Extra info:
In grub "nomodeset" is added to the kernel command line, without the MBP does not boot and seems to hang in initrd. It seems that something goes wrong within the radeon driver. With nomodeset set KMS is skipped and the radeon driver (GPU X1600) is used, Wayland isn't run, but xorg-server is run instead.
The reported logs apply to running with nomodeset, maybe on resume it still tries to load radeon.
A fix that would allow using the radeon driver with KMS (and run Wayland on top of that) might also fix the resume issue.
Extra info:
In grub "nomodeset" is added to the kernel command line, without the MBP does not boot and seems to hang in initrd. It seems that something goes wrong within the radeon driver. With nomodeset set KMS is skipped and the radeon driver (GPU X1600) is used, Wayland isn't run, but xorg-server is run instead.
The reported logs apply to running with nomodeset, maybe on resume it still tries to load radeon.
A fix that would allow using the radeon driver with KMS (and run Wayland on top of that) might also fix the resume issue.