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Thread: Persistent unclaimed Realtek controller

  1. #1
    Join Date
    Feb 2011
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    446
    Distro
    Ubuntu 18.04 Bionic Beaver

    Persistent unclaimed Realtek controller

    Hi all To keep this short. I upgraded to 19.04 a couple of months ago, built-in wifi wasn’t detected, used USB adaptor instead. A couple of days ago, decided to give Zorin a try, it too wouldn’t detect wifi. Searching for solutions suggested:
    Code:
    sudo lshw -C network
    To see if the adaptor is detected. The result:
    Code:
    *-network UNCLAIMED             description: Network controller        product: RTL8821CE 802.11ac PCIe Wireless Network Adapter        vendor: Realtek Semiconductor Co., Ltd.        physical id: 0        bus info: pci@0000:01:00.0        version: 00        width: 64 bits        clock: 33MHz        capabilities: pm msi pciexpress cap_list        configuration: latency=0        resources: ioport:e000(size=256) memory:fea00000-fea0ffff
    Searching for help regarding unclaimed controllers, yielded some potential solutions: One theory was that drivers couldn’t be installed because secure boot was enabled, solution, disable. This was not my case as it had remained disabled, I checked before starting install. Another solution was to purge the bcmwl-kernel-source and reinstall it. This didn’t work Next was
    Code:
    sudo -i echo "options rtl8821ce msi=1"  >  /etc/modprobe.d/rtl8821ce.conf exit
    Didn’t work Thinking this might be Zorin specific, I gave Ubuntu-Mate a quick spin. Same problem, same ineffective solutions. Decided to be smart and did a fresh install of Windows thinking that might somehow fix the issue. Nope. Finally I tried resetting all the BIOS defaults to factory fresh... Still nothing. Needless to say, the suggestions and confirmed solutions of doing a fresh install didn’t work either. Sorry it’s not as short as I hoped. Given that this problem on multiple forums/blogs seems to get very little response (as in someone will start a thread a long time ago, but no responses are given), and the solutions which are offered seem to help everyone else, I’m wondering if it’s even worth asking this question, but... Can anyone tell me why I seem to have a persistently unclaimed, and seemingly un-claimable Realtek controller? And how I can reclaim it please? P.S I'm back using a fresh install of Zorin, if that matters. Edit: No additional drivers available in any of the versions when I checked.

  2. #2
    Join Date
    Aug 2005
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    South Carolina, USA
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    24,848
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    Ubuntu 19.04 Disco Dingo

    Re: Persistent unclaimed Realtek controller

    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  3. #3
    Join Date
    Oct 2006
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    55,873

    Re: Persistent unclaimed Realtek controller

    Thread moved to the "Ubuntu/Debian BASED" forum.

  4. #4
    Join Date
    Feb 2011
    Beans
    446
    Distro
    Ubuntu 18.04 Bionic Beaver

    Re: Persistent unclaimed Realtek controller

    Quote Originally Posted by chili555 View Post
    Just tried that, but was unsuccessful, the device is still unclaimed and not detected.

  5. #5
    Join Date
    Aug 2005
    Location
    South Carolina, USA
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    24,848
    Distro
    Ubuntu 19.04 Disco Dingo

    Re: Persistent unclaimed Realtek controller

    What is the exact response to the terminal command:
    Code:
    sudo modprobe 8821ce
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  6. #6
    Join Date
    Feb 2011
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    446
    Distro
    Ubuntu 18.04 Bionic Beaver

    Re: Persistent unclaimed Realtek controller

    Quote Originally Posted by chili555 View Post
    What is the exact response to the terminal command:
    Code:
    sudo modprobe 8821ce
    No output...

  7. #7
    Join Date
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    Location
    South Carolina, USA
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    24,848
    Distro
    Ubuntu 19.04 Disco Dingo

    Re: Persistent unclaimed Realtek controller

    Quote Originally Posted by MibunoOokami View Post
    No output...
    Let’s have a look at:
    Code:
    lspci  -nnk | grep 0280
    modinfo 8821ce
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  8. #8
    Join Date
    Feb 2011
    Beans
    446
    Distro
    Ubuntu 18.04 Bionic Beaver

    Re: Persistent unclaimed Realtek controller

    Code:
    lspci  -nnk | grep 0280
    01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
    Code:
    modinfo 8821ce
    filename:       /lib/modules/4.15.0-30-generic/updates/dkms/8821ce.ko
    version:        v5.5.2_34066.20190614_COEX20180712-3232
    author:         Realtek Semiconductor Corp.
    description:    Realtek Wireless Lan Driver
    license:        GPL
    srcversion:     0FAAE8BA985C1EE690CE616
    alias:          pci:v000010ECd0000C82Bsv*sd*bc*sc*i*
    alias:          pci:v000010ECd0000C82Asv*sd*bc*sc*i*
    alias:          pci:v000010ECd0000C821sv*sd*bc*sc*i*
    depends:        cfg80211
    retpoline:      Y
    name:           8821ce
    vermagic:       4.15.0-30-generic SMP 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_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_config: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_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_pwrtrim_enable:int
    parm:           rtw_initmac:charp
    parm:           rtw_special_rf_path:int
    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_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_pci_aspm_enable:int
    parm:           rtw_max_roaming_times:The max roaming times to try (uint)
    parm:           rtw_mc2u_disable: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_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_en_napi:int
    parm:           rtw_en_gro:int
    parm:           rtw_iqk_fw_offload:int
    parm:           rtw_ch_switch_offload:int

  9. #9
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    24,848
    Distro
    Ubuntu 19.04 Disco Dingo

    Re: Persistent unclaimed Realtek controller

    Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter [10ec:c821]
    The driver covers your exact device:
    modinfo 8821ce
    filename: /lib/modules/4.15.0-30-generic/updates/dkms/8821ce.ko
    version: v5.5.2_34066.20190614_COEX20180712-3232
    author: Realtek Semiconductor Corp.
    description: Realtek Wireless Lan Driver
    license: GPL
    srcversion: 0FAAE8BA985C1EE690CE616
    alias: pci:v000010ECd0000C82Bsv*sd*bc*sc*i*
    alias: pci:v000010ECd0000C82Asv*sd*bc*sc*i*
    alias: pci:v000010ECd0000C821sv*sd*bc*sc*i*
    So I don't understand what is meant by:
    ust tried that, but was unsuccessful
    Let's see:
    Code:
    rfkill list all
    dmesg | grep -i rtl
    dmesg | grep 8821
    iwconfig
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D., Sc.D.

  10. #10
    Join Date
    Feb 2011
    Beans
    446
    Distro
    Ubuntu 18.04 Bionic Beaver

    Re: Persistent unclaimed Realtek controller

    Perhaps I used the wrong choice of words. What was meant is that because the internal wi-fi adapter is still not being detected, and is still showing up as unclaimed, the commands must have been unsuccessful.

    Code:
    rfkill list all
    0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    Code:
    dmesg | grep -i rtl
    [    1.253526] r8169 0000:02:00.0 eth0: RTL8168g/8111g at 0x        (ptrval), 98:29:a6:92:0c:ea, XID 0c000880 IRQ 32
    [    1.820088] usb 2-2: Product: RTL8191S WLAN Adapter 
    [   19.182090] RTW: rtl8821ce v5.5.2_34066.20190614_COEX20180712-3232
    [   19.182092] RTW: rtl8821ce BT-Coex version = COEX20180712-3232
    [   19.183728] rtl8821ce 0000:01:00.0: enabling device (0000 -> 0003)
    [   19.187187] RTW: CHIP TYPE: RTL8821CE
    [   19.231879] rtl8821ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0001 address=0x00000000ffff3000 flags=0x0000]
    [   20.195245] r8712u: register rtl8712_netdev_ops to netdev_ops
    [   21.334847] usb 2-2: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
    [   29.404262] RTW: ERROR rtl8821c_fw_dl Download Firmware from array failed
    Code:
    dmesg | grep 8821
    [   19.182090] RTW: rtl8821ce v5.5.2_34066.20190614_COEX20180712-3232
    [   19.182092] RTW: rtl8821ce BT-Coex version = COEX20180712-3232
    [   19.183728] rtl8821ce 0000:01:00.0: enabling device (0000 -> 0003)
    [   19.187187] RTW: CHIP TYPE: RTL8821CE
    [   19.188594] RTW: Chip Version Info: CHIP_8821C_Normal_Chip_UMC_B_CUT_1T1R_RomVer(1)
    [   19.231879] rtl8821ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0001 address=0x00000000ffff3000 flags=0x0000]
    [   29.404262] RTW: ERROR rtl8821c_fw_dl Download Firmware from array failed
    Code:
    iwconfig
    lo        no wireless extensions.
    
    enp2s0    no wireless extensions.

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