To my understanding it’s not fixed yet at least on kernel. I don’t know exactly what causes it, but there have been multiple causes for it. The one I have is very rare, but causes a full lockup with no tty access. No matter the distro. The fix was to disable C6.
It could be a bios issue too, since not many have it. The only way to reproduce it consistently is to spike the CPU to full load and then remove the load. There are no logs, which make finding the issue even harder, but otherwise that fix works and I don’t have enough knowledge to even tackle it.
On Linux, there are issues with C states on AMD chips so they are not getting a free pass either.
Not any more unless you are running Ubuntu 18.04.
To my understanding it’s not fixed yet at least on kernel. I don’t know exactly what causes it, but there have been multiple causes for it. The one I have is very rare, but causes a full lockup with no tty access. No matter the distro. The fix was to disable C6.
I am running a notebook with AMD 5300U and a desktop with 5900x and none has problems with sleep.
It could be a bios issue too, since not many have it. The only way to reproduce it consistently is to spike the CPU to full load and then remove the load. There are no logs, which make finding the issue even harder, but otherwise that fix works and I don’t have enough knowledge to even tackle it.