glGenerateMipmap corruption after hibernate

[kokoko3k]

Yeah, this is nice indeed:

This extension 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.
[…]
Revision History

<b>#1 April 1, 2016:</b> Arthur Huillet
    - First draft.

#2 April 2, 2016: Jeff Juliano
    - Reflow with line wrap, eliminate tabs.

#3 April 5, 2016: Arthur Huillet
    - Rewrite as extension of ARB_robustness.

#4 April 20, 2016: Arthur Huillet
    - Improve language.

#5 May 26, 2016: Arthur Huillet
    - Add a context creation bit.

What’s a limited lifespan? It has been more than two years…