> We have collected some steps you should mind within the Wiki. > > https://wiki.debian.org/Thunderbird#Bug_Reporting_.2F_Issues
I disabled all addons and also tried safe mode: Doesn't make a difference. I didn't try to create a fresh profile. And I couldn't find any bugs on the Debian tracker or Bugzilla that looked like this one. > This isn't completely correct from a technical aspect. > Thunderbird is still using the default line wrapping on 72 characters. > This is easy to check if you send an email to yourself. Unfortunately, this is not the case: The sent email has its text wrapped at ~54 characters, when autowrap is enabled. It's not just a presentation issue. When I look at response mails from other people, I can see that the quoted text was hard-wrapped by TB in the wrong places, while the responder's text is fine. > I do workaround around this temporally by adjusting the DPI scaling > using the key combination 'Crtl +' or using the 'Crtl' key and the > scroll wheel on the mouse. That's a... very interesting workaround. Even more interestingly, the text size doesn't even change when I "zoom" using Ctrl-+, only the wrapping. Only at high zoom levels do I get a change in font size. But that could very well be due to minimum font size. Now that I look at it, that's a setting that I did customise a very long time ago. Thunderbird has always had issues with font sizes and Hi-DPI rendering on Linux. My Proportional font size is set to 16, while Monospace is set to 12. Minimum font size is 16. Without this, text would render way too small. I'll see if changing/resetting these makes any difference. >> This was not the case with Firefox 68.4. > > You mean Thunderbird here for sure. Yes of course. My bad. >> As a workaround, it's possible to set mail.wrap_long_lines and >> plain_text.wrap_long_ones to false, but this is undesirable. > > By this you turn off the line wrapping totally, for plain text > (plain_text.x) and HTML (mail.x). Yes... That's why I think it's undesirable. When I combine your zooming suggestion with disabling these two options, wrapping isn't totally messed up any more. But the text still wraps. > The issue you seeing is a upstream problem, it happen too with the > provided upstream binaries from Mozilla so it should get reported on the > bugzilla tracker of Mozilla. Would you take care of this and create a > upstream bug report and provide the URL on this? Yes, I can do that. I wasn't sure if the issue was something in Debian or a general problem. Thanks for the explanation. Do you have any ideas what the root of the problem could be? A bug in in GTK3? Incorrect usage of font metrics APIs?
