Ok, turns out it only works on some Intel based laptops. But for them this is still an improvement so I vote for this patch to be keept, as it has no downsides for other devices.
e.g. The Clevo NS50MU Barebone with an i7-1165G7 only outputs 4k@30Hz without this patch, but 4k@60Hz with YCbCr420 with this patch. Accoring to the spec sheet of the CPU it should be possible to output 4k@60Hz without relying on YCbCr420, but for some reasons this fails. (Didn't check on Windows). The Clevo L140CU with an i5-10210U cannot output 4k@60Hz with Chroma subsampling. The spec sheet does not give clear indication whether the CPU supports HDMI 1.4 or 2.0, but it does support 4k@30Hz which should be roughly the same bandwith requirement as 4k@60Hz with chroma subsampling. So i don't know where exactly this fails yet. TL;DR: Works on Clevo NS50MU, does not work on Clevo L140CU, but also has no negative effect on it -> Patch is still an improvent. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934489 Title: Make Intel GPUs choose YCbCr420 encoding automatically when required for 4k 60Hz output To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934489/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
