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What firmware for RTL8821CE?

Linux Kernel, Network, and Services configuration.
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bester69
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What firmware for RTL8821CE?

#1 Post by bester69 »

Hi,

I dont know what driver to use for my wifi RTL8821CE

I found this two ones available.:
https://github.com/tomaspinho/rtl8821ce
OR
https://github.com/lwfinger/rtw88

Ive tested both of them, and they both give me similar eventually dropping issues..

Now, Im testing following settings.:
rtl8821ce (tomas)
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=noaer"
Wifi PowerManagement: OFF

This last module, tend to stop working after sleep..I think I might fix it with following workaround.:

wakeup_script.sh

Code: Select all

#!/bin/sh
case $1 in
    post)
su root -c "modprobe  8821ce"
        ;;       
     pre)    
su root -c "modprobe -r 8821ce"
     ;;
esac
Furthermore, this last module is very slow waking up (around 10 seconds or more)
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Re: What firmware for RTL8821CE?

#2 Post by bw123 »

If it is [10ec:c821] then there's already a driver in the kernel on bullseye. Modinfo command can tell you what firmwares the driver will want, appears it needs none from here. lwfinger usually includes firmwares in source, or instructions for obtaining it.
I suppose one of the modules it depends on could need a firmware, you can check dmesg for (failed) firmware requests.

Code: Select all

#  modinfo  rtw88_8821ce | grep alias
alias:          pci:v000010ECd0000C821sv*sd*bc*sc*i*
# modinfo  rtw88_8821ce | grep firmware
# modinfo  rtw88_8821ce | grep depends
depends:        rtw88_pci,rtw88_8821c
# uname -a
Linux debian 5.10.0-8-amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64 GNU/Linux
Last edited by bw123 on 2021-09-12 15:03, edited 1 time in total.
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Re: What firmware for RTL8821CE?

#3 Post by bw123 »

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Re: What firmware for RTL8821CE?

#4 Post by bester69 »

There is not any firmware for 8821CE, wonder why :shock:
https://packages.debian.org/bullseye/firmware-realtek
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