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!Systemd: slow reboot and shutdown fixed

June 2022 · 2 minute read

Posted in:  linux systemd manjaro 



I noticed long delays (more than 2 minutes) on reboots and poweroffs recently
on my Manjaro laptop.

## Fix the slow shutdown/reboot

View the last boot session log in reverse order

```console
$ journalctl -rb -1
```

and inspect that for abnormalities. Also look at your console when rebooting or
shutting down the system, as that may also present some good starting points.

**To make things short, here's my solution that I currently work with:**

I edited `/etc/systemd/system.conf` and changed the following values:

```ini
# file: "/etc/systemd/system.conf"
[Manager]
[...]
RebootWatchdogSec=1min
ShutdownWatchdogSec=1min
[...]
DefaultTimeoutStopSec=5s
[...]
```

## Have a quick look at the boot time

```console
$ systemd-analyze
```

and if you are more interested into which module slows down your boot, list them
with:

```console
$ systemd-analyze blame
```

Just out of curiosity I also used:

```console
$ sudo systemctl disable NetworkManager-wait-online.service
```

→ revert that with:

```console
$ sudo systemctl enable NetworkManager-wait-online.service
```

## Sources

The sources of my research and a more detailed explanation can be found
with those links:

- <https://itsfoss.com/check-boot-time-linux/>
- <https://itsfoss.com/long-shutdown-linux/>

## Update and Results on my Fedora box

Since I made the switch to Fedora 36 I had to re-do those steps.

With default values I got this result for `systemd-analyze`

```console
$ systemd-analyze
Startup finished in 7.754s (firmware) + 5.988s (loader) + 1.140s (kernel) + 13.027s (initrd) + 1min 21.493s (userspace) = 1min 49.403s
graphical.target reached after 1min 21.462s in userspace
```

Without userspace: <span style="border-bottom: 3px double;">27.9090s</span>

And with the changes above I get this

```console
$ systemd-analyze
Startup finished in 10.151s (firmware) + 2.368s (loader) + 1.128s (kernel) + 10.509s (initrd) + 8.480s (userspace) = 32.639s
graphical.target reached after 8.450s in userspace
```

Without userspace: <span style="border-bottom: 3px double;">24.1560s</span>


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