I can confirm this bug an add the following information:
Kernel 5.15.0-116-generic: VBox 6.1.50 is not working at all
Kernel 5.15.0-112-generic and 5.15.0-113-generic: VBox 6.1.50 is working with boot workaround amg_iommu=off due to the bug in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2068738
Kernel 5.15.0-107-generic: VBox 6.1.50 is working without problems
It looks like, that another kernel patch between -112/-113 and -116 causes the issue with VBox 6.1.50
Regards, Bernd
I can confirm this bug an add the following information:
Kernel 5.15.0-116-generic: VBox 6.1.50 is not working at all
Kernel 5.15.0-112-generic and 5.15.0-113-generic: VBox 6.1.50 is working with boot workaround amg_iommu=off due to the bug in https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/2068738
Kernel 5.15.0-107-generic: VBox 6.1.50 is working without problems
It looks like, that another kernel patch between -112/-113 and -116 causes the issue with VBox 6.1.50
Regards,
Bernd