Question Resolution issue with AMD RX 6950 XT

[AZ Desert Rat]

Upgraded system. Running an Asus Maximus Apex Z790 with a 13700K and current bios. Replaced a 1080ti with an AMD RX 6950 XT graphics card. Dual boot Win 11 and Linux Mint 22 with latest kernel. Neither OS will allow me to set resolution to higher than 1920x1080 for an LG OLEDC1 TV/monitor. I am attached via an IOGear GCS1964 KVM. The other two computers connected through the KVM, one with a 2080 and the other a 3090ti, allow 4096x2160 resolution. Checked drivers and am running latest drivers for the 6950.

 

[Lutfij]

Upgraded system.
+
Replaced a 1080ti with an AMD RX 6950 XT graphics card
On your Windows 11 OS, use DDU to remove all GPU drivers(Intel, Nvidia and AMD) in Safe Mode, then manually reinstall with the latest GPU driver sourced from AMD's support site, in an elevated command, i.e, Right click installer>Run as Administrator.

 

[AZ Desert Rat]

Upgraded System
Replaced a 1080ti with an AMD RX 6950 XT graphics card
On your Windows 11 OS, use DDU to remove all GPU drivers(Intel, Nvidia and AMD) in Safe Mode, then manually reinstall with the latest GPU driver sourced from AMD's support site, in an elevated command, i.e, Right click installer>Run as Administrator.

Tried this and it didn't work. TV/monitor is an LG OLED48C1 but is showing as an HDMI EDID_S0. The max resolution available is 1920x1080.