[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91880

--- Comment #7 from Lauri Gustafsson <luutifa at gmail.com> ---
I did get Unigine Heaven running with DPM on for a few seconds (before
hanging), showing way better frame rates than before.
It really seems that
- The performance issues are most likely caused by the lack of DPM
- DPM for Grenada GPUs is not supported completely
Or:
- My card has a really weird (stock) VBIOS that Radeon(si?) cannot
interpret/work with.

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