article: how i fixed hibernation on my nixos machine

hmajid2301 · May 27, 2024 · 3c900c0 · 3c900c0
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diff --git a/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/index.md b/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/index.md
@@ -172,4 +172,3 @@ It wasn't the most elegant solution, but as I said earlier it works well enough
 
 ## Appendix
 - [My Hugo Blog](https://gitlab.com/hmajid2301/blog)
-- [Example source code](https://gitlab.com/hmajid2301/blog/-/tree/main/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code)
diff --git a/...ent/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/.hugo_build.lock b/...ent/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/.hugo_build.lock
diff --git a/...05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/archetypes/default.md b/...05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/archetypes/default.md
diff --git a/...dd-hugo-revealjs-to-a-hugo-site/source_code/content/slides/first-talk/_index.md b/...dd-hugo-revealjs-to-a-hugo-site/source_code/content/slides/first-talk/_index.md
diff --git a/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/go.mod b/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/go.mod
diff --git a/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/go.sum b/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/go.sum
diff --git a/...ent/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/hugo-slides.toml b/...ent/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/hugo-slides.toml
diff --git a/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/hugo.toml b/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/hugo.toml
diff --git a/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/themes/ananke b/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code/themes/ananke
diff --git a/...t/posts/2024-05-27-how-i-fixed-hibernation-on-my-nixos-machine/images/cover.png b/...t/posts/2024-05-27-how-i-fixed-hibernation-on-my-nixos-machine/images/cover.png
diff --git a/content/posts/2024-05-27-how-i-fixed-hibernation-on-my-nixos-machine/index.md b/content/posts/2024-05-27-how-i-fixed-hibernation-on-my-nixos-machine/index.md
@@ -0,0 +1,94 @@
+---
+title: "How I Fixed Hibernate on My NixOS Machine"
+date: 2024-05-27
+canonicalURL: https://haseebmajid.dev/posts/2024-05-27-how-i-fixed-hibernation-on-my-nixos-machine
+tags:
+  - hibernate
+  - drivers
+  - nixos
+cover:
+  image: images/cover.png
+---
+
+
+{{< notice type="info" title="tl:dr;" >}}
+Wi-Fi drivers were stopping the PC from suspending. I am using an Ethernet cable to connect my PC. So didn't need the
+Wi-Fi drivers. By adding them to a blocklist. I think you only need the 2nd one in the list.
+
+```nix
+{
+    boot.blacklistedKernelModules = [
+      "ath12k_pci"
+      "ath12k"
+    ];
+}
+```
+{{< /notice >}}
+
+
+Recently, I upgraded my PC to an am5 machine with an X670E Gigabyte motherboard. However, when I did this hibernate
+was left broken, alongside suspend. This gave me an idea, it wasn't to do with my hibernate setup being broken by something
+else going on.
+
+So I started debugging, looking at the systemd logs which we can use `journalctl` service. Specifically, the `journal -f`
+command to tail all the logs. Then in another terminal I ran `systemctl hibernate`
+
+```bash
+Apr 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: failed to suspend core: -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: pci_pm_freeze(): ath12k_pci_pm_suspend+0x0/0x50 [ath12k] returns -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: dpm_run_callback(): pci_pm_freeze+0x0/0xc0 returns -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: failed to freeze async: error -95
+ 22 06:06:53 workstation kernel: nvme nvme1: Shutdown timeout set to 10 seconds
+ 22 06:06:53 workstation kernel: nvme nvme1: 8/0/0 default/read/poll queues
+ 22 06:06:53 workstation kernel: nvme nvme1: Ignoring bogus Namespace Identifiers
+ 22 06:06:53 workstation kernel: PM: hibernation: Basic memory bitmaps freed
+ 22 06:06:53 workstation kernel: OOM killer enabled.
+ 22 06:06:53 workstation kernel: Restarting tasks ... done.
+ 22 06:06:53 workstation kernel: PM: hibernation: hibernation exit
+ 22 06:06:53 workstation systemd-sleep[11861]: Failed to put system to sleep. System resumed again: Operation not supported
+ 22 06:06:53 workstation systemd[1]: systemd-hibernate.service: Main process exited, code=exited, status=1/FAILURE
+ 22 06:06:53 workstation systemd[1]: systemd-hibernate.service: Failed with result 'exit-code'.
+ 22 06:06:53 workstation systemd[1]: Failed to start System Hibernate.
+ 22 06:06:53 workstation systemd[1]: Dependency failed for System Hibernation.
+ 22 06:06:53 workstation systemd[1]: hibernate.target: Job hibernate.target/start failed with result 'dependency'.
+```
+
+These logs provide us with a bunch of useful information, we can see that the hibernate job failed.
+
+```bash
+ 22 06:06:53 workstation kernel: PM: hibernation: Basic memory bitmaps freed
+ 22 06:06:53 workstation kernel: OOM killer enabled.
+ 22 06:06:53 workstation kernel: Restarting tasks ... done.
+ 22 06:06:53 workstation kernel: PM: hibernation: hibernation exit
+ 22 06:06:53 workstation systemd-sleep[11861]: Failed to put system to sleep. System resumed again: Operation not supported
+ 22 06:06:53 workstation systemd[1]: systemd-hibernate.service: Main process exited, code=exited, status=1/FAILURE
+ 22 06:06:53 workstation systemd[1]: systemd-hibernate.service: Failed with result 'exit-code'.
+ 22 06:06:53 workstation systemd[1]: Failed to start System Hibernate.
+ 22 06:06:53 workstation systemd[1]: Dependency failed for System Hibernation.
+ 22 06:06:53 workstation systemd[1]: hibernate.target: Job hibernate.target/start failed with result 'dependency'.
+```
+
+However, I could not find an exact reason within the job itself. After trying numerous random things, I looked closer
+at the logs above and noticed the mention of the Wi-Fi drivers `ath12k_pci` failing to suspend.
+
+```bash
+Apr 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: failed to suspend core: -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: pci_pm_freeze(): ath12k_pci_pm_suspend+0x0/0x50 [ath12k] returns -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: dpm_run_callback(): pci_pm_freeze+0x0/0xc0 returns -95
+ 22 06:06:53 workstation kernel: ath12k_pci 0000:0f:00.0: PM: failed to freeze async: error -95
+```
+
+This then gave me the idea to try to add the drivers to the blocklist and see if that resolves the issue. Like so:
+
+
+```nix
+{
+    boot.blacklistedKernelModules = [
+      "ath12k_pci"
+      "ath12k"
+    ];
+}
+```
+
+That's it! Hibernate and suspend are now working. Of course, the downside now for my desktop I cannot use the Wi-Fi
+built into my motherboard. But that's an issue for another day, currently I have it connected via an Ethernet cable.
diff --git a/flake.lock b/flake.lock
diff --git a/hugo.toml b/hugo.toml
@@ -8,6 +8,12 @@ buildExpired = false
 enableEmoji = true
 ignorefiles = ["content/slides"]
 
+[[module.mounts]]
+source = "content/posts"
+target = "content/posts"
+excludeFiles = "source_code/*"
+
+
 [markup.highlight]
 noclasses = false
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Expand Up		@@ -172,4 +172,3 @@ It wasn't the most elegant solution, but as I said earlier it works well enough

		## Appendix
		- [My Hugo Blog](https://gitlab.com/hmajid2301/blog)
		- [Example source code](https://gitlab.com/hmajid2301/blog/-/tree/main/content/posts/2024-05-26-how-to-add-hugo-revealjs-to-a-hugo-site/source_code)