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Sender: Larry Finger <larry.finger@gmail.com>
Subject: Re: [Bug report] - RTL8821CE 802.11ac PCIe Wireless Network Adapter -
 Not handled properly by the rtw_8821ce dirver on Kernel 5.11.11
To:     Michal TOMA <michaltoma@sicoop.com>, linux-wireless@vger.kernel.org
References: <2562248.KvEgbkE9EU@linux-9g0r.site>
From:   Larry Finger <Larry.Finger@lwfinger.net>
Message-ID: <c0afc587-b8f8-8bae-5589-92ebac536c9e@lwfinger.net>
Date:   Wed, 14 Apr 2021 13:01:49 -0500
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On 4/14/21 4:12 AM, Michal TOMA wrote:
> The RTL8821CE driver doesn't work on several recent kernels (probably since
> 5.9).
> 
> 
> journalctl -b | grep rtw
> avril 10 14:18:41 localhost kernel: rtw_8821ce 0000:07:00.0: Firmware version 24.8.0, H2C version 12
> avril 10 14:18:41 localhost NetworkManager[682]: <info>  [1618057121.6199] 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)
> avril 10 14:18:41 localhost kernel: rtw_8821ce 0000:07:00.0 wlp7s0: renamed from wlan0
> avril 10 14:18:42 localhost kernel: rtw_8821ce 0000:07:00.0: start vif 28:39:26:ab:b4:5d on port 0
> avril 10 14:18:42 localhost kernel: rtw_8821ce 0000:07:00.0: stop vif 28:39:26:ab:b4:5d on port 0
> avril 10 14:18:42 localhost kernel: rtw_8821ce 0000:07:00.0: start vif 5a:f0:11:63:85:65 on port 0
> avril 10 14:25:35 Host-001 kernel: rtw_8821ce 0000:07:00.0: stop vif 5a:f0:11:63:85:65 on port 0
> avril 10 14:25:35 Host-001 kernel: rtw_8821ce 0000:07:00.0: start vif 32:45:38:02:34:09 on port 0
> avril 10 14:32:28 Host-001 kernel: rtw_8821ce 0000:07:00.0: stop vif 32:45:38:02:34:09 on port 0
> avril 10 14:32:28 Host-001 kernel: rtw_8821ce 0000:07:00.0: start vif c2:5c:03:32:bc:19 on port 0
> avril 10 14:39:21 Host-001 kernel: rtw_8821ce 0000:07:00.0: stop vif c2:5c:03:32:bc:19 on port 0
> avril 10 14:39:21 Host-001 kernel: rtw_8821ce 0000:07:00.0: start vif de:9c:ac:b2:58:ae on port 0
> avril 10 14:46:14 Host-001 kernel: rtw_8821ce 0000:07:00.0: stop vif de:9c:ac:b2:58:ae on port 0
> avril 10 14:46:14 Host-001 kernel: rtw_8821ce 0000:07:00.0: start vif 46:5c:c2:91:f8:7f on port 0
> ...
> And continues like this indefinitely
> 
> uname -a
> Linux Host-001 5.11.11-1-default #1 SMP Tue Mar 30 17:57:52 UTC 2021 (dbc4a02) 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
> 

Please copy file dmesg.txt from 'dmesg > dmesg.txt' to some pastebin that I can 
access. The sending of only lines with rtw in them may miss some valid information.

Larry