1203304 - Tab doesn't redraw correctly when switching between HiDPI and LowDPI modes

Status: UNCONFIRMED

(Core :: Graphics, defect)

Description

[adam]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0
Build ID: 20150909004021

Steps to reproduce:

Gnome-tweak-tool to modify "Window scaling" from 1 to 2 or 2 to 1.

There is still only one "Window scaling" value for the whole desktop on Linux regardless of mix of HiDPI vs LowDPI screens.

This is on Fedora 22


Actual results:

Web content rendered too small or too large. The results are identical to the images on bug 1181745

New tabs open properly, refreshing old tabs does not fix. If switching back to LowDPI when experiencing this rendering issue, the old tabs render properly (but the tabs opened in HiDPI mode are very large which is same behavior reported above).

Comment 1

[Loic]

Surely a dupe of bug 1181745 but for Linux.

Did you use mozregression to find the same regression range?

Comment 2

[Steven Michaud [:smichaud] (Retired)]

> Surely a dupe of bug 1181745 but for Linux.

Very unlikely, I think -- though the two bugs may be related.  Bug 1181745 was triggered by the patch for bug 1151644, which only effected OS X.

Comment 3

[adam]

I have not used mozregression before, this is the first HiDPI screen I have had so never had to experience this before. Not sure if it is a regression, but from the other reports seems so.

Comment 4

[Lee Salzman [:lsalzman]]

If you resize the window, does that make the tabs update properly after the DPI change?