1237617 - Window white/empty on launch/start if User Account Control (UAC) panel open, parts visible if mouse mover over them (hover)

Status: VERIFIED FIXED

(Core :: Graphics, defect)

Description

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Attachment: screenshot of issue

Firefox 43 - Nightly 46.0a1 on Windows 8.1 64 bit

If Firefox gets launched and opens its first window while the screen is blocked by a User Account Control prompt to modify the computer, the window will be empty and only reveal elements if one moves the mouse over them (after one has canceled or confirmed the prompt).

Steps to reproduce:
1. Schedule a Firefox launch (e.g. with Task scheduling or copy a profile and launch Firefox with that from a script or just slow startup on a HDD might be enough).
2. Trigger a UAC to confirm a modification to the computer (e.g. turning anti-virus off; haven't tested with dialog for execution of file from remote source). 
3. Wait some seconds until Firefox should have launched.
4. Cancel prompt.

Intel HD Graphics 10.18.14.4332, Nvidia 361.43

Graphics
--------

Adapter Description: Intel(R) HD Graphics 4600
Adapter Description (GPU #2): NVIDIA GeForce GTX 765M
Adapter Drivers: igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter Drivers (GPU #2): nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter RAM: Unknown
Adapter RAM (GPU #2): 2048
Asynchronous Pan/Zoom: none
Device ID: 0x0416
Device ID (GPU #2): 0x11e2
Direct2D Enabled: true
DirectWrite Enabled: true (6.3.9600.18123)
Driver Date: 11-20-2015
Driver Date (GPU #2): 12-16-2015
Driver Version: 10.18.14.4332
Driver Version (GPU #2): 10.18.13.6143
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 35371558
Subsys ID (GPU #2): 35371558
Supports Hardware H264 Decoding: Yes
Vendor ID: 0x8086
Vendor ID (GPU #2): 0x10de
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

Comment 1

[Sotaro Ikeda [:sotaro]]

I confirmed the problem.

Comment 2

[Sotaro Ikeda [:sotaro]]

When BasciCompositor is used, the problem does not happen. From it, rendering result is not stored in platform side when the problem happened.

Comment 3

[Sotaro Ikeda [:sotaro]]

After UAC close, when the Firefox became foreground, nsWindow received only the following WM_ events.

> WM_NCACTIVATE
> WM_WINDOWPOSCHANGING
> WM_WINDOWPOSCHANGED

Comment 4

[Sotaro Ikeda [:sotaro]]

To delay firefox start, I used "timeout 10 && ./mach run".

Comment 5

[Sotaro Ikeda [:sotaro]]

Attachment: patch - Call nsWindow::ForcePresent during going active

Comment 6

[Sotaro Ikeda [:sotaro]]

Comment on attachment 8742704 [details] [diff] [review]
patch - Call nsWindow::ForcePresent during going active

:jrmuizel, can you review the patch?

Comment 7

[Jeff Muizelaar [:jrmuizel]]

Comment on attachment 8742704 [details] [diff] [review]
patch - Call nsWindow::ForcePresent during going active

Review of attachment 8742704 [details] [diff] [review]:
-----------------------------------------------------------------

Throwing this at Bas as he ForcesPresent more than I do :)

Comment 8

[Bas Schouten (:bas.schouten)]

Comment on attachment 8742704 [details] [diff] [review]
patch - Call nsWindow::ForcePresent during going active

Review of attachment 8742704 [details] [diff] [review]:
-----------------------------------------------------------------

I can't think of any issues with this. Let's try it.

Comment 9

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/c28104d75b3d

Comment 10

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/mozilla-central/rev/c28104d75b3d

Comment 11

[Cornel Ionce [:noni] [Hubs QA]]

Confirming that this issue no longer reproduces on Windows 8.1 x64 using Fx 49.0b7, build ID: 20160825132718.