Differences

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--- misc:acpi_patch [2025/06/28 22:17] – tweaks 92.40.32.213
+++ misc:acpi_patch [2025/12/13 12:10] (current) – rqm
@@ Line 1: / Line 1: @@
 ====== 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.
 ===== The Symptoms =====
@@ Line 14: / Line 27: @@
 ===== Affected Models =====
   * [[:A1502]] Early 2015 Macbook Pro
-  * Maybe others?
+  * [[: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@]])
+==== 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 ====
-<code>
+**Download links:**
-Index: sys/dev/acpi/acpi.c
+  * For OpenBSD 7.7 {{ :misc:macbook-acpi-patch-77.tar.gz |macbook-acpi-patch-77.tar.gz}}
-===================================================================
+  * For OpenBSD 7.8 {{ :misc:macbook-acpi-patch-78.tar.gz |macbook-acpi-patch-78.tar.gz}}
-RCS file: /cvs/src/sys/dev/acpi/acpi.c,v
-diff -u -p -u -r1.444 acpi.c
---- sys/dev/acpi/acpi.c	24 Mar 2025 09:53:20 -0000	1.444
-+++ sys/dev/acpi/acpi.c	20 Apr 2025 19:45:13 -0000
-@@ -823,8 +823,8 @@ acpi_pci_set_powerstate(pci_chipset_tag_
- 	}
- #endif /* NACPIPWRRES > 0 */
--	if (state == ACPI_STATE_D0 && pre)
--		aml_evalname(sc, pdev->node, "_PS0", 0, NULL, NULL);
-+//	if (state == ACPI_STATE_D0 && pre)
-+//		aml_evalname(sc, pdev->node, "_PS0", 0, NULL, NULL);
- }
- int
-</code>
 ==== How to patch ====
@@ Line 159: / Line 163: @@
 Now we have:
-- The latest update files stored away safely
+  * The latest update files stored away safely
-- The latest kernel, compiled with our own patch
+  * The latest kernel, compiled with our own patch
 So it is time to move on to the installation.
@@ Line 177: / Line 181: @@
 # cp /usr/obj/sys/arch/amd64/compile/GENERIC.MP/bsd.gdb /nbsd && mv /nbsd /bsd
 # cp bsd.rd /
-# cp bsd /bsd.sp # You might not even have this file, relatively safe to skip this last one
+# cp bsd /bsd.sp # You might not even have this file, relatively safe to skip this last one if you do not intend to run in single-processor mode
 </code>