I too experienced a similar issue. It's the first time I had to do a rollback. I think it was related to nvidia drivers as well. However, when gathering some info, I noticed that for some reason, at some point, the system updated the nvidia drivers to the current version instead of the 390.x series which actually supports the card in my system.
I noticed it when I ran inxi -Gz
Graphics: Device-1: Intel 3rd Gen Core processor Graphics driver: i915 v: kernel
Device-2: NVIDIA GK107GLM [Quadro K1000M] driver: nvidia v: 455.45.01
Device-3: Acer ThinkPad Integrated Camera type: USB driver: uvcvideo
Display: x11 server: X.Org 1.20.10 driver: modesetting,nvidia resolution: 1920x1080~60Hz
OpenGL: renderer: Quadro K1000M/PCIe/SSE2 v: 4.6.0 NVIDIA 455.45.01
So after the rollback I "downgraded" the drivers.
sudo eopkg install nvidia-390-glx-driver-current nvidia-390-glx-driver-32bit
After that I ran the full upgrade again sudo eopkg upgrade -y
, then I rebooted, and voila! It's working properly again. I'm not sure when the system decided to upgrade the nvidia drivers, and strangely the system kept working until that last upgrade...anyway, it's good now. Maybe you need to do something similar?
Graphics: Device-1: Intel 3rd Gen Core processor Graphics driver: i915 v: kernel
Device-2: NVIDIA GK107GLM [Quadro K1000M] driver: nvidia v: 390.141
Device-3: Acer ThinkPad Integrated Camera type: USB driver: uvcvideo
Display: x11 server: X.Org 1.20.10 driver: modesetting,nvidia resolution: 1920x1080~60Hz
OpenGL: renderer: Quadro K1000M/PCIe/SSE2 v: 4.6.0 NVIDIA 390.141
[Edit] Maybe it might be to run doflicky-ui
(Hardware Drivers) and see what version it's suggesting?