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Rescuing a broken asahi linux workstation - Alexis Métaireau </title>
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<a class="main" href="/">Alexis Métaireau</a>
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<h1 class="post-title">Rescuing a broken asahi linux workstation</h1>
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<p>
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<em>How I used Alpine linux as a rescue system</em>
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<time datetime="2023-12-08T00:00:00+01:00">08 décembre 2023</time>
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<p>On my main machine, I’m currently using <a href="asahilinux.org/">Asahi Linux</a> (on a macbook m1). I’ve recently broken my system, which wasn’t able to boot because of a broken <code>/etc/fstab</code>.</p>
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<p>On my previous setups, I was able to easily plug an usb key and boot to it to solve my issues, but here I wasn’t sure how to deal with it.</p>
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<p>After playing a bit (without much luck) with <a href="https://github.com/leifliddy/fedora-macos-asahi-qemu/">qemu and vagrant</a>, someone pointed me to the right direction: using alpine linux.</p>
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<p>Here’s what I did to solve my broken install:</p>
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<p>First, install this alpine linux on a key.</p>
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<p><a href="https://dev.alpinelinux.org/~mps/m1/m1-usb-alpine-install.img.xz">Download the iso image here</a>, and copy it to a key. I’m not sure why, but <code>dd</code> didn’t work for me, and I ended up using another tool to create the usb from the iso. </p>
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<div class="highlight"><pre><span></span><code><span class="c1"># When booting, press a key to enter u-boot. Then:</span>
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env<span class="w"> </span><span class="nb">set</span><span class="w"> </span>boot_efi_bootmgr
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run<span class="w"> </span>bootcmd_usb0
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</code></pre></div>
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<p>Which should get you a session. When connected, do the following:</p>
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<div class="highlight"><pre><span></span><code><span class="c1"># to find the parition you want to mount, marked EFI something</span>
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lsblk<span class="w"> </span>-f
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mount<span class="w"> </span><span class="nv">label</span><span class="o">=</span><span class="s2">"EFI - FEDOR"</span><span class="w"> </span>/mnt
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<span class="c1"># Install the wifi firmware</span>
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<span class="nb">cd</span><span class="w"> </span>/lib/firmware
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tar<span class="w"> </span>xvf<span class="w"> </span>/mnt/vendor/firmware.tar
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/root/update-vendor-firmware
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rm<span class="w"> </span>/etc/modprobe.d/blacklist-brcmfmac.conf
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modprobe<span class="w"> </span>brcmfmac
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<span class="c1"># Connect to the wifi</span>
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/etc/init.d/iwd<span class="w"> </span>start
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iwctl
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</code></pre></div>
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<p>In my case, I wanted to mount a btrfs filesystem to fix something inside.</p>
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<div class="highlight"><pre><span></span><code>apk<span class="w"> </span>add<span class="w"> </span>btrfs-progs
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<span class="nb">echo</span><span class="w"> </span>btrfs<span class="w"> </span>>><span class="w"> </span>/etc/modules
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modprobe<span class="w"> </span>btrfs
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mount<span class="w"> </span><span class="nv">LABEL</span><span class="o">=</span><span class="s2">"fedora"</span><span class="w"> </span>/opt/fedora
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</code></pre></div>
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<p>I then could access the filesystem, and made a fix to it.</p>
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<hr>
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<p>Resources:</p>
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<ul>
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<li>https://arvanta.net/alpine/install-alpine-m1/</li>
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<li>https://arvanta.net/alpine/iwd-howto/</li>
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<li>https://wiki.alpinelinux.org/wiki/Btrfs</li>
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</ul>
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<p>
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<a href="https://blog.notmyidea.org/tag/linux.html">#Linux</a>
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, <a href="https://blog.notmyidea.org/tag/asahi.html">#Asahi</a>
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- Posté dans la catégorie <a href="https://blog.notmyidea.org/code/">code</a>
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