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Issue 719255 link

Starred by 3 users
Status: Available
Owner: ----
Cc:
rbasuvula@chromium.org
█ sureshkumari@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows
Pri: 3
Type: Bug



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Combo boxes flicker when expanded/collapsed

Reported by tereza.t...@gmail.com, May 7 2017 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36 OPR/44.0.2510.1218

Steps to reproduce the problem:
1. Go to https://codepen.io/anon/pen/pPdKPZ
2. (Optionally) set CPU throttling in dev tools
3. Click the combo box a few times

What is the expected behavior?
The expanded combo box is displayed in one step (without flickering).

What went wrong?
Sometimes a white rectangle with the border is painted before the actual combo box content is displayed.

Did this work before? N/A 

Chrome version: 60.0.3091.0  Channel: canary
OS Version: 10.0
Flash Version: 

The demo uses background colors, but it's also reproducible without them.
chrome-combobox-flicker.png
6.4 KB View Download

Comment 1 by sureshkumari@chromium.org, May 8 2017

Cc: sureshkumari@chromium.org
Labels: Needs-Feedback
Able to reproduce the issue on Windows-10 using stable version 58.0.3029.96 and canary 60.0.3091.0 with the steps mentioned in comment#0.
But observed that the behavior is inconsistent with the provided steps.
Could you please provide any other Url to test the issue.

Thanks.

Comment 2 by ranjitkan@chromium.org, May 12 2017

Labels: Needs-Triage-M60

Comment 3 by rbasuvula@chromium.org, Jul 10 2017

Cc: rbasuvula@chromium.org
@ tereza.tomcova : Could you please update on comment #1 which would help us to triage the issue further.

Comment 4 by woxxom@gmail.com, Jul 10 2017 

There's no need for another test URL, actually.
The inconsistency of the paint is what the bug report is about.
I can reproduce the bug easily even without devtools throttling on a fast PC with 4GHz i7 CPU and nVidia GTX 750 Ti.

Bisect: 241520 (good) - 241577 (bad), 34.0.1752.0
https://chromium.googlesource.com/chromium/src/+log/d4a8f60f..bdccb6c2?pretty=fuller
Suspecting r241569 https://codereview.chromium.org/99873007
Other possible suspects: r241560, r241550

Obviously a per-revision bisect would be helpful.

Comment 5 by krajshree@chromium.org, Jul 17 2017

Components: Blink>Layout>Flexbox
Labels: -Needs-Feedback -Needs-Triage-M60 M-61 OS-Linux
Status: Untriaged (was: Unconfirmed)
Able to reproduce the issue on Win-10 and Ubuntu 14.04 using chrome stable version #59.0.3071.115 and latest canary #61.0.3159.0.
Issue is not seen in OS-Mac.

This is a non-regression issue as it is observed from M45 old builds. 

Hence, marking it as untriaged to get more inputs from dev team.

Thanks...!!

Comment 6 by e...@chromium.org, Jul 17 2017

Status: Assigned (was: Untriaged)

Comment 7 by e...@chromium.org, May 29 2018

Labels: -Pri-2 Pri-3
Status: Available (was: Assigned)
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