Jamie Wilkinson <jaq@debian.org> (2023-03-07): > I am installing on an Asus PN51-E1 which includes the Mediatek MT7921e > wifi device. > > I came across this bug while trying to install from > https://cdimage.debian.org/cdimage/bookworm_di_alpha2/ netinst iso on > a USB stick. > > I see the same error, but what I was trying to debug when I arrived at > this bug is why we see the error in dmesg: > > mt7921e 0000:05:00.0: firmware: failed to load > mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin (-2) That's expected: no firmware is deployed at first, the kernel complains, d-i notices, and deploys stuff if relevant firmware packages are found, and reload the relevant modules. This reloading is what breaks the kernel. See upstream bug report: https://bugzilla.kernel.org/show_bug.cgi?id=216844 > because when I break to the console in the installer, I see in > /lib/firmware this very file: > > ~ # ls /lib/firmware/mediatek/WIFI_* > WIFI_MT7922_patch_mcu_1_1_hdr.bin > WIFI_MT7961_patch_mcu_1_2_hdr.bin > WIFI_RAM_CODE_MT7922_1.bin > WIFI_RAM_CODE_MT7961_1.bin That's expected after an initial check-missing-firmware run. > When I tried again in Expert install mode, I looked before detecting > network devices, and saw that /lib/firmware was empty. What's > populating this directory? Is it a chroot and thus the kernel module > can't see it? Or... is the kernel module looking in a different path? You can check /var/log/syslog, looking for check-missing-firmware lines. You'll see what it notices, and does. Cheers, -- Cyril Brulebois (kibi@debian.org) <https://debamax.com/> D-I release manager -- Release team member -- Freelance Consultant
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