This on Ubuntu 23.04 and 6.2.0-26-generic, but since the previous firmware worked I assume that the kernel version is not important here and it more is that the 1.4 update contains a firmware for the rx7900xtx that hangs it. Also booting to recovery and trying to enter graphical mode (when the borked firmware was installed) also borked the system while the non-graphical recovery mode worked just fine.
This on Ubuntu 23.04 and 6.2.0-26-generic, but since the previous firmware worked I assume that the kernel version is not important here and it more is that the 1.4 update contains a firmware for the rx7900xtx that hangs it. Also booting to recovery and trying to enter graphical mode (when the borked firmware was installed) also borked the system while the non-graphical recovery mode worked just fine.