David Heinemeier HanssonandClaude Opus 5
ed710a3b41
Every boot entry has named vmlinuz-linux-t2 since0638855, but the file has contained stock Arch. Verified against the shipped ISO: arch/boot/x86_64/vmlinuz-linux-t2: bzImage, version 7.1.5-arch1-1 (linux@archlinux) while the mirror carries linux-t2-7.1.4-2. T2 MacBooks have been installing with no keyboard or trackpad in the live environment. Kernel packages ship nothing in /boot — only usr/lib/modules/<kver>/vmlinuz. install_kernel() in /usr/share/libalpm/scripts/mkinitcpio sources /etc/mkinitcpio.d/<pkgbase>.preset and copies THAT package's kernel to whatever ALL_kver names, whenever is_kernelcopy() sees an unowned absolute path. Our file was named linux.preset, so it overrode releng's copy of the same name and pointed the STOCK kernel at the T2 filenames. linux-t2's own generated preset writes those same two paths, and stock won.c23e0e7introduced it a week after0638855added T2 support, so the feature worked for exactly seven days: before the preset existed, releng's linux.preset kept the stock kernel on its own filenames and linux-t2's generated preset produced the real thing. The fix is the filename. releng's linux.preset takes over the stock kernel again, which now writes /boot/vmlinuz-linux and initramfs-linux.img instead of squatting on the T2 names — so the ISO grows by one kernel and one archiso initramfs. That cost is not free and is worth revisiting: the stock kernel is in the live root only because releng's broadcom-wl hard-depends on it, and broadcom-wl is a prebuilt module for that kernel which cannot load on the T2 one we now boot. Dropping both is ~147MB and old Broadcom Macs lose live Wi-Fi. Boot the ISO on a T2 Mac before trusting this; the version string is only evidence that the right kernel ships, not that it works. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
19 lines
825 B
Plaintext
19 lines
825 B
Plaintext
# mkinitcpio preset file for the 'linux-t2' package on archiso
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#
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# The filename is the pkgbase, and that is load-bearing. Kernel packages ship
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# nothing in /boot — they only install usr/lib/modules/<kver>/vmlinuz — so
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# mkinitcpio's alpm hook sources /etc/mkinitcpio.d/<pkgbase>.preset and copies
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# THAT package's kernel to whatever ALL_kver names (is_kernelcopy in
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# /usr/share/libalpm/scripts/mkinitcpio). Named linux.preset, this pointed the
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# stock kernel at the T2 filenames, so the ISO booted stock Arch while every
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# boot entry said linux-t2 and T2 Macs got no keyboard or trackpad.
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#
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# releng ships its own linux.preset for the stock kernel; leave it alone.
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PRESETS=('archiso')
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ALL_kver='/boot/vmlinuz-linux-t2'
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archiso_config='/etc/mkinitcpio.conf.d/archiso.conf'
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archiso_image="/boot/initramfs-linux-t2.img"
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