I'm actually getting good results using the updated brcmfmac43455
firmware files which Raspbian is using. To use them I first removed
'/lib/firmware/brcm/brcmfmac43455-sdio.raspberrypi*' then put the
brcmfmac43455-sdio* files in the same directory and rebooted.
ubuntu@ubuntu:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"
ubuntu@ubuntu:~$ ip address show wlan0
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
group default qlen 1000
link/ether dc:a6:32:37:37:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.111/24 brd 192.168.1.255 scope global dynamic wlan0
valid_lft 85747sec preferred_lft 85747sec
inet6 fe80::dea6:32ff:fe37:3708/64 scope link
valid_lft forever preferred_lft forever
ubuntu@ubuntu:~$ md5sum /lib/firmware/brcm/brcmfmac43455-sdio.*
963eb0d4903040974ee88b4f85cb1f4f /lib/firmware/brcm/brcmfmac43455-sdio.bin
c5aeca0e33de4ae870986c517963fef7 /lib/firmware/brcm/brcmfmac43455-sdio.clm_blob
7b983812a8aee7bf701460436c686226 /lib/firmware/brcm/brcmfmac43455-sdio.txt
ubuntu@ubuntu:~$ dmesg | grep brcmfmac
[ 12.265990] brcmfmac: F1 signature read @0x18000000=0x15264345
[ 12.271828] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio
for chip BCM4345/6
[ 12.284536] usbcore: registered new interface driver brcmfmac
[ 12.355127] brcmfmac mmc1:0001:1: Direct firmware load for
brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt failed with error -2
[ 12.548549] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio
for chip BCM4345/6
[ 12.579186] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Feb 27
2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04
[ 13.578117] brcmfmac: power management disabled
ubuntu@ubuntu:~$ iw dev
phy#0
Unnamed/non-netdev interface
wdev 0x2
addr 52:4f:c2:5b:63:7a
type P2P-device
txpower 31.00 dBm
Interface wlan0
ifindex 3
wdev 0x1
addr dc:a6:32:37:37:08
ssid Linksys01146_5GHz
type managed
channel 44 (5220 MHz), width: 80 MHz, center1: 5210 MHz
txpower 31.00 dBm
For the record I'm connecting to a Linksys EA7450 wireless access point
and I've restricted the 5GHz frequency to 802.11ac only.
** Tags added: bionic eoan focal rls-ff-incoming
** Tags removed: rls-ff-incoming
** Description changed:
We were not able to completely pin-point the issue yet, so this is more
of a blanket bug for the current issues we are seeing. We don't know
where exactly the issue can be located.
While preparing and testing 18.04.4, certification reported issues with
our uc18 images on the pi4 with wifi ac tests. One of our engineers
(Brian) confirmed it locally with a wifi access point restricted only to
802.11ac. After some additional testing, he noticed that he had the same
unreliable symptoms for both the classic and core images, as well as the
19.10.1 classic images. The symptoms seem to vary, from inability to
- detect 802.11ac APs, unability to connect and/or receive an IP address
+ detect 802.11ac APs, inability to connect and/or receive an IP address
and no traffic getting through.
- We will provide all the information that we have. Raspbian, after some
- initial testing, seems to work better in this regard (though we saw
- various reports of it still being a bit flaky). We have tried pulling in
- the wifi firmware bits from Raspbian and using those, but the issues
- were still the same.
+ We will provide all the information that we have. Raspbian works better
+ in this regard. We have pulled in the wifi firmware bits from Raspbian
+ and using those, and that seems to resolve all flakiness.
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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1862760
Title:
Unreliable 802.11ac connection on our raspi images
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1862760/+subscriptions
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