https://blog.berezovskyi.dev/tags/amdgpu/Recent content in Amdgpu on berezovskyi notesHugoen-usSat, 12 Sep 2026 00:00:00 +0000https://blog.berezovskyi.dev/notes/hdmi21-pcon-gamescope-hyperhdr/Sat, 12 Sep 2026 00:00:00 +0000https://blog.berezovskyi.dev/notes/hdmi21-pcon-gamescope-hyperhdr/<h2 id="the-goal">The Goal</h2> <p>The TV in my living room is an LG OLED65C5: 4K at 120 Hz, VRR, ALLM. The gaming PC that drives it is the one from the <a href="https://blog.berezovskyi.dev/notes/linux-multi-seat-gaming-part-1/">Linux Multi-Seat Gaming series</a> - a Radeon RX 9070 XT running Steam Big Picture in a dedicated gamescope session, started and stopped as a systemd user unit (<a href="https://blog.berezovskyi.dev/notes/linux-multi-seat-gaming-part-3/">Part 3</a> is where that design settled, seats and all). The session script has asked for <code>-r 120 --adaptive-sync</code> since Part 1. The TV had been quietly giving me 4K60 with no variable refresh the whole time.</p>