Dear Kai-Heng, I'm not quite sure what you actually want me to try ... but Kernel 5.12-rc8 with "nomodeset" & without "amdgpu.ip_block_mask=0xfffffdff" gives:
- amdgpu kernel module not loaded, Xorg amdgpu driver not loaded
- Xorg vesa driver loaded & no acceleration => high CPU load
- suspend seems ok but fails on resume (display does not wake up)
- hibernation/resume ok
So, the result is similar to what I reported in scenario 1) of my comment #5
Dear Kai-Heng, I'm not quite sure what you actually want me to try ... but Kernel 5.12-rc8 with "nomodeset" & without "amdgpu. ip_block_ mask=0xfffffdff " gives:
- amdgpu kernel module not loaded, Xorg amdgpu driver not loaded
- Xorg vesa driver loaded & no acceleration => high CPU load
- suspend seems ok but fails on resume (display does not wake up)
- hibernation/resume ok
So, the result is similar to what I reported in scenario 1) of my comment #5