Gary [:streetwolf52] Reporter
	Description • 9 years ago

A very good example is the about:config context menus.  Also the menus from the sidebar.  I ran a mozregression-gui and came up with this:

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=1a8fc158b56d42dc118cd8db0881e554068d7aab&tochange=415f713d58b0803cf143f0a605ed79409d57fc1d

Doesn't look like any of these could be the cause but who knows.

	Loic
	Comment 1 • 9 years ago

I can't reproduce it with FF46 32/64b on win 7.

	Jonathan Kew [:jfkthame]
	Comment 2 • 9 years ago

I'm seeing this (in a Win10 VM) not with the menus mentioned in comment 0, but with examples like the Confirm Close ("You are about to close 11 tabs...") or Cancel All Downloads (if a download is in progress) alert that appears when clicking the browser window's close button: the alert appears but its contents doesn't render until I mouse over it.

It doesn't seem to be 100% reproducible for me -- at least once just now, the Confirm Close dialog rendered right away as expected -- but it's happening pretty consistently with the latest inbound build.

Mason, is it possible this could be some kind of compositing issue related to bug 1239861?

	Gary [:streetwolf52] Reporter
	Comment 3 • 9 years ago

If I turn off HWA the problem doesn't happen.

	Alice0775 White
	Comment 5 • 9 years ago

Setting layers.acceleration.disabled = true seems fix the problem

	Gary [:streetwolf52] Reporter
	Comment 6 • 9 years ago

I can repro the problem 100% of the time in many ways.

	Gary [:streetwolf52] Reporter
	Comment 7 • 9 years ago

So far I'm the only one seeing it in many different places. Perhaps it is dependent on one's graphic drivers as to how it manifests itself?

Graphics
--------

Adapter Description: AMD Radeon (TM) R9 390 Series
Adapter Drivers: aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Adapter RAM: 4095
Asynchronous Pan/Zoom: wheel input enabled
ClearType Parameters: D [ Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 ] D [ Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 ]
Device ID: 0x67b1
Direct2D Enabled: true
DirectWrite Enabled: true (10.0.10586.0)
Driver Date: 12-23-2015
Driver Version: 15.301.1201.0
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 00000000
Supports Hardware H264 Decoding: Yes
Vendor ID: 0x1002
WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon (TM) R9 390 Series Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

	Mason Chang [Inactive] [:mchang] Assignee
	Comment 8 • 9 years ago

It could be bug 1239861, which was backed out for other things. Are you still seeing it on nightly?

Do you have a screenshot as well please? Thanks!

	Jonathan Kew [:jfkthame]
	Comment 11 • 9 years ago

Note that the backout won't hit Nightly until the 2016-01-22 build, AFAICT. However, testing the latest currently-available inbound build, which is after the backout of bug 1239861, I do not see the problem any more.

	Gary [:streetwolf52] Reporter
	Comment 13 • 9 years ago

I am on the latest inbound hourly and still have the problem:

http://archive.mozilla.org/pub/firefox/tinderbox-builds/mozilla-inbound-win64-pgo/1453379543/

	Gary [:streetwolf52] Reporter
	Comment 14 • 9 years ago

(In reply to Gary [:streetwolf] from comment #13)
> I am on the latest inbound hourly and still have the problem:
> 
> http://archive.mozilla.org/pub/firefox/tinderbox-builds/mozilla-inbound-
> win64-pgo/1453379543/

The backout hasn't made it here yet.

	Jonathan Kew [:jfkthame]
	Comment 15 • 9 years ago

That doesn't have the backout yet. If you try the build from http://archive.mozilla.org/pub/firefox/tinderbox-builds/mozilla-inbound-win64/1453395202/ I think it'll probably be fixed (though performance will be worse, as that's not a PGO build... those take a lot longer to appear).

	Gary [:streetwolf52] Reporter
	Comment 16 • 9 years ago

While I'm at it is there any difference between the inbound win64-PGO and the normal win64 inbound?

	Gary [:streetwolf52] Reporter
	Comment 17 • 9 years ago

We collided so I got my answer :-)

	Jim Jeffery not reading bug-mail 1/2/11
	Comment 18 • 9 years ago

Just tested with m-c win32 build cset: https://hg.mozilla.org/mozilla-central/rev/66e07ef46853 

This is fixed by backout...

	Gary [:streetwolf52] Reporter
	Comment 19 • 9 years ago

Working again on my end.