pavrw Reporter
	Description • 9 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; .NET4.0C; .NET4.0E; rv:11.0) like Gecko

Steps to reproduce:

Just installed 38.0a1 (2015-01-25) but when running, all pages appear in blank


Actual results:

All pages are blank, developer tools show elements, and even JavaScript is running


Expected results:

The page should be visible.

	Paul Silaghi, QA [:pauly]
	Comment 1 • 9 years ago

Please check if the issue occurs using Firefox in safe mode (with your addons disabled):
http://support.mozilla.com/kb/Safe+Mode

And on a new, empty profile:
http://support.mozilla.org/en-US/kb/Managing-profiles#w_starting-the-profile-manager

	pavrw Reporter
	Comment 2 • 9 years ago

(In reply to Paul Silaghi, QA [:pauly] from comment #1)
> Please check if the issue occurs using Firefox in safe mode (with your
> addons disabled):
> http://support.mozilla.com/kb/Safe+Mode
No. In safe mode the pages are properly shown.


> And on a new, empty profile:
> http://support.mozilla.org/en-US/kb/Managing-profiles#w_starting-the-profile-
> manager
Yes. It's also happening.
However, I noticed that:

 - open tab #1 to any url (got a blank!)
 - open #2 with another url (another blank)
 - close tab #x and reopen it
 - now every tab is shown properly after switching

MAGIC!

	Chris Peterson [:cpeterson]
	Comment 3 • 9 years ago

pavrw: can you copy/paste your about:support page info into this bug? Open "Help" menu > "Troubleshooting Information" menu item > "Copy text to clipboard" button.

	pavrw Reporter
	Comment 4 • 9 years ago

Application Basics
------------------

Name: Firefox
Version: 38.0a1
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0
Multiprocess Windows: 1/1

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports (including 2 pending crashes in the given time range)

Extensions
----------

Graphics
--------

Adapter Description: Radeon X300/X550/X1050 Series (Microsoft Corporation - WDDM)
Adapter Drivers: atiumdag atiumdva atiumd64 atiumd6a atitmm64
Adapter RAM: Unknown
ClearType Parameters: Gamma: 2200 Pixel Structure: B ClearType Level: 50 Enhanced Contrast: 400
Device ID: 0x5b63
Direct2D Enabled: Blocked for your graphics driver version. Try updating your graphics driver to version 9.6 or newer.
DirectWrite Enabled: false (6.2.9200.16571)
Driver Date: 4-25-2009
Driver Version: 8.56.1.16
GPU #2 Active: false
GPU Accelerated Windows: 0/1 Basic (OMTC) Blocked for your graphics driver version. Try updating your graphics driver to version 9.6 or newer.
Subsys ID: 1490174b
Vendor ID: 0x1002
WebGL Renderer: Blocked for your graphics driver version. Try updating your graphics driver to version 9.6 or newer.
windowLayerManagerRemote: true
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

Important Modified Preferences
------------------------------

browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.frecency_experiment: 2
browser.places.smartBookmarksVersion: 7
browser.sessionstore.upgradeBackup.latestBuildID: 20150129030202
browser.startup.homepage_override.buildID: 20150129030202
browser.startup.homepage_override.mstone: 38.0a1
dom.mozApps.used: true
extensions.lastAppVersion: 38.0a1
media.gmp-gmpopenh264.lastUpdate: 1422549457
media.gmp-gmpopenh264.version: 1.3
media.gmp-manager.lastCheck: 1422549456
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.history.expiration.transient_current_max_pages: 104858
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.sanitize.migrateFx3Prefs: true

Important Locked Preferences
----------------------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.10.8
Version in use: 4.10.8

NSS
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC

NSSSMIME
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC

NSSSSL
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC

NSSUTIL
Expected minimum version: 3.17.4
Version in use: 3.17.4

Experimental Features
---------------------

	Paul Silaghi, QA [:pauly]
	Comment 5 • 9 years ago

Could you try turning HWA OFF ?
https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_turn-off-hardware-acceleration

	pavrw Reporter
	Comment 6 • 9 years ago

(In reply to Paul Silaghi, QA [:pauly] from comment #5)
> Could you try turning HWA OFF?
> https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-
> problems#w_turn-off-hardware-acceleration

After disabling HWA, seems its not happening any more. Will HWA need to be disabled (If I don't change anything) on future releases? Consider this is happening on nightly but not on stable.

Thanks!

	Paul Silaghi, QA [:pauly]
	Comment 7 • 9 years ago

(In reply to pavrw from comment #6)
> Will HWA need to be
> disabled (If I don't change anything) on future releases? Consider this is
> happening on nightly but not on stable.
Let's hope the problem gets fixed until then.
One other question: do you have e10s enabled in nightly? If yes, do you reproduce the problem with e10s OFF and HWA ON ?

	pavrw Reporter
	Comment 8 • 9 years ago

(In reply to Paul Silaghi, QA [:pauly] from comment #7)
> One other question: do you have e10s enabled in nightly?
Yes

> If yes, do you reproduce the problem with e10s OFF and HWA ON ?
No.
Seems it's a e10s + HWA issue.

	pavrw Reporter
	Comment 9 • 9 years ago

remove needinfo flag

	Milan Sreckovic [:milan] (needinfo for best results)
	Comment 10 • 8 years ago

This is somewhat strange - we already block the acceleration (see comment 4), but things further improve when we explicitly turn on layers.acceleration.disabled (by disabling HWA acceleration in the prefs.)

Benoit, can you check if fully blocked device/driver combinations work properly with E10S, on one of the lab machines?

pavrw: is this still a problem for you on nightly or any of the other releases, with acceleration preference enabled?

	Chris Peterson [:cpeterson]
	Comment 11 • 8 years ago

Nominating for retriage in case pavrw or Benoit determine this is still a problem.

	Jim Mathies [:jimm]
	Comment 12 • 8 years ago

Milan, no response here for a while..

	Milan Sreckovic [:milan] (needinfo for best results)
	Comment 13 • 8 years ago

Is it still happening?  The bug's 15 months old.

	Jim Mathies [:jimm]
	Comment 14 • 8 years ago

Please reopen if you're still seeing this.