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Issue metadata

Status: WontFix
Owner:
Closed: Dec 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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Regression:Text appears blur after performing pinch to zoom on edit page overlay

Reported by vku...@etouch.net, Oct 30 2017

Issue description

Chrome Version: 63.0.3239.26(Official build) 4dc4a1fadfb64aefa5850be806dac60336406dd9-refs/branch-heads/3239@{#286} (32/64-bit)
OS: Windows 10 Touch device

What steps will reproduce the problem?
(1)Launch chrome and navigate to twitter.com
(2)Navigate to chrome://settings/ > on startup > open a specific page..> use current pages
(3)Tap on edit zoom in/out using pinch to zoom and observe

Actual: Text appears blur after performing pinch to zoom on edit page overlay.

Expected: Text should be properly seen after performing pinch to zoom on edit page overlay.

This is a Win 10 touch device specific regression issue broken in 'M63' and below is the bisect info

Good build: 63.0.3205.0
Bad Build:  63.0.3206.0

You are probably looking for a change made after 499514 (known good), but no later than 499515 (first known bad).
CHANGELOG URL:
The script might not always return single CL as suspect as some perf builds might get missing due to failure.
https://chromium.googlesource.com/chromium/src/+log/b70fe76b06b21bac5f75bd30a982df398717333e..cd76873d94cd26b7f65d5ddd18663406ec92c1a9

Suspecting: https://chromium.googlesource.com/chromium/src/+/cd76873d94cd26b7f65d5ddd18663406ec92c1a9

Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.
 
ActualText.png
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Actual text.mp4
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Expected Text.mp4
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Labels: ReleaseBlock-Stable
Adding release blocker for this issue.Please undo if not the case.

Thank You!
@johnme: Gentle ping, request you to please take a look into it. Issue is tagged with a blocker for M63 and is set to be pushed to stable soon.

Thanks.!
M63 Stable promotion is coming soon and your bug is labelled as Stable ReleaseBlock, pls make sure to land the fix and request a merge to M63 ASAP. Thank you.
Owner: bokan@chromium.org
Since John no longer on Chrome team assigning bug to David based on offline Chat for further insights.

Comment 5 by bokan@chromium.org, Nov 8 2017

Cc: bokan@chromium.org
Labels: -ReleaseBlock-Stable
Owner: chaopeng@chromium.org
chaopeng@ says this only occurs on the settings page so this doesn't seem like a blocker to me. Still, we should investigate and fix quickly.

The blamed patch seems very unlikely to me to have this effect. Chao, could you double check whether reverting that patch helps? If not, we'll need to do a new bisect to find the culprit.

Comment 6 by bokan@chromium.org, Nov 13 2017

Cc: -bokan@chromium.org chaopeng@chromium.org
Labels: -Pri-1 Pri-2
Owner: bokan@chromium.org
I can't notice a difference when I try this on a Surface Book Pro between Chrome Stable 62.0.3202.89 and Canary 64.0.3267.0. What device were you using?

If there really is a clear difference, could you please retry the bisect? I suspect this isn't a regression and maybe the combination of screen resolution and what scale you land on the pinch zoom produces a bad result...

Comment 7 by bokan@chromium.org, Nov 13 2017

Labels: Needs-Bisect Needs-Feedback

Comment 8 by bokan@chromium.org, Nov 17 2017

vkupte@, could you be more specific about what device you were seeing this on? In particular, the screen pixel density might make a difference (you can get that by opening up dev tools - ctrl + shift + i, and typing `window.devicePixelRatio` into the console.
vkupte@ are u still seeing this issue?

Comment 10 by vku...@etouch.net, Dec 8 2017

Labels: -Needs-Feedback -Needs-Bisect
As per comment 8 & 9:
Rechecked again and above issue is not reproducible on latest canary version 65.0.3288.0(Official build) on Windows 10 touch device.

Comment 11 by bokan@chromium.org, Dec 14 2017

Status: WontFix (was: Assigned)
Thanks, closing as per #10

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