1202245 - Occasional nearly blank page after minimizing another full screen application

Status: NEW

(Core :: Graphics, defect, P3)

Description

[John Navas]

Attachment: Firefox painting bug.jpg

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150826023504

Steps to reproduce:

1. Firefox running, several tabs open.
2. Open and use another application with a maximized window.
3. Close that other application.

OS Name	Microsoft Windows 8.1 Pro
Version	6.3.9600 Build 9600
System SKU	LENOVO_MT_20BX_BU_Think_FM_ThinkPad T450s
Processor	Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz, 2594 Mhz, 2 Core(s), 4 Logical Processor(s)
Installed Physical Memory (RAM)	8.00 GB
Name	Intel(R) HD Graphics 5500
Driver Version	10.18.14.4206



Actual results:

Firefox occasionally reappears showing a mostly blank page (example attached).
That page repaints slowly with clicking in the Firefox window.

Operation is otherwise normal.
Rare event, on the order of weekly.
Seems to happen only when other app has (a) maximized window and (b) high system resource usage.
Latest case happened on Windows 8.1, but I have also observed it on Windows 10.


Expected results:

Firefox should have reappeared showing the page that is open.

Comment 1

[Justin [:JW_SoftvisionQA]]

Is this bug still an issue in FX44.0 or Nightly 47.0a1?

Comment 2

[John Navas]

It looks like this bug has now been fixed.

Comment 3

[John Navas]

That was premature. No sooner did I post that then I shut down the full screen app, restored Firefox, and while most of the windows was OK, the the Window control icons (top right corner) were missing. (Tried to capture a screenshot, but OneDrive interfered. Color me seriously ****.)

Comment 4

[John Navas]

p.s. This is on Windows 7 Pro x64.
The full screen app was running in Compatibility Mode, which may be a factor.

Comment 5

[u279076]

(In reply to John Navas from comment #4)
> p.s. This is on Windows 7 Pro x64.
> The full screen app was running in Compatibility Mode, which may be a factor.

Does this happen with any application or is it just specific applications that seem to trigger this? Does running those applications in normal execution mode (ie. not compatibility mode) replicate the issue? Does this happen if you turn off hardware acceleration in Firefox?

Comment 6

[John Navas]

Attachment: Top of Firefox window showing blank area.

Note the missing Window control buttons.

Comment 7

[John Navas]

Happened again, uploaded new screenshot: Top of Firefox window showing blank area.
1. Only application currently causing this is Microsoft game Age of Empires The Asian Dynasties.
2. This application will only run in Windows 7 Compatibility Mode AFAIK.
3. Have not tried turning off hardware acceleration. Will try that.
p.s. This problem has occurred on different laptops, one with Intel HD Graphics 5500 graphics, this one with NVIDIA NVS 4200M graphics.

Comment 8

[John Navas]

Attachment: Top of Firefox window with hardware acceleration off.

If anything, problem is worse with hardware acceleration off.

Comment 9

[John Navas]

I've noticed this seems to happen most often when:
1. Firefox running minimized with game full screen in compatibility mode.
2. Quit game, system returns to normal mode.
3. Restore Firefox.