Support: Cm2 Dongle

dtoverlay=disable-bt # optional, frees up UART if needed hdmi_force_hotplug=1 hdmi_group=2 hdmi_mode=16 # 1080p 60Hz, change as needed The hdmi_force_hotplug=1 is the key—it tells the GPU to output HDMI even if no display is detected at boot.

If you still get no HDMI, SSH into the Compute Module (or edit the SD card/eMMC boot partition) and add these lines to config.txt : cm2 dongle support

Have a C2M dongle success story or a tricky setup? Drop a comment below—especially if you’ve tested it with a CM5 or a non-Raspberry Pi module like the Orange Pi CM4. dtoverlay=disable-bt # optional, frees up UART if needed

Here’s a helpful, practical blog post aimed at makers, retro-computing enthusiasts, or single-board computer (SBC) users. C2M Dongle Support: What It Is, Why You Need It, and How to Get It Working Here’s a helpful, practical blog post aimed at

If you’ve ever bought a modern laptop (especially a MacBook or ultra-thin PC), you’re no stranger to dongles. But there’s a specific, often-confusing term floating around in forums and product specs: C2M dongle support .

Happy making, and may your dongle always be detected.

Let’s break down what C2M support means, why your dongle might not be working, and how to fix it.