Screen Resolution

It might be possible that photOS can't detect the screen resolution correctly (black bars for all images). In such a case the screen resolution has to be configured manually.

The following commands are executed on the device, so login into it:

> ssh root@photos-xxxxxxxx
> mount -o remount,rw /boot

First check the detected resolution:

> tvservice -s

If it does not match to your screen have a look into the official Raspberry Pi documentation and select feasible values for hdmi_group and hdmi_mode. The group is related to the connected device (TV=CEA, Monitor=DMT) and the mode has to be selected depending on the mode. These two values can than be added to /boot/config.txt (e.g. TV with Full-HD at 30Hz):

.
.
.
hdmi_group=1
hdmi_mode=34

Thereafter, reboot the device:

> reboot

config.txt is located on the first partition, if you want to change it directly on the SD-Card with your computer.