Bug#945172: firmware: failed to load rtw88/rtw8822b_fw.bin (workaround)

From	dlf29 <dlf29@et.byu.edu>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#945172: firmware: failed to load rtw88/rtw8822b_fw.bin (workaround)
Date	2020-03-07 20:50 +0100
Message-ID	<zHNCp-mW-5@gated-at.bofh.it> (permalink)
References	<z4F5g-3uE-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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The rtwpci driver in Linux kernel 5.4 from buster-packports is looking 
for the firmware in a different path than is provided in the 
firmware-realtek package.  This can be seen in the dmesg log.

There doesn't seem to be a firmware-realtek package for Linux 5.4 in 
buster-backports.  I hard linked the original firmware to the path 
expected by the backported kernel, and the wifi began to work:

As root (or with sudo):

modprobe -r rtwpci
mkdir /usr/lib/firmware/rtw88
ln /usr/lib/firmware/rtlwifi/rtl8822befw.bin 
/usr/lib/firmware/rtw88/rtl8822b_fw.bin
modprobe rtw8822b_fw.bin

I imagine this will only be necessary when using a backported kernel in 
Buster.  It may not be necessary in Debian testing and/or sid.

Thread

Bug#945172: firmware: failed to load rtw88/rtw8822b_fw.bin Nelson G <ledufff@hotmail.com> - 2019-11-20 21:50 +0100
  Bug#945172: same issue on ThinkPad E490 joenio@joenio.me <joenio@joenio.me> - 2020-01-16 05:00 +0100
  Bug#945172: firmware: failed to load rtw88/rtw8822b_fw.bin (workaround) dlf29 <dlf29@et.byu.edu> - 2020-03-07 20:50 +0100
  Bug#945172: firmware: failed to load rtw88/rtw8822b_fw.bin (workaround - correction) Daniel Fussell <dlf29@et.byu.edu> - 2020-03-10 00:20 +0100
  Bug#945172: Same issue for Thinnkpad E480 fpulido@linagora.com - 2020-06-30 14:40 +0200
  Bug#945172: marked as done (firmware: failed to load  rtw88/rtw8822b_fw.bin) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-07-17 12:10 +0200

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