PM, David R. Bergstein wrote:
>>>> Larry,
>>>>
>>>> Thanks for the response and detailed instructions, which allowed me to
>>>> build and install the rtw88 kernel module.  I cannot however seem to get
>>>> my system to actually use the module.  Just to recap this is an HP Omen
>>>> laptop with secure boot disabled.  Upon boot-up both the new rtw88 and
>>>> old r8822be modules are loaded.  If I unload the r8822be module the wifi
>>>> network connection gets terminated, even if I unload/reload the rtw88
>>>> module.
>>>>
>>>> Is there something else I should be doing prior to invoking rtw88, e.g.,
>>>> blacklisting the old module?
>>> Yes, r8822be must be blacklisted. Use the lsmod command to see what
>>> modules are actually loaded. You load/unload rtw88 using the rtwpci
>>> module.
>>>
>>> Larry
>>>