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Issue 841191 link

Starred by 1 user
Status: Duplicate
Merged: issue 624992
Owner: ----
Closed: May 2018
Cc:
robliao@chromium.org
kylixrd@chromium.org
malaykeshav@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 3
Type: Bug



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Tooltips and system menu use wrong scaling when toggling between scaling amounts

Project Member Reported by brucedaw...@chromium.org, May 9 2018 
My laptop has a 4K screen that I run at 200% scaling (the Windows scaling setting). I'm plugged in to 30" 2560x1600 monitor which I run at 100% scaling. Chrome mostly handles this well, but the tooltips are always displayed at 200%. This makes them look ridiculous on the 30" monitor.

I've attachedscreenshots from the 4K and 1600p monitors, although I should really have scaled one of them up or down to make it clear that the tabs are the right size in both cases but the tooltips are wrong in the bottom one.

The system menu (right-click on an empty part of the titlebar) is also scaled up 2:1 and looks pretty crazy. All tooltips are affected.
Scaling.png
23.7 KB View Download

Comment 1 by brucedaw...@chromium.org, May 9 2018 

Oddly enough if I quit Chrome (and make sure all processes have terminated) and then relaunch it then the problem persists. I am doing this with the internal display disabled (Multiple displays set to "Show only on 2") so that the only display in use is set to 100%. And yet, the tool-tips and context menu are displayed at 100%.

This also affects the file dialog when invoked from Chrome. It appears to be running at 200%, whereas the same file dialog invoked from mspaint appears normally. I assume that all of these glitches stem from a singular root cause. We must be retrieving the DPI settings incorrectly - somehow we are getting it for the disabled monitor.

Comment 2 by robliao@chromium.org, May 9 2018

Mergedinto: 624992
Status: Duplicate (was: Untriaged)
This is an artifact of V1 per-monitor DPI scaling.

Comment 3 by brucedaw...@chromium.org, May 19 2018 

I restarted Chrome (to update it, maybe that makes a different) while only the 1:1 secondary monitor was active and somehow this time Chrome latched the DPI settings of that monitor - usually it doesn't. So, later on I found myself with 1:1 scaled tooltips and file dialog on a monitor that I was comfortably running at 250%. The tooltips and file dialog were unusably slow. Restarting Chrome didn't help so I had to log off. Screenshot attached, FWIW.
TinyTooltips.png
18.3 KB View Download
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