Hibernation works fine. Add "Resume from Hibernate has the wrong time"

content/pages/2024-04-04-1712257725.md

@@ -6,7 +6,7 @@ draft: false
 
 I have installed Arch Linux on a Microsoft Surface Book 3 to use as my "focus" machine. This page outlines some things I've had to install and tweak.
 
-Most everything [works out of the box](https://github.com/linux-surface/linux-surface/wiki/Supported-Devices-and-Features#surface-books-and-surface-laptop-studio) except the cameras, which I've disabled in the BIOS. Suspend only supports [ACPI state 0 Suspend-To-Idle](https://www.kernel.org/doc/Documentation/power/states.txt) and eats up 20%+ of the battery life overnight. [Resume from Hibernate has keyboard issues](#resume-from-hibernate-has-keyboard-issues).
+Most everything [works out of the box](https://github.com/linux-surface/linux-surface/wiki/Supported-Devices-and-Features#surface-books-and-surface-laptop-studio) except the cameras, which I've disabled in the BIOS. Suspend only supports [ACPI state 0 Suspend-To-Idle](https://www.kernel.org/doc/Documentation/power/states.txt) and eats up 20%+ of the battery life overnight, but as of kernel 6.9.9-arch1-1-surface I have not had issues with Hibernation.
 
 This is *not* a recommended laptop for running Linux.
 
@@ -115,8 +115,44 @@ Appears to be an issue with the dock and using a USBC to Display Port cable.
 
 Unplugging the power cable (which connects to the dock) seems to help get the external screen displaying again. Annoying workaround.
 
-### Resume from Hibernate has keyboard issues
+### Resume from Hibernate has the wrong time
 
-Tracking the issue: https://github.com/linux-surface/linux-surface/issues/1412
+Resume from Hibernate suffers from clock drift so has the wrong time.
 
-The system Hibernates fine. Resume from Hibernate seems to work except some keys on the keyboard (both USB keyboard and built-in keyboard) didn't work on the one test I did. Was able to SSH into the laptop and reboot it from there.
+To resolve this, I set up a systemd service that runs a time synchronization command when the system wakes up. Here's a step-by-step approach to implement this.
+
+First, make sure you have the systemd-timesyncd service enabled and running. This is the default time synchronization daemon for Arch Linux. If it's not already enabled, you can enable it with:
+```
+sudo systemctl enable --now systemd-timesyncd.service
+```
+
+Create a new systemd service file:
+```
+sudo vi /etc/systemd/system/fix-time-on-resume.service
+```
+
+Add the following content to the file:
+```
+[Unit]
+Description=Fix system time on resume from hibernate
+After=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/systemctl restart systemd-timesyncd.service
+
+[Install]
+WantedBy=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target
+```
+
+Reload the systemd daemon to recognize the new service:
+```
+sudo systemctl daemon-reload
+```
+
+Enable the new service:
+```
+sudo systemctl enable fix-time-on-resume.service
+```
+
+This service automatically restarts the systemd-timesyncd service when your system resumes from hibernation, which corrects the time.