Difference between revisions of "Pinebook Pro"

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(Improve grammar. Also systemd services do not need to be made executable.)
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$ sudo nvme set-feature /dev/nvme0 -f 2 -v 2 -s
$ sudo nvme set-feature /dev/nvme0 -f 2 -v 2 -s
set-feature:02 (Power Management), value:0x000002</pre>
set-feature:02 (Power Management), value:0x000002</pre>
Some NVMe SSDs don't appear to allow saving the setting with "-s" option. In those cases, leave off the "-s" and use a startup script to set the non-default power state at boot.<br>
Some NVMe SSDs don't appear to allow saving the setting with "-s" option. In those cases, leave off the "-s" and use a startup script to set the non-default power state at boot.<br>
If you want to test performance without saving the new power setting semi-permanantly, then leave off the "-s" option.<br/>
If you want to test performance without saving the new power setting semi-permanantly, then leave off the "-s" option.<br/>
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On Manjaro, the best way to script a non-defaut power state for an NVME that doesn't allow saving it - and also uses APST, see below - is to create a systemd service by creating a file called i.e. nvme-throttle.service in /etc/systemd/system and make it executable.<br/>
 
This file would contain : <br/>
On systemd based distros like Manjaro, a non-defaut power state for an NVME can be set using a systemd service. This is useful in cases where the NVME drive does not save the power state and/or uses APST.
<pre>[Unit]
 
An example systemd service, nvme-throttle.service, is shown below:
 
<pre>
[Unit]
Description=Throttles NVME to lesss power hungry mode
Description=Throttles NVME to lesss power hungry mode
After=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target
After=suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target
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[Install]
[Install]
WantedBy=multi-user.target suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target</pre>
WantedBy=multi-user.target suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target
</pre>
 
Here the value after "-v" is the maximum power state that you want your SSD to use.<br/>
Here the value after "-v" is the maximum power state that you want your SSD to use.<br/>
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This will be executed at system startup, and every time your system exits any suspend mode that might reset the SSD to default values.<br/><br/>
This will be executed at system startup, and every time your system exits any suspend mode that might reset the SSD to default values.<br/><br/>
Once this file is created and made executable, you just need to : <br/>
 
<pre>systemctl daemon-reload
This file needs to be placed in the /etc/systemd/system directory. Afterwards, to activate the service, run: <br/>
systemctl enable --now nvme-throttle.service</pre>
 
And that's it !
<pre>
systemctl daemon-reload
systemctl enable --now nvme-throttle.service
</pre>


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