Yes, i set the DPI setting (300DPI) in the Paper Format settings
settings -> technical -> reports -> paper format -> A4
if we have several paper formats, then we can set the associated reports.
The default is 90 DPI with Odoo, but the DPI resolution can be changed in this way.
In other Odoo installations (windows, deb, nightly, Github, SaaS) changing the DPI this way works, but not with Bitnami.
I have tried.
So i went to
settings -> technical -> reports -> reports -> quotation/order (sale.report_saleorder)
changed the report type to HTML (from PDF).
Now when we print quotations it will be html in a new window (full resolution).
Now when i print that HTML in my ubuntu server as a pdf (i suppose using the same wkhtmltopdf engine) the PDF report comes out at full resolution.
So it seems that Odoo from Bitnami was not able to use the changed DPI setting when the report is set to PDF (directly). Im not that sure though as i dont know programming codes.