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Issue 632785 link

Starred by 10 users
Status: Fixed
Owner: ----
Closed: Aug 2016
Cc:
sunn...@chromium.org
█ jbau...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug

Blocking:
issue 422000



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Direct3D11/GPU is not properly initialized until Chrome app window is resized?

Reported by jer...@duckware.com, Jul 29 2016 
UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Steps to reproduce the problem:
0. find a Win7 / Intel HD graphics system (I used Intel 4400)
1. run latest Chromium (DO NOT MOVE OR RESIZE CHROME APP WINDOW)
2. visit http://www.vsynctester.com
3. notice vsync graph is 'flat', but vsync word indicator flickers (vsync failure)
4. notice input lag indicator shows 1 frame of input lag

5. resize the chrome app window

6. notice that vsync graph now has spikes (still flickers failure like before)
7. notice input lag indicator now shows 2 frames of input lag

What is the expected behavior?
Chrome should not change behavior, simply because the app window is resized

What went wrong?
There appears to be some initialization problem, until the Chrome window is resized.

Did this work before? N/A 

Chrome version: 54.0.2811.0  Channel: canary
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

most likely related to  issue 465356 , but now seen with Direct3D11

Comment 1 by jer...@duckware.com, Jul 30 2016 

In steps above, insert this step:

2.5: click gear icon, uncheck 'preview' under 'background image', click gear icon

Comment 2 by durga.behera@chromium.org, Aug 1 2016

Cc: sunn...@chromium.org
Components: Internals>GPU
Labels: M-54 Needs-Feedback
Have attached a screen shot of the http://www.vsynctester.com page following above steps on Win 7 using canary 54.0.2815.0,and cced the dev from the above reference(www. crbug.com/465356#c7 ) to further update on this.
632785_Aug_1.png
459 KB View Download

Comment 3 by jer...@duckware.com, Aug 1 2016 

durga.behera/2, what was the input lag you noticed as you moved the mouse around?

Attached is what I see on another system, a Dell Inspiron with Intel HD 5500 graphics.
win7-intel5500-afterstep4.jpg
115 KB View Download
win7-intel5500-afterstep7.jpg
118 KB View Download

Comment 4 by skyos...@chromium.org, Aug 1 2016

Blocking: 422000
Project Member

Comment 5 by bugdroid1@chromium.org, Aug 2 2016 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cb571e2230c90eec7d7c498f6dfd293eaa350001

commit cb571e2230c90eec7d7c498f6dfd293eaa350001
Author: jbauman <jbauman@chromium.org>
Date: Tue Aug 02 23:19:09 2016

Update vsync override in PostSubBuffers.

This was only happening in SwapBuffers, so the vsync override could
become stale if only PostSubBuffers were happening.

BUG= 632785 

Review-Url: https://codereview.chromium.org/2188063002
Cr-Commit-Position: refs/heads/master@{#409376}

[modify] https://crrev.com/cb571e2230c90eec7d7c498f6dfd293eaa350001/ui/gl/gl_surface_egl.cc
[modify] https://crrev.com/cb571e2230c90eec7d7c498f6dfd293eaa350001/ui/gl/gl_surface_egl.h

Comment 6 by jer...@duckware.com, Aug 3 2016 

jbauman, thanks!  Looks fixed.  Will test more extensively tomorrow.

Comment 7 by jer...@duckware.com, Aug 3 2016 

Tested Canary 54.0.2817.0 r409416 on three systems.  All worked.  Can mark this issue as fixed.

Comment 8 by jbau...@chromium.org, Aug 4 2016

Cc: jbau...@chromium.org
Status: Fixed (was: Unconfirmed)

Comment 9 by jer...@duckware.com, Feb 9 2017 

The fix for this issue breaks --disable-gpu-vsync.  See  issue 480361 .
►

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