Operating system: Linux Mint 18.3, MATE
Graphics card: can't actually find the exact model right now, it's Radeon 6xxxM
Broken: 2.80, 7c438e55366b2, 2018-12-28
Worked: sa far as I understand this gap to fill - 2.79 official releases worked as smoothly as the hardware allowed it to.
Blender and a very desktop environment lag heavily when B3D is in Object Mode
1 - I start with a basic scene with the cube
2 - i tweak its dimensions in edit mode, cut it with loop-cut a few times so the mesh is a bit more complex
3 - go back to object mode.
Actually Blender acts like it filled up whole RAM and then the system starts to use SWAP partition, while it's not SSD ;) but it's not it, there's still plenty of free RAM. Every 3d viewport click, every view turn, every tiny action with Blender is click-and-wait battle. Such action needs about 10-20s, then again a second of smoothness and another 10-20s of waiting.
I didn't find any solution on the Internet yet, so I might be one of the few with the issue.
Picture of the 'complex' mesh in the attachment.
Thank you in advance for your time and your hard work. Cheers!