A version of Ubuntu for the Raspberry Pi was recently released, and we will also test that
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fledged PC. I have long wanted a 100% silent and low-power computer to use as a media center and “typewriter.” Using the power-consuming 500W Core I7 desktop PC just to type this text seems a bit redundant for me, at least in terms of reducing the energy footprint. (I don’t care about the electricity bill; I care about the environment.) I tried using Samsung DeX as a desktop, and the experience was generally very positive — for typing and watching videos on the big screen, my Samsung Galaxy S10 is powerful enough. But the Android software that can work in desktop mode is limited, and not every website displays correctly using Android in desktop mode with a mouse. And DeX is still Android, with many limitations of the smartphone-based operating system. Linux is another matter — complete freedom in terms of SSH access, installing any libraries, components, a fully functional terminal, USB, GPIO, and hardware support. Sounds promising. Let’s see how it works.
Before we get started, an important note: To fully use the Raspberry Pi as a desktop, good cooling is required. I wanted to have a 100% fanless PC, so I bought this case:
Source: The case works well in terms of heat dissipation. Even with a high load, there was no overheating or system freezing. The case temperature did not exceed 50 degrees Celsius, even during stress tests.
Image courtesy of the author
But first, let’s start with the standard Raspbian, which has been familiar to DIY enthusiasts for many years.
Part I: Raspbian
Before we start, let me remind you of the Raspberry Pi 4 specs. The Raspberry Pi 400 has similar capabilities, so almost everything described below is also true for it.
CPU Quad Core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
2, 4, or 8GB LPDDR4–3200 SDRAM memory
Wi-Fi 2.4/5.0 GHz, Bluetooth 5.0, BLE
Gigabit Ethernet port
2 USB 3.0 ports; 2 USB 2.0 ports
Support for two monitors, micro-HDMI connectors (up to 4kp60 resolution)
Support of H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
According to the description, everything looks fine. But the very first launch showed that the system works slowly. The solution is simple: The processor frequency needs to be increased. By default, the OS works in a low-power mode — the Raspberry Pi comes with no heatsink at all, and at high computing power mode, the CPU will simply overheat.