[Tracking Requested - why for this release]: [Tracking Requested - why for this release]: +++ This bug was initially created as a clone of Bug #1252046 +++ Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0 ID:20160229030448 Reproducible : always Steps To Reproduce: 1. Disabled HWA 2. Open http://wowslider.com/it/banner-maker-geometric-kenburns-demo.html Actual Results: Images glitch, tremendous badly See capture: https://www.youtube.com/watch?v=2BXhfR99e0c Expected results: No glitch Regression window: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=d8e260e1535f0ff3877b21d6846380dedf449453&tochange=6630a176477ef903dcf3057db755abc43ba5018d Regressed by: Bug 1082598 Graphics -------- Adapter Description: AMD Radeon HD 6450 Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 1024 Asynchronous Pan/Zoom: wheel input enabled; touch input enabled ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 300 Device ID: 0x6779 DirectWrite Enabled: false (6.2.9200.17568) Driver Date: 7-28-2015 Driver Version: 15.200.1062.1003 GPU #2 Active: false GPU Accelerated Windows: 0/1 Basic (OMTC) Subsys ID: 23111787 Supports Hardware H264 Decoding: No; Hardware video decoding disabled or blacklisted Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6450 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasAccelerated: 0 AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo
Alice, do we see this on other platforms when canvas is Skia?
Umm, worsens when e10s on + HWA off.
tracking-firefox46: ? → ---
tracking-firefox47: ? → ---
Summary: Images glitch worsens in sites that use a popular KenBurns slider with Disabled HWA → [e10s] Images glitch worsens in sites that use a popular KenBurns slider with Disabled HWA
(In reply to Milan Sreckovic [:milan] from comment #4) > Hmm, if this is bad with cairo canvas (comment 2), it shouldn't be a > regression from updating skia (comment 0.) At a first glance, I couldn't > find non-Skia related stuff in that bug. On ubuntu, The glitch is less than on Window. And also, the regression range is different from comment#0. Regression window on ubuntu14.04 (e10s on + HWA off): https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=600942ae9823ae85186cd613b65582078489daa4&tochange=432ef38dab958e325c2e56dd4093be023c221043
Filed Bug 1253386 for Ubuntu.
Summary: [e10s] Images glitch worsens in sites that use a popular KenBurns slider with Disabled HWA → [e10s] Images glitch worsens in sites that use a popular KenBurns slider with Disabled HWA on Windows7
This seems possibly a manifestation of what is already being investigated by Edwin in bug 1253386. I do not believe updating would have caused this, but rather could have conceivably made the underlying issue more apparent for reasons not yet known. Let's wait and see what Edwin turns up, and hopefully we can just resolve this as a duplicate if he can track down a cause. The unifying theme here is that Windows 7 and Ubuntu are probably both using image backends (in one case Skia, the other Cairo), so the different regression ranges may just be a red herring.
Parking this with Lee to dupe or do follow-up investigation as needed. Note that this is a regression in 46, so it's showing up on the "Firefox Release Health" dashboard  as a new regression and potential release blocker.  http://mozilla.github.io/releasehealth/
Assignee: nobody → lsalzman
I discussed with Edwin, Nical, and Matt regarding what we thought the underlying issue was and the best way to progress with a workaround in the short-term. The issue seems to be a manifestation of bug 1251257, that we are overwriting the canvas client's buffer while the compositor is using it. This ends up causing tearing. Matt suspects that we should be fine just to double buffer the canvas client based on the refresh driver synchronization he had implemented here: http://mxr.mozilla.org/mozilla-central/source/layout/base/nsRefreshDriver.cpp#1647 I tested a double-buffering prototype Edwin was working on both under Linux and Windows. I was able to reproduce the issue on both platforms without the patch, and with the patch, the problem was fixed on both platforms. Since Edwin is already working on this in 1253386, I am going to mark this as a dup.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Depends on: 1251257
Resolution: --- → DUPLICATE
Duplicate of bug: 1253386
Thanks for the quick resolution!
status-firefox46: affected → unaffected
status-firefox47: affected → fixed
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