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Issue 771798 link

Starred by 1 user
Status: Duplicate
Merged: issue 770678
Owner:
sahel@chromium.org
Closed: Oct 2017
Cc:
bokan@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 3
Type: Bug



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ctrl+scrolling with mouse wheel causes zoom level to increase by 2 instead of 1

Reported by thesqrtm...@gmail.com, Oct 4 2017 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3232.0 Safari/537.36

Steps to reproduce the problem:
1. open website 
2. zoom with ctrl+scroll wheel

What is the expected behavior?
ctrl+scrollup should increase zoom to 110% 
ctrl+scrolldown should decrease zoom to 90%

What went wrong?
ctrl+scrollup increases zoom to 125%
ctrl+scrolldown decreases zoom to 80%

Did this work before? N/A 

Chrome version: 63.0.3232.0  Channel: canary
OS Version: 10.0
Flash Version:

Comment 1 by woxxom@gmail.com, Oct 4 2017 

Using the default new tab page as a website, bisect info: 497480 (good) - 497496 (bad)
https://chromium.googlesource.com/chromium/src/+log/8acbd144..234a4ebf?pretty=fuller
Suspecting r497483 "Wheel scroll latching and async wheel events flags enabled in testing config"
Landed in 62.0.3197.0

Confirmed by disabling scroll latching via command line and observing the bug is gone:
chrome --disable-features=TouchpadAndWheelScrollLatching

Comment 2 by nyerramilli@chromium.org, Oct 5 2017

Labels: Needs-Triage-M63 Needs-Bisect

Comment 3 by brajkumar@chromium.org, Oct 5 2017

Labels: -Needs-Bisect
Mergedinto: 770678
Status: Duplicate (was: Unconfirmed)
This issue looks similar to  bug 770678 , hence merging in to it. Feel free to undupe if it's a different issue.

Thanks!

Comment 4 by bokan@chromium.org, Oct 5 2017

Cc: bokan@chromium.org
Components: -UI Blink>Scroll
Labels: -OS-Windows -Pri-2 Pri-3
Owner: sahel@chromium.org
Status: Assigned (was: Duplicate)
Repros on Linux too so it's not OS specific.

Both issues are related to latching but it's not yet clear the cause is the same. I'll undup this so we don't forget to check this issue, if sahel@ finds the cause to be the same we can dup back.

Comment 5 by sahel@chromium.org, Oct 5 2017

Status: Duplicate (was: Assigned)
The root cause of the issue is the same for both of them, https://chromium-review.googlesource.com/c/chromium/src/+/701734 fixes the issue.
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