The Latest Solus OS update using the latest kernel com.solus-project.current.5.11.16-178 seems to of fixed things me. : )
No crashes at all since the update.
Thanks to those responsible for fixing things.

I found this https://www.linuxfromscratch.org/blfs/view/svn/x/x7driver.html#xorg-intel-driver
I did noticed this remark

Is there anything we can do to produce more detailed or helpful logs for you ?

Is anything happening or in the pipeline with this issue?
Reading the forum it clearly does not affect everyone.
I am not sure what is causing this issue for me and a few others to varying degrees of severity.
Just to be clear my Laptop does the following.
The system will randomly switch to the log on screen.
All app's and open windows in the session are closed when logging back in.
or It goes to the black screen with no pointer or blinking cursor & I need to do a force power off and recover as described in the previous posts.

@DataDrake No issues at all with Old kernel so it appears something is incompatible with the newer 5.11 kernel.

@szb Your welcome I am glad you got it sorted.

@szb Sorry for the late reply. I used this guide https://getsol.us/articles/troubleshooting/boot-rescue/en/

@DataDrake On reboot I was faced with the black screen with no prompt etc so I had to do a chroot from solus live usb and re install the xorg-driver-video-intel. So definitely not a fix LOL unless re installing the driver fixes things. I will let you know if the crashes continue.

@DataDrake EDIT: I removed the driver using the software center and will let you know if the crashes continue.

Hope this helps as I think it captured an error. For info I have a i5 processor too.