GPU acceleration has completely screwed up the picture. For years

[lflegg]

How is this going to be fixed?

I'm sick of waiting so many years for this massive bug to be addressed. 

Premiere advertises itself as 'unleashing the power of your GPU' but fails to mention it completely messes up the video doing so.

Software only is fine:

CUDA and OpenCL are both:

1.  much lighter (what the hell?) Edit: After posting this, I hover my cursor over these images and they dim (as a mouse-over function) and they actually match brightness more I think when the GPU accelerated one is dimmed by this forum software)
2.  the blur on the logo is cropped at the top and bottom (totally unprofessional looking)

I put the software only one up again for closer comparison.

Both exactly the same frame from the timeline.

Latest version of Premiere. Latest RTX3090 drivers. I'm annoyed because this has been consistently plaguing Premiere for many years.

[Kyle Plumadore]

My best guess is this is due to the GPU renderer blending in linear color by default. You can disable this by unselecting "Composite in Linear Color" under "Sequence Settings" -> "General" 

If you provide your project/media we can take a closer look. 

[lflegg]

Thanks,

hmm - definitely had some effect but only on the big background logo, not the entire image (which switching to software changes)

Meanwhile, I found a workaround for the cropped blur effect: Disable "repeat edge pixels" on the logo graphic.
Doesn't really make sense to me why that fixed it, or why it's current state isn't the default.