With the GSDX-ogl plugin of PCSX2, I got a black screen since commit fe1e89a026fb85cc7dffbd3f967687186796631e "glsl: don't allow invariant qualifiers for interface blocks" Tested on radeon HD4850, HD5770 and LLVMpipe, but it may affect all drivers. Reverting the commit solves this issue.
Marked as solved as PCSX2 no longer rely on invariant qualifiers since commit 1a58458bc51f279817b6fa791e76ad41546a7e29.
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