The problem I reported here was NOT fixed by the latest kernel update (5.4.0-71).
To clarify what I observe on my AMD-based desktop:
The suspend/hibernation/resume problem seems to be strictly related to the amdgpu kernel module and possibly also amdgpu Xorg driver. I have tested the following scenarios.
1) kernel 5.4.0-71 with ACP enabled:
- Xorg vesa driver loaded & no acceleration
- suspend seems ok but fails on resume
- hibernation/resume ok
2) kernel 5.4.0-71 with ACP disabled:
- Xorg amdgpu driver loaded & acceleration working
- suspend/resume ok
- hibernation fails
3) kernel 5.8.0-49 with ACP disabled:
- Xorg amdgpu driver loaded & acceleration working
- suspend/resume ok
- hibernation fails
4) kernel 5.8.0-49 with ACP enabled:
- I only get black screen - Xorg fails to start?
- suspend/hibernation not tested
I have no problems with hibernation/suspend/resume on any of my Intel-based laptops. I also have no problem on most of my older AMD-based desktops.
The problem I reported here was NOT fixed by the latest kernel update (5.4.0-71).
To clarify what I observe on my AMD-based desktop: hibernation/ resume problem seems to be strictly related to the amdgpu kernel module and possibly also amdgpu Xorg driver. I have tested the following scenarios.
The suspend/
1) kernel 5.4.0-71 with ACP enabled:
- Xorg vesa driver loaded & no acceleration
- suspend seems ok but fails on resume
- hibernation/resume ok
2) kernel 5.4.0-71 with ACP disabled:
- Xorg amdgpu driver loaded & acceleration working
- suspend/resume ok
- hibernation fails
3) kernel 5.8.0-49 with ACP disabled:
- Xorg amdgpu driver loaded & acceleration working
- suspend/resume ok
- hibernation fails
4) kernel 5.8.0-49 with ACP enabled:
- I only get black screen - Xorg fails to start?
- suspend/hibernation not tested
I have no problems with hibernation/ suspend/ resume on any of my Intel-based laptops. I also have no problem on most of my older AMD-based desktops.