The RTL8821CE driver doesn't work on several recent kernels (probably since
5.9).
journalctl -b | grep 8821
mars 19 22:49:13 localhost kernel: rtw_8821ce 0000:07:00.0: Firmware version
24.8.0, H2C version 12
mars 19 22:49:13 localhost NetworkManager[639]: <info> [1616190553.7766]
rfkill2: found Wi-Fi radio killswitch (at
/sys/devices/pci0000:00/0000:00:1d.4/0000:07:00.0/ieee80211/phy0/rfkill2)
(driver rtw_8821ce)
mars 19 22:49:13 localhost kernel: rtw_8821ce 0000:07:00.0 wlp7s0: renamed
from wlan0
mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: start vif
28:39:26:ab:b4:5d on port 0
mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: stop vif
28:39:26:ab:b4:5d on port 0
mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: start vif
7a:36:c4:26:1d:f1 on port 0
mars 19 22:56:07 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
7a:36:c4:26:1d:f1 on port 0
mars 19 22:56:07 linux.local kernel: rtw_8821ce 0000:07:00.0: start vif
c2:a0:c3:48:17:58 on port 0
mars 19 23:03:00 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
c2:a0:c3:48:17:58 on port 0
mars 19 23:03:00 linux.local kernel: rtw_8821ce 0000:07:00.0: start vif
ae:92:06:47:50:83 on port 0
mars 19 23:09:52 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
ae:92:06:47:50:83 on port 0
...
And continues like this indefinitely
uname -a
Linux linux.local 5.11.6-1-default #1 SMP Thu Mar 11 16:11:36 UTC 2021
(7358b30) x86_64 x86_64 x86_64 GNU/Linux
rfkill list
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
On 3/26/21 7:16 AM, Michal TOMA wrote:
> The RTL8821CE driver doesn't work on several recent kernels (probably since
> 5.9).
>
>
> journalctl -b | grep 8821
> mars 19 22:49:13 localhost kernel: rtw_8821ce 0000:07:00.0: Firmware version
> 24.8.0, H2C version 12
> mars 19 22:49:13 localhost NetworkManager[639]: <info> [1616190553.7766]
> rfkill2: found Wi-Fi radio killswitch (at
> /sys/devices/pci0000:00/0000:00:1d.4/0000:07:00.0/ieee80211/phy0/rfkill2)
> (driver rtw_8821ce)
> mars 19 22:49:13 localhost kernel: rtw_8821ce 0000:07:00.0 wlp7s0: renamed
> from wlan0
> mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: start vif
> 28:39:26:ab:b4:5d on port 0
> mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: stop vif
> 28:39:26:ab:b4:5d on port 0
> mars 19 22:49:14 localhost kernel: rtw_8821ce 0000:07:00.0: start vif
> 7a:36:c4:26:1d:f1 on port 0
> mars 19 22:56:07 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
> 7a:36:c4:26:1d:f1 on port 0
> mars 19 22:56:07 linux.local kernel: rtw_8821ce 0000:07:00.0: start vif
> c2:a0:c3:48:17:58 on port 0
> mars 19 23:03:00 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
> c2:a0:c3:48:17:58 on port 0
> mars 19 23:03:00 linux.local kernel: rtw_8821ce 0000:07:00.0: start vif
> ae:92:06:47:50:83 on port 0
> mars 19 23:09:52 linux.local kernel: rtw_8821ce 0000:07:00.0: stop vif
> ae:92:06:47:50:83 on port 0
> ...
> And continues like this indefinitely
>
> uname -a
> Linux linux.local 5.11.6-1-default #1 SMP Thu Mar 11 16:11:36 UTC 2021
> (7358b30) x86_64 x86_64 x86_64 GNU/Linux
>
> rfkill list
> 0: ideapad_wlan: Wireless LAN
> Soft blocked: no
> Hard blocked: no
> 1: ideapad_bluetooth: Bluetooth
> Soft blocked: no
> Hard blocked: no
> 2: phy0: Wireless LAN
> Soft blocked: no
> Hard blocked: no
>
I want to add a bit to this report as I have been helping Michal on an openSUSE
bugzilla thread. His driver comes from my repo at
https://GitHub.com/lwfinger/rtw88.git. That code corresponds to wireless-next
with fixes for kernel API changes. The repo provides 8822ce code that works
perfectly on my machine.
I do not have an 8821ce cdhip, thus I cannot verify this directly. What would be
helpful is for the Realtek devs to suggest debug parameters that would yield
information as to why the driver does not attempt to authenticate, but
immediately stops the vif.
Thanks,
Larry