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This PETSc PR below increased the minimum acceptable MUMPS version, so the MUMPS 5.6 that is shipped with Ubuntu24.04 no longer works with PETSc main.

This PR swaps Firedrake to asking PETSc to download MUMPS instead so we get a recent enough version.

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Should we open an issue to revisit this when either PETSc support an older MUMPS again or Ubuntu LTS changes?

@JHopeCollins JHopeCollins enabled auto-merge (squash) October 20, 2025 09:53
@JHopeCollins JHopeCollins disabled auto-merge October 20, 2025 10:46
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Only failure is an unrelated linkcheck in the documentation so I'm going to merge this because it's breaking CI on several other PRs.

@JHopeCollins JHopeCollins merged commit d5391b3 into main Oct 20, 2025
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@JHopeCollins JHopeCollins deleted the JHopeCollins/bugfix-mumps-pcprecision branch October 20, 2025 10:47
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