MacBookPro 2017 won't connect to wifi (22.04)

Question

I'm trying to connect my 2017 15" MacBookPro to my home Wifi. Initial situation after setup was, that my neighbours wifi would show up in gnome-control-center (aka Settings), but mine wouldn't.

According to lspci, this laptop has a

03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43602 802.11ac Wireless LAN SoC [14e4:43ba] (rev 02)

Unfortunately, this exact pciid is not listed in the canonical answer. So I tried what is recommended for most devices:

# apt update
# apt upgrade
# update-pciids
# apt install firmware-b43-installer linux-firmware
# reboot
# iwconfig wlp3s0 txpower 10dBm

After that, my home network appeared in the gnome-control-center, but when I tried connecting, it keeps asking for my wifi key. (Which I've checked and rechecked...)

I can connect to the same wifi, if I boot the macbook into macos.

This is a freshly installed device, so no other drivers were ever installed, apart from what is shipped by baseline ubuntu. What should I try next?

PS: I found this and this question, unfortunately, neither has an answer.

# dmesg | grep brcm
[   14.335238] usbcore: registered new interface driver brcmfmac
[   14.354625] Bluetooth: hci0: BCM: 'brcm/BCM.hcd'
[   14.442383] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43602-pcie for chip BCM43602/2
[   14.442422] brcmfmac 0000:03:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.Apple Inc.-MacBookPro14,3.bin failed with error -2
[   14.444299] brcmfmac 0000:03:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.Apple Inc.-MacBookPro14,3.txt failed with error -2
[   14.444676] brcmfmac 0000:03:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.txt failed with error -2
[   14.777565] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43602-pcie for chip BCM43602/2
[   14.777613] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available
[   14.778545] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43602/2 wl0: Nov 10 2015 06:38:10 version 7.35.177.61 (r598657) FWID 01-ea662a8c
[   14.815923] brcmfmac 0000:03:00.0 wlp3s0: renamed from wlan0
[  413.686158] ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
[  516.062505] ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
[  798.160480] ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
[  824.923318] ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
[  831.842586] ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52

output of wireless-info

Can you force your wifi router to use a fixed channel between 1-11 — Jeremy31, Jul 29 '23 at 18:33
I believe the correct driver is not b43/bcma, et al, but brcmfmac. Please edit your question to show the result of the terminal command: sudo dmesg | grep brcm — chili555, Jul 29 '23 at 20:00
@Jeremy31 huh, that helped. I don't understand why, but it did. — Sören, Jul 29 '23 at 20:34
@chili555 If you still think I should be using a different driver, I'm still interested. Messing with txpower seems wrong. — Sören, Jul 29 '23 at 20:40
Just showing us a list of the commands isn't helpful. We need to see the results of the failing commands. Please read https://askubuntu.com/help/how-to-ask and https://askubuntu.com/help/formatting . Take the [tour]. — waltinator, Jul 29 '23 at 20:53
Does this answer your question? My wireless/WiFi connection does not work. What information is needed to diagnose the issue? — waltinator, Jul 29 '23 at 21:00
Are b43, bcma, etc. still loaded? lsmod | grep -e b43 -e bcma — chili555, Jul 29 '23 at 21:12
@chili555 That command produces no output. However brcmfmac is among the loaded modules (see output of wireless-info script) — Sören, Jul 29 '23 at 21:27
"Quality=18/70" If you take your laptop right next to the router and run: sudo iwlist scan does the link quality improve? To what numbers? — chili555, Jul 29 '23 at 23:12
The best I got was Quality=44/70 Signal level=-66 dBm when standing right next to the AP. — Sören, Jul 30 '23 at 08:56

score 0 · Answer 1 · answered Jul 30 '23 at 13:10

0

Your readings strongly suggest that one or both of the antenna wires are not firmly snapped in place on your wireless card.

At a distance of two meters or less, I'd expect a signal strength of Quality=70/70. I recommend that a qualified technician examine and repair your computer.

answered Jul 30 '23 at 13:10

chili555

60,188

Thanks, I'll try that. Although it will take some time until I can do that. – Sören Jul 30 '23 at 18:52

MacBookPro 2017 won't connect to wifi (22.04)

1 Answers1