According to the AMT Reference Guide, the AMT 9.0 supports up to 2K resolution
Does the AMT 10 or AMT 11 support 4K resolution?
We do not support anything above 2560X1600. You will need to reduce the resolution for KVM. The document should make it clear that it is 2K for Release 9 and above. (so this is true for release 10 and 11)
Thank you very much for the quick answer!