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I had the impression Debian applied patches that widen arch support from what upstream officially supports, including for the MI50/MI60.

https://salsa.debian.org/rocm-team/rocm-hipamd/-/raw/d6d2014... (one patch of many)

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I wrote that patch. It's not actually used for MI50/MI60 in any of the Debian system packages, since Debian builds for gfx906 rather than using the gfx900 fallback path that patch provides. Debian is not relying on any special patches to enhance gfx906 support. That architecture is the same as upstream.

Now, for some other GPU architectures, you're absolutely right. There are indeed important patches in Debian that enable its extra-wide hardware compatibility.

Thanks for all your work on this.

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