not sure how AMD devs are choosing bugs to look at but they use feedback provided by users filling bugs.
Here is 2 examples where they did leave comments:
I didn't got any other support channel than the unofficial ati.cchtml.com bug tracker.* :/
Originally Posted by jjmcwill2003
However, at least for the bug that I filed
it turned out that the AMD devs actually fixed it within ~2 month.
I'm pretty sure that it was due to the bug report as the bug occurs only for very exotic dual-head
configurations with some of the displays rotated. Additionally, my displays have different resolutions.
Not sure what the real underlying reason was though. The bug was present for all Catalyst versions I tried.
BTW, it is still present in the legacy driver.
The downside; the devs never replied to my bug report.
[*] You can try to ask Bridgman. Meanwhile he might have found the contact information and he's willing to share it.