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misc:acpi_patch [2025/10/22 20:55] – rqmmisc:acpi_patch [2025/12/13 12:10] (current) – rqm
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 ====== The Dreaded ACPI Timeout Bug ====== ====== The Dreaded ACPI Timeout Bug ======
 +
 +----
 +===== ⚠️ IMPORTANT =====
 +
 +As of  Sun Nov 23 19:56:24 2025 this bug has been [[https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/acpi/dsdt.c?ipk=o-qnntKcxllUqcGWG9W-C-riLyb0POvhyp3hLhnaFy4|fixed in OpenBSD 7.8-current]], and so it will be fixed in the OpenBSD 7.9-stable release.  
 +
 +Therefore **THE LAST OpenBSD 7.8-stable build [[https://mirror.openbsdonapple.wiki/pub/OpenBSD/7.8/amd64/|provided on our mirror]] with the below ACPI patch will be the one built on 2025-12-07,** incorporating OpenBSD 7.8 errata patches no. 001-011.
 +
 +**USERS AFFECTED BY THIS ARE ADVISED TO UPGRADE TO 7.8-current by grabbing a [[https://ftp.openbsd.org/pub/OpenBSD/snapshots/amd64/|snapshot installer]] or running** `sysupgrade -s`, and when it is released in 2026, upgrade to OpenBSD 7.9.
 +----
 +
 +===== The ACPI bug =====
  
 Some models can experience really, really long boot times with OpenBSD. This bug has been known for a while and seems to have appeared around OpenBSD 7.6. It has [[https://bsd.network/@brynet/114322673716285788|featured]] [[https://old.reddit.com/r/openbsd/comments/1ixz0bn/macbook_2015/|in]] [[https://marc.info/?l=openbsd-bugs&m=173855804823166&w=2|a lot of]] [[https://marc.info/?l=openbsd-misc&m=174438934730598&w=2|discussions]], and resolving it caused so much unbridled joy that it prompted the creation of this entire wiki. Some models can experience really, really long boot times with OpenBSD. This bug has been known for a while and seems to have appeared around OpenBSD 7.6. It has [[https://bsd.network/@brynet/114322673716285788|featured]] [[https://old.reddit.com/r/openbsd/comments/1ixz0bn/macbook_2015/|in]] [[https://marc.info/?l=openbsd-bugs&m=173855804823166&w=2|a lot of]] [[https://marc.info/?l=openbsd-misc&m=174438934730598&w=2|discussions]], and resolving it caused so much unbridled joy that it prompted the creation of this entire wiki.
 +
  
 ===== The Symptoms ===== ===== The Symptoms =====
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   * [[:A1466]] Macbook Air ([[https://marc.info/?l=openbsd-misc&m=176103403030425&w=2|reported on misc@)]]   * [[:A1466]] Macbook Air ([[https://marc.info/?l=openbsd-misc&m=176103403030425&w=2|reported on misc@)]]
   * [[:A1465]] Early 2015 Macbook Air ([[https://marc.info/?l=openbsd-misc&m=176115553125606&w=2|reported on misc@]])   * [[:A1465]] Early 2015 Macbook Air ([[https://marc.info/?l=openbsd-misc&m=176115553125606&w=2|reported on misc@]])
 +
 +==== Lazy way to fix the ACPI bug ====
 +
 +We've prepared a custom image that contains the ACPI patch. If you trust us enough (hint: you shouldn't) then you may grab the installer and sets here:
 +
 +https://mirror.openbsdonapple.wiki/pub/OpenBSD/7.8/amd64/
  
 ==== Patch to fix the ACPI bug ==== ==== Patch to fix the ACPI bug ====