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terrible UI performance, basically unusable, very laggy, freezes
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Description

System Information
Operating system: Ubuntu Cosmic, Linux 4.18.0-11-generic
Graphics card: Intel UHD Graphics 620; Wayland (not X11)

Blender Version
Broken: 2.80-26d5a3625ed
Worked: (optional) Not sure. Where can I find builds for 1,2,3 months ago to test?

Short description of error

Every now and then, the whole machine freezes for 1-3 seconds. Even the mouse cannot move. This is with basically nothing to render. It happens with the default cube. It freezes if I try to open a menu (e.g., Add menu).

Exact steps for others to reproduce the error
It should be very easy to reproduce. I can record of video of my session if that would be helpful. Let me know.

Event Timeline

I don't have any freezes with X11. As far I know, Wayland is not officially supported.
Do the freezes happen only when you open a menu? Or also when panning the camera, or simply doing nothing?
It would be great to know if this is a new problem since 2.79.

Where can I find builds for 1,2,3 months ago to test?

You can go to the release notes of a particular version (eg. https://www.blender.org/download/releases/2-76/ ) and then click "Old Version", to the right of "Get Latest Blender".

Do the freezes happen only when you open a menu? Or also when panning the camera, or simply doing nothing?

It seems to happen whenever I interact with Blender. If I leave it open but just browse the web and ignore Blender then nothing bad happens.

It would be great to know if this is a new problem since 2.79.

Version 2.79 hash 5bd8ac9abfa works fine.

You can go to the release notes of a particular version (eg. https://www.blender.org/download/releases/2-76/ ) and then click "Old Version", to the right of "Get Latest Blender".

What about earlier builds of 2.80-to-be? Are those available somewhere?

I don't have any freezes with X11. As far I know, Wayland is not officially supported.

The freezes happen on X11 too.

ps -Af |grep Xorg
joshua 1121 1118 2 19:41 tty2 00:00:06 /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -noreset -keeptty -verbose 3