Raspberry Pi 2 and Pi 3 keep full resolution when the TV turns off and on

If the TV on a Raspberry Pi 2, or on a Raspberry Pi 3 running the 32-bit image, switched itself off and on, for example on a power schedule, the picture could come back at 1024x768 and stay there until someone power-cycled the Pi.

From Anthias 2026.07.1, the viewer watches the Pi's HDMI ports. When a display reconnects, it sets the resolution back to the one the display reports as its preferred mode, so any panel size works, and restarts the viewer once so content is drawn at that size. Expect a short gap in playback when the TV wakes up.

It waits 5 seconds after the display reconnects before it does this. To change that, set ANTHIAS_HOTPLUG_SETTLE_SECONDS on the viewer container.

The same release fixes a related case on these boards: a Pi that started with no display connected could keep waiting for one after you plugged it in. The viewer container now restarts when a display appears and starts showing content.

It checks the HDMI connection every 3 seconds, so a TV that switches off and on again faster than that can be missed, and a receiver or HDMI switch that keeps the connection up while the TV is off hides the change. Only the pi2 and pi3 images run this. On the 64-bit images the viewer keeps control of the display mode itself, and on a 64-bit Raspberry Pi 3 the picture stayed at 1920x1080 through an HDMI unplug in testing.