Description of problem: I have two screens, a HiDPI laptop screen and an external monitor. The way that firefox behaves when the window is dragged between the screens is incorrect. Essentially, *correctly* switches to HiDPI mode (everything is scaled down two times) when the window is dragged over to the HiDPI screen. But it *incorrectly* does it too early. A gnome-terminal window switches to the HiDPI mode when more than half of the window is on the HiDPI screen. Firefox switches immediately, and it even switches before *any* of the firefox window is the new screen. It is enough to drag the window *close* to the boundary to elicit a flicker and unexpected size changes (something like ~100 pixels). See the attached screenshot: it shows a firefox window which was dragged over the edge and back, and the display shows incorrect scaling that it too small for the actual window size. Version-Release number of selected component (if applicable): firefox-60.0.1-6.fc28.x86_64 gnome-shell-3.28.2-1.fc28.x86_64 How reproducible: 100%, but requires moving the window back and forth over the edge a few times Steps to Reproduce: 1. open a firefox window on low-dpi screen 2. move the firefox window towards the border with a high-dpi screen 3. when the firefox window is ~100 pixels out, it briefly switches to hidpi resolution 4. when the firefox window is flush with the border, it incorrectly has hidpi resolution Expected results: gnome-terminal does this very nicely nowadays, it keeps the resolution which is appropriate for the part of the window that has the majority surface.
Created attachment 1448415 [details] screenshot showing firefox window wrong scaling
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This is a bit better, but still a major issue with firefox-wayland-66.0.3-1.fc30.x86_64.
Can you please try latest nightly from mozilla.com? Thanks.
Wow, nightly 68.0a1 (2019-05-06) (64-bit) is fixed! It seems that both this issue and and wrong sizing of pop-up menus is all good now.
Good to know, Thanks.
I screwed up the test, sorry. (I was actually running the x11 version.) This is still reproducible with 68.0a1 (2019-05-17) (64-bit).
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Still there, although to a much lesser extent than before. (It's possible that it is a different bug.) firefox-76.0.1-1.fc32.x86_64 I still observe an effect when the window is moved close to the boundary. When moving the window close the boundary, there is a flash and a redrawing of the content of the window. After the content is redrawn, there is a slight pixelization. It looks like the window is scaled to higher resolution and then rescaled to show at the original size. Not pretty, but much better then before.
This message is a reminder that Fedora 32 is nearing its end of life. Fedora will stop maintaining and issuing updates for Fedora 32 on 2021-05-25. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '32'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 32 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 32 changed to end-of-life (EOL) status on 2021-05-25. Fedora 32 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.