846073 - Text appears to go out of focus, similar to if it were of lower resolution.

Status: RESOLVED DUPLICATE of bug 812695

(Firefox :: Untriaged, defect)

Description

[ctbrokaw]

Attachment: firefox bug report.jpg

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0
Build ID: 20130201065344

Steps to reproduce:

Browsing. Happened without clicking, but may be connected to scrolling or mouse-over. Noticed on multiple pages including somethingawful.com, cnn.com, weather.com and this bug report page. The attached picture shows what happened when I clicked in the "summary" field above, and it is repeatable.


Actual results:

Text randomly appears to turn fuzzy, almost as if it went out of focus or the screen had a lower resolution. Sometimes it's a few words, sometimes a whole line, or an entire paragraph. Highlighting the text will switch it back to normal, as will mouse-over, even if it doesn't have a mouse-over action. On Weather.com, a picture next to some text also went "out of focus" when the text did too.


Expected results:

Nothing, the text should not change randomly, as if the computer thinks I'm zoomed out or on a smart phone.

Comment 1

[Kevin Brosnan [Ex-Mozilla]]

Is this an issue if you update to Firefox 19? Providing a copy of help > troubleshooting info would be great.

Comment 2

[ctbrokaw]

Just updated to Firefox 19 and rebooted, still happens. Thinking back, when I shut down my computer this morning on my way to work, windows installed something instead of shutting down immediately. Maybe there is a conflict with a windows update or some other program that was waiting for a reboot. I haven't installed any new add-ons to Firefox recently and haven't messed around with my video card or monitor settings.

Here's the troubleshooting info:


  Application Basics

        Name
        Firefox

        Version
        19.0

        User Agent
        Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0

        Build Configuration

          about:buildconfig

  Extensions

        Name

        Version

        Enabled

        ID

        Adblock Plus
        2.2.3
        true
        {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

        DownThemAll!
        2.0.15
        true
        {DDC359D1-844A-42a7-9AA1-88A850A938A8}

        Menu Editor
        1.2.7
        true
        {EDA7B1D7-F793-4e03-B074-E6F303317FB0}

        Silvermel and Charamel XT
        1.5.5
        true
        [e-mail]

        Youtube ratings preview
        1.08
        true
        [e-mail]

        Logitech Flow Scroll
        4.00.33
        false
        {5D3F3872-91E9-4d59-AD9F-AA174A3145DD}

  Important Modified Preferences

      Name

      Value

        accessibility.typeaheadfind
        true

        accessibility.typeaheadfind.flashBar
        0

        browser.cache.disk.capacity
        358400

        browser.cache.disk.smart_size.first_run
        false

        browser.cache.disk.smart_size.use_old_max
        false

        browser.cache.disk.smart_size_cached_value
        358400

        browser.places.smartBookmarksVersion
        4

        browser.search.useDBForOrder
        true

        browser.startup.homepage
        http://mail.yahoo.com/

        browser.startup.homepage_override.buildID
        20130215130331

        browser.startup.homepage_override.mstone
        19.0

        browser.tabs.onTop
        false

        browser.zoom.full
        false

        extensions.lastAppVersion
        19.0

        font.name.serif.x-western
        Tahoma

        gfx.direct3d.prefer_10_1
        true

        network.cookie.prefsMigrated
        true

        places.database.lastMaintenance
        1361446557

        places.history.expiration.transient_current_max_pages
        50607

        places.history.expiration.transient_optimal_database_size
        167772160

        plugin.disable_full_page_plugin_for_types
        application/pdf

        privacy.donottrackheader.enabled
        true

        privacy.sanitize.migrateFx3Prefs
        true

        security.warn_viewing_mixed
        false

  Graphics

        Adapter Description
        ATI Radeon HD 4600 Series

        Adapter Drivers
        aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64

        Adapter RAM
        1024

        Device ID
        0x9490

        Direct2D Enabled
        true

        DirectWrite Enabled
        true (6.2.9200.16492)

        Driver Date
        4-19-2011

        Driver Version
        8.850.0.0

        GPU #2 Active
        false

        GPU Accelerated Windows
        1/1 Direct3D 10

        Vendor ID
        0x1002

        WebGL Renderer
        Google Inc. -- ANGLE (ATI Radeon HD 4600 Series)

        AzureCanvasBackend
        direct2d

        AzureContentBackend
        direct2d

        AzureFallbackCanvasBackend
        cairo

  JavaScript

        Incremental GC
        true

  Accessibility

        Activated
        false

        Prevent Accessibility
        0

  Library Versions

        Expected minimum version

        Version in use

        NSPR
        4.9.4
        4.9.4

        NSS
        3.14.1.0 Basic ECC
        3.14.1.0 Basic ECC

        NSSSMIME
        3.14.1.0 Basic ECC
        3.14.1.0 Basic ECC

        NSSSSL
        3.14.1.0 Basic ECC
        3.14.1.0 Basic ECC

        NSSUTIL
        3.14.1.0
        3.14.1.0

Comment 3

[Loic]

Reporter, could you try with HWA disabled, please.
see http://support.mozilla.org/en-US/kb/forum-response-disable-hardware-acceleration (restart Firefox to apply)

In addition, I think bug 846130 is dupe to this current bug.

Comment 4

[ctbrokaw]

That seems to have fixed it, toggled it on and off a few times and the results seem consistent. 

Checked the other bug report, and yep, my computer installed windows update KB2670838 yesterday morning, right before this started happening.

Thanks for the help.

Comment 5

[Loic]

Thanks for the feedback,  even if disabling HWA is a poor workaround with recent GPU because it's a useful feature. When the issue will be fixed, try to enable HWA again.