2.80 freezes on material tab #71293
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Reference: blender/blender#71293
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System Information
Operating system: Windows 10 Home 1903
Graphics card: NVIDIA GTX650 (current driver: 436.48)
CPU: Intel Core i5-4440
RAM: 8 Gb
Blender Version
Broken: 2.80.75
Worked: 2.79
Short description of error
While the preview of material tab is opened and I'm trying to operate with viewport (selecting, rotating or translating an object, move or zoom viewport camera), the program freezes for a second after every action. If I close the preview, the behaviour backs to it's normal state. There is no dependency between difficulty of the material: it's the same lagging on simple materials only with solid colors as well as complex materials with textures.
I've already tried to reinstall various versions of drivers for the videocard, but nothing happens.
This problem only appears on Windows. On macOS 10.13.6 on this hardware I can't reproduce it.
Exact steps for others to reproduce the error
Try to select another object in viewport or in outliner, after that move / rotate / zoom the viewport camera right away.
Attached files
KiaCeed.blend blender_system_info.txt blender_debug_output.txt
Video example of a problem
OKnkqayLRR.mp4
Added subscriber: @CheeryLee
Added subscriber: @mano-wii
Changed status from 'Open' to: 'Archived'
This is a limitation in the OpenGL graphics driver.
Some drivers lock all threads in the current process while performing OpenGL functions.
The problem will probably be alleviated or even resolved when Blender has support to Vulcan.