Difference between revisions of "PinePhone FAQ"

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(→‎How can I turn on the backlight?: Clarified the intro, fixes)
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==== How can I turn on the backlight? ====
==== How can I turn on the backlight? ====


When the brightness setting is too low, the backlight turns off completely. At which point this happens requires calibration. It also depends on whether the pinephone is connected to a charger or not, due to how the backlight is physically regulated. The backlight can be turned on by increasing the brightness setting. If the brightness setting is too low but non-zero, as can happen when using a gui slider, try connecting the phone to a charger.
On some devices the default calibration of the backlight is not sufficient and the minimum setting of the brightness of the used OS can be too low, causing the backlight to completely shut down. In that case it is recommended to connect the phone to a charger and/or to shine a flashlight at the screen to adjust the brightness to a higher setting again.


On most systems the brightness setting is an integer between 0 and 1000 and available at runtime in /sys/class/backlight/backlight/brightness and stored at shutdown and loaded at boot from /var/lib/systemd/backlight/platform-backlight:backlight:backlight by systemd-backlight@backlight:backlight.service. Changing the brightness setting can be done at runtime, for example over SSH, by executing as root <code>echo 500 > /sys/class/backlight/backlight/brightness</code>. The stored brightness setting can be modified using another system, by mounting at $mnt the root filesystem of the system you want to fix and executing <code>echo 500 > $mnt/var/lib/systemd/backlight/platform-backlight\:backlight\:backlight</code>.
On many Linux OSes the brightness setting is an integer between 0 and 1000 and available at runtime in /sys/class/backlight/backlight/brightness and stored at shutdown and loaded at boot from /var/lib/systemd/backlight/platform-backlight:backlight:backlight by systemd-backlight@backlight:backlight.service. Changing the brightness setting can be done at runtime, for example over SSH, by executing as root <code>echo 500 > /sys/class/backlight/backlight/brightness</code>. The stored brightness setting can be modified using another system, by mounting the root filesystem of the system you want to fix and by executing <code>echo 500 > [MOUNT LOCATION]/var/lib/systemd/backlight/platform-backlight\:backlight\:backlight</code>.


=== SMS ===
=== SMS ===
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