[Bug]: Protocol error (Page.printToPDF): scale is outside of [0.1 - 2] range

[EBDZV]

Version

1.52.0

Steps to reproduce

In Docker:

FROM taavipall/fasta36-suite:v36.3.8

RUN apt-get update && apt-get install -y \
    ca-certificates \
    wget && \
    update-ca-certificates

RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
RUN python3 get-pip.py

RUN python3 -m pip install --upgrade pip

RUN python3 -m pip install playwright==1.52.0

RUN playwright install --with-deps

COPY . .

In a file named generate.py

import logging
import os

from playwright.sync_api import sync_playwright

with sync_playwright() as playwright:
    browser = playwright.chromium.launch(headless=True)
    context = browser.new_context()

    try:
        page = context.new_page()

        page.goto(
            "https://comparefasta.comparedatabase.org/executefasta.php?full_text_flag=1&sliding_80_flag=0&sliding_8_flag=0"
        )

        page.emulate_media(media="screen")
        page.pdf(
            path="/testing.pdf",
            print_background=True,
            scale=0.5,
            margin={
                "top": "10mm",
                "bottom": "10mm",
                "left": "25mm",
                "right": "25mm",
            },
        )

        page.close()

    except:
        raise
    finally:
        context.close()
        browser.close()

then, run through docker using

docker build -t debug -f Dockerfile .

docker run --rm -it \
  debug \
  python3 generate.py

and we get the following error:

Traceback (most recent call last):
  File "/usr/local/src/generate.py", line 18, in <module>
    page.pdf(
  File "/usr/local/lib/python3.10/dist-packages/playwright/sync_api/_generated.py", line 11703, in pdf
    self._sync(
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_sync_base.py", line 115, in _sync
    return task.result()
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_page.py", line 1140, in pdf
    encoded_binary = await self._channel.send("pdf", params)
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_connection.py", line 61, in send
    return await self._connection.wrap_api_call(
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_connection.py", line 528, in wrap_api_call
    raise rewrite_error(error, f"{parsed_st['apiName']}: {error}") from None
playwright._impl._errors.Error: Page.pdf: Protocol error (Page.printToPDF): scale is outside of [0.1 - 2] range

Note that the scale parameter works when running this outside docker on a mac M1 machine. however, this seems to be a bug when running this on any windows instance. the only other reference i found online was here, which wasn't associated with playwright: https://forum.obsidian.md/t/unable-to-export-to-pdf/54877/15

Expected behavior

the pdf is created successfully with the scale factor applied

Actual behavior

Traceback (most recent call last):
  File "/usr/local/src/generate.py", line 18, in <module>
    page.pdf(
  File "/usr/local/lib/python3.10/dist-packages/playwright/sync_api/_generated.py", line 11703, in pdf
    self._sync(
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_sync_base.py", line 115, in _sync
    return task.result()
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_page.py", line 1140, in pdf
    encoded_binary = await self._channel.send("pdf", params)
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_connection.py", line 61, in send
    return await self._connection.wrap_api_call(
  File "/usr/local/lib/python3.10/dist-packages/playwright/_impl/_connection.py", line 528, in wrap_api_call
    raise rewrite_error(error, f"{parsed_st['apiName']}: {error}") from None
playwright._impl._errors.Error: Page.pdf: Protocol error (Page.printToPDF): scale is outside of [0.1 - 2] range

Additional context

No response

Environment

- Operating System: [Ubuntu 22.04] (in docker)
- CPU: [M1] (but running in docker)
- Browser: [Chromium]
- Python Version: [3.10.1211]
- Other info:

[mxschmitt]

The problem seems like that you are trying to use a amd64 container on a arm64 host. This is not supported and leads to issues like this. Docker internally will pick the matching platform but the image you are using is not available in linux/arm64 so its falling back to amd64. When changing it to this it works for me. (also without the platform):

FROM --platform=linux/arm64 mcr.microsoft.com/playwright/python:v1.52.0-noble

(Looks like something is going wrong with the QEMU user-mode binary translator Docker is using.)

I'll close it for now since this is not a Playwright bug.