Problem WiFi AC1200 RTL88x2bu

angryfrog · 2021-05-11 17:03:24

Hi,

I just bought a BrosTrend AC1200 AC3L V2, it uses a RealTek RTL88x2bu chipset. The key is detected by lsusb, but doesn't appear anywhere in NetworkManager.
I have try to install the package rtl88x2bu-dkms-git (https://aur.archlinux.org/packages/rtl88x2bu-dkms-git) but it doesn't change anything.
I, of course, use the latest stable kernel.

Does someone have an idea? I'm a complete noob when it come to WiFi.

Thanks you a lot!

teckk · 2021-05-11 17:30:11

Output of:

lspci -k
ip a
ip n

Also look at dmesg and journalctl

What network manager are you using? What does it's config file look like?
https://wiki.archlinux.org/title/Network_configuration

cmm11 · 2021-05-11 17:40:52

I'm using that AUR with a TP-Link Archer T3U + LTS kernel with no issues. Using iwd and systemd-networkd.
It could be possible it doesn't work with 5.12 kernel hence the github page saying "Support Kernel: 2.6.24 ~ 5.11 (with unofficial patches)"
Apart from the commands teckk posted, i would also check the module gets loaded with: lsmod | grep 88x2bu

angryfrog · 2021-05-11 17:42:16

Thanks you a lot!
I'm not very good with forums sorry, I will post the output of lspci -k :

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller (rev 09)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: ivb_uncore
Kernel modules: ie31200_edac
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
Kernel driver in use: pcieport
00:01.1 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
Kernel driver in use: pcieport
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:16.0 Communication controller: Intel Corporation 7 Series/C216 Chipset Family MEI Controller #1 (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1a.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #2 (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 7 Series/C216 Chipset Family High Definition Audio Controller (rev 04)
Subsystem: ASRock Incorporation Z77 Extreme4 motherboard
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 1 (rev c4)
Kernel driver in use: pcieport
00:1c.6 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 7 (rev c4)
Kernel driver in use: pcieport
00:1c.7 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 8 (rev c4)
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #1 (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation Z77 Express Chipset LPC Controller (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich
00:1f.2 SATA controller: Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 7 Series/C216 Chipset Family SMBus Controller (rev 04)
Subsystem: ASRock Incorporation Motherboard
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev e7)
Subsystem: Sapphire Technology Limited Nitro+ Radeon RX 570/580/590
Kernel driver in use: amdgpu
Kernel modules: amdgpu
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]
Subsystem: Sapphire Technology Limited Device aaf0
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev e7)
Subsystem: Sapphire Technology Limited Nitro+ Radeon RX 570/580/590
Kernel driver in use: amdgpu
Kernel modules: amdgpu
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]
Subsystem: Sapphire Technology Limited Device aaf0
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
04:00.0 USB controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
Subsystem: ASRock Incorporation Device 7023
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
05:00.0 PCI bridge: PLX Technology, Inc. PEX 8605 PCI Express 4-port Gen2 Switch (rev aa)
Kernel driver in use: pcieport
06:01.0 PCI bridge: PLX Technology, Inc. PEX 8605 PCI Express 4-port Gen2 Switch (rev aa)
Kernel driver in use: pcieport
06:02.0 PCI bridge: PLX Technology, Inc. PEX 8605 PCI Express 4-port Gen2 Switch (rev aa)
Kernel driver in use: pcieport
06:03.0 PCI bridge: PLX Technology, Inc. PEX 8605 PCI Express 4-port Gen2 Switch (rev aa)
Kernel driver in use: pcieport
09:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 03)

The output of ip a :

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: enp0s20u3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
link/ether 62:5e:f1:57:cf:c6 brd ff:ff:ff:ff:ff:ff
inet 192.168.42.157/24 brd 192.168.42.255 scope global dynamic noprefixroute enp0s20u3
valid_lft 3128sec preferred_lft 3128sec

And the output of ip n

192.168.42.129 dev enp0s20u3 lladdr 42:a4:23:99:db:de REACHABLE

enp0s20u3 is actually my phone that I use as a tethering device.
Thanks for your help!

V1del · 2021-05-11 19:24:18

Please use code instead of quote tags for output.

There's no wifi device here, did you load the module after building? Did the module build properly? Are the linux-headers for your used kernel installed? If you did all of these check dmesg on why it fails to allocate an interface.

progandy · 2021-05-11 19:47:04

angryfrog wrote:

I just bought a BrosTrend AC1200 AC3L V2, it uses a RealTek RTL88x2bu chipset. The key is detected by lsusb,

It is a USB device, not PCI, so lspci won't show anything.

angryfog on AUR/rtl88x2bu-dkms-git wrote:

Hi,
I just bought a BrosTrend AC1200 AC3L V2, it uses a RealTek RTL88x2bu chipset. The key is detected by lsusb (Bus 003 Device 002: ID 0bda:b812 Realtek Semiconductor Corp. RTL88x2bu [AC1200 Techkey]), but doesn't appear anywhere in NetworkManager. I have try to install the package rtl88x2bu-dkms-git but it doesn't change anything. I, of course, use the latest stable kernel.
Does someone have an idea? I'm a complete noob when it come to WiFi.
Thanks you a lot!

So the device is 0bda:b812

Is the dkms package installed correctly? For the linux kernel you have to install the linux-header package as well, that does not happen automatically. https://wiki.archlinux.org/title/Dynami … le_Support

modinfo 88x2bu

Last edited by progandy (2021-05-11 19:56:00)

angryfrog · 2021-05-12 06:52:38

Thanks you a lot for your answers!

@V1del
I just installed the aur package and rebooted, yes it build properly but it says

 Good news! Module version v5.8.7.2_36899.20200819_COEX20191120-7777 for 88x2bu.ko.xz
exactly matches what is already found in kernel 5.12.2-1-ck-ivybridge.
DKMS will not replace this module.

And yes, headers for my kernel are installed. I have checked dmesg, but haven't found anything relevant. I can post the total output if you want.

----

@progandy
As I said, when I install the aur package, it told me the module is already found in the kernel. I have tried to type

 sudo dkms install --no-depmod -m rtl88x2bu -v 5.8.7.1.r119.2ed61f8 -k 5.12.2-1-ck-ivybridge --force

but it told me that

 Module rtl88x2bu/5.8.7.1.r119.2ed61f8 already installed on kernel 5.12.2-1-ck-ivybridge/x86_64

modinfo give me that :

 
filename:       /lib/modules/5.12.2-1-ck-ivybridge/kernel/drivers/net/wireless/88x2bu.ko.xz
version:        v5.8.7.2_36899.20200819_COEX20191120-7777
author:         Realtek Semiconductor Corp.
description:    Realtek Wireless Lan Driver
license:        GPL
srcversion:     DD41C089A1598A9FE049B60
alias:          usb:v20F4p808Ad*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v2357p0115d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v2357p0138d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v2357p012Dd*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0846p9055d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v2001p331Cd*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v2001p331Ed*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v7392pC822d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v7392pB822d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0B05p184Cd*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0B05p1841d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v13B1p0043d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApB812d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApB82Cd*dc*dsc*dp*icFFiscFFipFFin*
depends:        cfg80211
retpoline:      Y
name:           88x2bu
vermagic:       5.12.2-1-ck-ivybridge SMP preempt mod_unload 
parm:           rtw_wireless_mode:int
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           rtw_lps_level:The default LPS level (int)
parm:           rtw_lps_chk_by_tp:int
parm:           rtw_max_bss_cnt:int
parm:           rtw_usb_rxagg_mode:int
parm:           rtw_dynamic_agg_enable:int
parm:           rtw_drv_log_level:set log level when insert driver module, default log level is _DRV_INFO_ = 4 (uint)
parm:           rtw_tx_aclt_flags:device TX AC queue packet lifetime control flags (uint)
parm:           rtw_tx_aclt_conf_default:device TX AC queue lifetime config for default status (array of uint)
parm:           rtw_tx_aclt_conf_ap_m2u:device TX AC queue lifetime config for AP mode M2U status (array of uint)
parm:           rtw_tx_bw_mode:The max tx bw for 2.4G and 5G. format is the same as rtw_bw_mode (uint)
parm:           rtw_rx_ampdu_sz_limit_1ss:RX AMPDU size limit for 1SS link of each BW, 0xFF: no limitation (array of uint)
parm:           rtw_rx_ampdu_sz_limit_2ss:RX AMPDU size limit for 2SS link of each BW, 0xFF: no limitation (array of uint)
parm:           rtw_rx_ampdu_sz_limit_3ss:RX AMPDU size limit for 3SS link of each BW, 0xFF: no limitation (array of uint)
parm:           rtw_rx_ampdu_sz_limit_4ss:RX AMPDU size limit for 4SS link of each BW, 0xFF: no limitation (array of uint)
parm:           rtw_vht_enable:int
parm:           rtw_vht_rx_mcs_map:VHT RX MCS map (uint)
parm:           rtw_rf_path:int
parm:           rtw_tx_nss:int
parm:           rtw_rx_nss:int
parm:           rtw_country_code:The default country code (in alpha2) (charp)
parm:           rtw_channel_plan:The default chplan ID when rtw_alpha2 is not specified or valid (int)
parm:           rtw_excl_chs:exclusive channel array (array of uint)
parm:           rtw_btcoex_enable:BT co-existence on/off, 0:off, 1:on, 2:by efuse (int)
parm:           rtw_ant_num:Antenna number setting, 0:by efuse (int)
parm:           rtw_pci_dynamic_aspm_linkctrl:int
parm:           rtw_qos_opt_enable:int
parm:           ifname:The default name to allocate for first interface (charp)
parm:           if2name:The default name to allocate for second interface (charp)
parm:           rtw_wowlan_sta_mix_mode:int
parm:           rtw_pwrtrim_enable:int
parm:           rtw_initmac:charp
parm:           rtw_chip_version:int
parm:           rtw_rfintfs:int
parm:           rtw_lbkmode:int
parm:           rtw_network_mode:int
parm:           rtw_channel:int
parm:           rtw_mp_mode:int
parm:           rtw_wmm_enable:int
parm:           rtw_uapsd_max_sp:int
parm:           rtw_uapsd_ac_enable:int
parm:           rtw_wmm_smart_ps:int
parm:           rtw_vrtl_carrier_sense:int
parm:           rtw_vcs_type:int
parm:           rtw_busy_thresh:int
parm:           rtw_ht_enable:int
parm:           rtw_bw_mode:int
parm:           rtw_ampdu_enable:int
parm:           rtw_rx_stbc:int
parm:           rtw_rx_ampdu_amsdu:int
parm:           rtw_tx_ampdu_amsdu:int
parm:           rtw_beamform_cap:int
parm:           rtw_lowrate_two_xmit:int
parm:           rtw_power_mgnt:int
parm:           rtw_smart_ps:int
parm:           rtw_low_power:int
parm:           rtw_wifi_spec:int
parm:           rtw_full_ch_in_p2p_handshake:int
parm:           rtw_antdiv_cfg:int
parm:           rtw_antdiv_type:int
parm:           rtw_drv_ant_band_switch:int
parm:           rtw_single_ant_path:int
parm:           rtw_switch_usb_mode:int
parm:           rtw_enusbss:int
parm:           rtw_hwpdn_mode:int
parm:           rtw_hwpwrp_detect:int
parm:           rtw_hw_wps_pbc:int
parm:           rtw_check_hw_status:int
parm:           rtw_max_roaming_times:The max roaming times to try (uint)
parm:           rtw_mc2u_disable:int
parm:           rtw_advnace_ota:int
parm:           rtw_notch_filter:0:Disable, 1:Enable, 2:Enable only for P2P (uint)
parm:           rtw_hiq_filter:0:allow all, 1:allow special, 2:deny all (uint)
parm:           rtw_adaptivity_en:0:disable, 1:enable (uint)
parm:           rtw_adaptivity_mode:0:normal, 1:carrier sense (uint)
parm:           rtw_adaptivity_th_l2h_ini:th_l2h_ini for Adaptivity (int)
parm:           rtw_adaptivity_th_edcca_hl_diff:th_edcca_hl_diff for Adaptivity (int)
parm:           rtw_dfs_region_domain:0:UNKNOWN, 1:FCC, 2:MKK, 3:ETSI (uint)
parm:           rtw_amplifier_type_2g:BIT3:2G ext-PA, BIT4:2G ext-LNA (uint)
parm:           rtw_amplifier_type_5g:BIT6:5G ext-PA, BIT7:5G ext-LNA (uint)
parm:           rtw_RFE_type:default init value:64 (uint)
parm:           rtw_powertracking_type:default init value:64 (uint)
parm:           rtw_GLNA_type:default init value:0 (uint)
parm:           rtw_TxBBSwing_2G:default init value:0xFF (uint)
parm:           rtw_TxBBSwing_5G:default init value:0xFF (uint)
parm:           rtw_OffEfuseMask:default open Efuse Mask value:0 (uint)
parm:           rtw_FileMaskEfuse:default drv Mask Efuse value:0 (uint)
parm:           rtw_rxgain_offset_2g:default RF Gain 2G Offset value:0 (uint)
parm:           rtw_rxgain_offset_5gl:default RF Gain 5GL Offset value:0 (uint)
parm:           rtw_rxgain_offset_5gh:uint
parm:           rtw_rxgain_offset_5gm:default RF Gain 5GM Offset value:0 (uint)
parm:           rtw_pll_ref_clk_sel:force pll_ref_clk_sel, 0xF:use autoload value (uint)
parm:           rtw_tx_pwr_by_rate:0:Disable, 1:Enable, 2: Depend on efuse (int)
parm:           rtw_tx_pwr_lmt_enable:0:Disable, 1:Enable, 2: Depend on efuse (int)
parm:           rtw_target_tx_pwr_2g_a:2.4G target tx power (unit:dBm) of RF path A for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_2g_b:2.4G target tx power (unit:dBm) of RF path B for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_2g_c:2.4G target tx power (unit:dBm) of RF path C for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_2g_d:2.4G target tx power (unit:dBm) of RF path D for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_5g_a:5G target tx power (unit:dBm) of RF path A for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_5g_b:5G target tx power (unit:dBm) of RF path B for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_5g_c:5G target tx power (unit:dBm) of RF path C for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_target_tx_pwr_5g_d:5G target tx power (unit:dBm) of RF path D for each rate section, should match the real calibrate power, -1: undefined (array of int)
parm:           rtw_tsf_update_pause_factor:num of bcn intervals to stay TSF update pause status (int)
parm:           rtw_tsf_update_restore_factor:num of bcn intervals to stay TSF update restore status (int)
parm:           rtw_phy_file_path:The path of phy parameter (charp)
parm:           rtw_load_phy_file:PHY File Bit Map (int)
parm:           rtw_decrypt_phy_file:Enable Decrypt PHY File (int)
parm:           rtw_phydm_ability:uint
parm:           rtw_halrf_ability:uint
parm:           rtw_vht_2g4:Allow VHT rate on 2.4G channel.(0 for deny and 1 for allow) (int)
parm:           rtw_en_napi:int
parm:           rtw_en_gro:int
parm:           rtw_iqk_fw_offload:int
parm:           rtw_ch_switch_offload:int

Thanks you a lot for your time!

Last edited by angryfrog (2021-05-12 06:53:53)

progandy · 2021-05-12 09:08:08

Now remove the usb adapter, start "sudo dmesg -w" and plug it back in. dmesg should show new log messages, what are those?

Last edited by progandy (2021-05-12 09:09:01)

angryfrog · 2021-05-12 09:11:33

Thanks a lot for your help!
The new lines are :

[ 7349.284505] usb 3-2: new high-speed USB device number 6 using xhci_hcd
[ 7349.454948] usb 3-2: New USB device found, idVendor=0bda, idProduct=b812, bcdDevice= 2.10
[ 7349.454952] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 7349.454953] usb 3-2: Product: 802.11ac NIC
[ 7349.454954] usb 3-2: Manufacturer: Realtek
[ 7349.454955] usb 3-2: SerialNumber: 123456
[ 7349.535935] Lockdown: systemd-udevd: unsigned module loading is restricted; see man kernel_lockdown.7

It seems it came from the lockdown mode! I have added that few months ago, I will try without and update this message.

EDIT : It works!! Thanks you a lot, I had totally forgot the lockdown mode, do you know if it's possible to whitelist a module with that?
If it's not possible, I will just let it removed.

Thanks you again, I'm really happy!

Last edited by angryfrog (2021-05-12 09:23:51)

progandy · 2021-05-12 09:47:56

If you want to use lockdown mode with self-compiled modules, then you'll have to recompile the whole kernel so you have access to the signing key.
https://wiki.archlinux.org/title/Signed_kernel_modules

Last edited by progandy (2021-05-12 09:48:54)

angryfrog · 2021-05-12 10:19:17

It's way too much of a hassle, I will just disable it, but thanks you a lot for your answer.
I wouldn't have made it without your help, everything work flawlessly now, thanks you A LOT!!!
Have a very nice day, and thanks you again.

Arch Linux

#1 2021-05-11 17:03:24

Problem WiFi AC1200 RTL88x2bu

#2 2021-05-11 17:30:11

Re: Problem WiFi AC1200 RTL88x2bu

#3 2021-05-11 17:40:52

Re: Problem WiFi AC1200 RTL88x2bu

#4 2021-05-11 17:42:16

Re: Problem WiFi AC1200 RTL88x2bu

#5 2021-05-11 19:24:18

Re: Problem WiFi AC1200 RTL88x2bu

#6 2021-05-11 19:47:04

Re: Problem WiFi AC1200 RTL88x2bu

#7 2021-05-12 06:52:38

Re: Problem WiFi AC1200 RTL88x2bu

#8 2021-05-12 09:08:08

Re: Problem WiFi AC1200 RTL88x2bu

#9 2021-05-12 09:11:33

Re: Problem WiFi AC1200 RTL88x2bu

#10 2021-05-12 09:47:56

Re: Problem WiFi AC1200 RTL88x2bu

#11 2021-05-12 10:19:17

Re: Problem WiFi AC1200 RTL88x2bu

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