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#1 2020-10-18 02:04:02

ben781
Member
Registered: 2016-12-11
Posts: 14

RTL8821CE driver is not working in kernel 5.9.1

Kernel 5.9 has support for RTL8821CE, so I removed rtl8821ce-dkms-git after the update. Now my wifi does not work. I can see that linux 5.9.1.arch1-1 contains usr/lib/modules/5.9.1-arch1-1/kernel/drivers/net/wireless/realtek/rtw88/rtw88_8821ce.ko.xz. How do I make the driver in the kernel work? I would prefer that to reinstalling rtl8821ce-dkms-git.

EDIT: Upon further inspection and research, I have discovered it is because my RTL8821CE chip is RFE2, which is not supported by the kernel driver yet.

Last edited by ben781 (2020-10-18 04:20:33)

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#2 2020-10-21 01:50:26

jimery
Member
Registered: 2019-11-08
Posts: 2

Re: RTL8821CE driver is not working in kernel 5.9.1

i'm facing the same problem, i blacklist `rtw88_8821ce` and reinstall rlt8821-ce-dkms aur package, it still doesn't work.

```
lspci
05:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
```
```
~ > lsmod| grep 8821                                                                                                                                                                                     
8821ce               1974272  0
cfg80211              913408  1 8821ce
```
```
~ > dmesg| grep 8821     
[    0.138821] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    3.279242] 8821ce: loading out-of-tree module taints kernel.
[    3.303910] 8821ce: module verification failed: signature and/or required key missing - tainting kernel
[    3.417062] rtl8821ce 0000:05:00.0: enabling device (0000 -> 0003)
[    4.105489] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c lmp_ver=08 lmp_subver=8821
[    4.106482] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_fw.bin
[    4.107673] Bluetooth: hci0: RTL: loading rtl_bt/rtl8821c_config.bin

```

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