Hello, First time contacting a kernel mailing list. I've been trying to fix the wireless on my laptop ( MacBookPro12,1 ). It has very weak signal strength. I have at least partially read through the following: https://askubuntu.com/questions/775011/macbook-pro-16-04-wifi-driver-installed-but-not-available https://askubuntu.com/questions/1064442/wifi-not-working-with-bcm43602-on-ubuntu-18-04 https://askubuntu.com/questions/622988/wifi-issues-with-macbook-pro-retina-early-2015-12-2-on-ubuntu-15-04 https://wiki.debian.org/brcmfmac https://ubuntuforums.org/showthread.php?t=2354365 https://askubuntu.com/questions/884291/ubuntu-14-04-wireless-not-working-on-macbook-pro-dual-boot https://www.mail-archive.com/linux-wireless@xxxxxxxxxxxxxxx/msg17229.html https://www.mail-archive.com/search?l=ubuntu-bugs@xxxxxxxxxxxxxxxx&q=subject:%22%5C%5BBug+1693521%5C%5D+Re%5C%3A+brcmfmac%5C%3A+Direct+firmware+load+failed%22&o=newest https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1772624 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/brcm/ I created empty files at `/lib/firmware/{brcmfmac43602-pcie.Apple\ Inc.-MacBookPro14\,2.txt,brcmfmac43602-pcie.txt}` ``` $ dmesg | grep brcm [ 5.305998] usbcore: registered new interface driver brcmfmac [ 5.433599] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43602-pcie for chip BCM43602/2 [ 5.435140] brcmfmac 0000:02:00.0: loading /lib/firmware/brcm/brcmfmac43602-pcie.Apple Inc.-MacBookPro14,2.txt failed with error -22 [ 5.435142] brcmfmac 0000:02:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.Apple Inc.-MacBookPro14,2.txt failed with error -22 [ 5.435358] brcmfmac 0000:02:00.0: loading /lib/firmware/brcm/brcmfmac43602-pcie.txt failed with error -22 [ 5.435359] brcmfmac 0000:02:00.0: Direct firmware load for brcm/brcmfmac43602-pcie.txt failed with error -22 [ 5.781881] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43602-pcie for chip BCM43602/2 [ 5.781910] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 5.782927] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43602/2 wl0: Nov 10 2015 06:38:10 version 7.35.177.61 (r598657) FWID 01-ea662a8c [ 5.828561] brcmfmac 0000:02:00.0 wlp2s0: renamed from wlan0 ``` What I think may need to happen is to have a particular configuration added like https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/plain/brcm/brcmfmac43430-sdio.raspberrypi,3-model-b.txt as `brcmfmac43602-pcie.txt` in order to make the full range of channels available, and by that improve signal strength, but this is only a shot in the dark. --- The information in this email, including attachments, may be confidential and is intended solely for the addressee(s). If you believe you received this email by mistake, please notify the sender by return email as soon as possible.
