This issue has been fixed upstream in the 5.x branch (see earlier link
to kernel bugzilla). I have tested 5.0.2 and 5.0.4 successfully.
- Bug#919227: linux-image-4.19.0-1-amd64: acpi lid regression ... Andrea Borgia
- Bug#919227: more acpi info Andrea Borgia
- Bug#919227: dmesg output with patched kernel Andrea Borgia
- Bug#919227: fixed upstream Andrea Borgia
