This is EXTREMELY annoying and also happens to me every time I resume from suspend:
OS: OpenSUSE Leap 42.2
KDE Plasma: 5.8.3
nVidia hardware: GeForce 310M
nVidia driver: 340.101
If I were the Qt guys I wouldn’t bother doing anything as this “quirk” is really all nVidia’s fault. As is stated at https://www.opengl.org/registry/specs/NV/robustness_video_memory_purge.txt
“GL_NV_robustness_video_memory_purge” "will have a limited lifespan, as planned architectural
evolutions in the NVIDIA Linux driver stack will allow
video memory to be persistent. Any driver that exposes this
extension is a driver that considers video memory to be
volatile. Once the driver stack has been improved, the extension
will no longer be exposed.
The question should be what is the ETA of the improvements to the nVidia driver stack so that this serious issue will be fixed?