Comment 8 for bug 1847500

On 2019/10/11 下午10:18, Dave Jones wrote:
>> For WiFi, I remember I found the firmware from someplace, then the
> WiFi worked.
>
>> ubuntu@ubuntu:~$ ls /lib/firmware/brcm/brcmfmac43455-sdio.* -la
>> -rw-r--r-- 1 root root 600487 Sep 1 05:45 /lib/firmware/brcm/brcmfmac43455-sdio.bin
>> -rw-r--r-- 1 root root 14036 Sep 1 05:45 /lib/firmware/brcm/brcmfmac43455-sdio.clm_blob
>> -rw-r--r-- 1 root root 2054 Sep 1 05:45 /lib/firmware/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt
>> -rw-r--r-- 1 root root 2054 Sep 1 05:45 /lib/firmware/brcm/brcmfmac43455-sdio.txt
>> ubuntu@ubuntu:~$ ls /lib/firmware/brcm/brcmfmac43455-sdio.* | xargs md5sum
>> 963eb0d4903040974ee88b4f85cb1f4f /lib/firmware/brcm/brcmfmac43455-sdio.bin
>> c5aeca0e33de4ae870986c517963fef7 /lib/firmware/brcm/brcmfmac43455-sdio.clm_blob
>> 7b983812a8aee7bf701460436c686226 /lib/firmware/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt
>> 7b983812a8aee7bf701460436c686226 /lib/firmware/brcm/brcmfmac43455-sdio.txt
> Most of those hashes match the latest-but-one variant of the wifi
> firmware from Raspbian. Unfortunately, updating to the very latest is
> tricky for us as the firmware blobs appear split between linux-firmware
> (which holds the *.bin files) and linux-firmware-raspi (which holds the
> *.txt and *.clm_blob) files. After a bit of experimentation I've found
> that updating just the 43455 clm_blob and txt files fixes wifi for the
> Pi4 without breaking wifi on any of the earlier versions.
>
> I'll open a separate ticket for this with a link to a PPA package and
> see if I can get it sponsored.
OK,  thanks for sharing this information.
>