| From: Evan Leibovitch via talk <talk@gtalug.org> | I have a | Radeon RX 550 that is struggling to drive two 4K screens. It works, but | plenty of flickering under both Linux and Windows. Back to your original problem. I find vieo problems hard to diagnose. That's because the whole stack is complex and non-intuitive. Several layers are willing to lie to others. But, it might be worth a shot figuring out your problem. We all might learn something. What *exactly* do you mean by flickering? Do both screens flicker at the same time? What loads cause flickering to happen? Do they only flicker when you are loading both down? If you force the monitors to a reduced resolution does the flicker go away? Why do I ask? - I hypothesize that some flickering is caused by a small mismatch between refresh rates (eg. 59.5 hz vs 60). I don't know this for sure. Some video cards have fewer clocks to drive outputs than outputs. This forces some monitors to use the same clock. - some kinds might reflect a bandwidth limitation between the frame buffer and the video port. This has nothing to do with how many compute units the GPU has. - some kinds might reflect a lack of power in the compute capabilities or the built in CODECs. --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk