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GetDefaultPrinterDPI() creates a blank GtkPrintSettings and reads its resolution, which returns 0 for uninitialized settings. With DPI=0, SetPrintableAreaIfValid() computes a zero scale factor, producing empty page dimensions that fail PrintMsgPrintParamsIsValid(). Fall back to kDefaultPdfDpi (72) when GTK returns 0, matching the existing Windows fallback pattern when CreateDC fails. Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
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jkleinsc
approved these changes
Mar 26, 2026
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Backport of #50453
See that PR for details.
Notes: none.