1305529 - Gmail horizontal line of pixels missing

Status: RESOLVED INCOMPLETE

(Core :: Graphics, defect, P3)

Description

[Kevin Brosnan [Ex-Mozilla]]

Attachment: gmail-bug.png

Some horizontal lines in Gmail are missing pixels. I think this is a recent regression or gmail change. In the screenshot every mail item in the list displays this problem. I have also seen it in the view single message Window.



Graphics
--------

Features
Compositing: Direct3D 11
Asynchronous Pan/Zoom: wheel input enabled; touch input enabled
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) Iris(TM) Graphics 540 Direct3D11 vs_5_0 ps_5_0)
WebGL2 Renderer: Google Inc. -- ANGLE (Intel(R) Iris(TM) Graphics 540 Direct3D11 vs_5_0 ps_5_0)
Hardware H264 Decoding: No; Hardware video decoding disabled or blacklisted
Audio Backend: wasapi
Direct2D: true
DirectWrite: true (10.0.14393.0)
GPU #1
Active: Yes
Description: Intel(R) Iris(TM) Graphics 540
Vendor ID: 0x8086
Device ID: 0x1926
Driver Version: 20.19.15.4454
Driver Date: 5-4-2016
Drivers: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32
Subsys ID: 07041028
RAM: Unknown

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo

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

accessibility.force_disabled: 1
accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 4
browser.download.importedFromSqlite: true
browser.places.smartBookmarksVersion: 8
browser.sessionstore.upgradeBackup.latestBuildID: 20160926030203
browser.startup.homepage: about:home
browser.startup.homepage_override.buildID: 20160926030203
browser.startup.homepage_override.mstone: 52.0a1
browser.urlbar.maxRichResults: 12
browser.urlbar.userMadeSearchSuggestionsChoice: true
dom.apps.lastUpdate.buildID: 20160721030216
dom.apps.lastUpdate.mstone: 50.0a1
dom.apps.reset-permissions: true
dom.mozApps.used: true
dom.push.userAgentID: d0ec6cdd3d8d4f279bd32125f2afc39e
extensions.lastAppVersion: 52.0a1
font.internaluseonly.changed: false
gfx.crash-guard.d3d11layers.appVersion: 45.0.1
gfx.crash-guard.d3d11layers.deviceID: 0x1926
gfx.crash-guard.d3d11layers.driverVersion: 20.19.15.4331
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
gfx.crash-guard.status.d3d9video: 2
gfx.direct3d.last_used_feature_level_idx: 0
media.benchmark.vp9.fps: 188
media.benchmark.vp9.versioncheck: 1
media.gmp-eme-adobe.abi: x86_64-msvc-x64
media.gmp-eme-adobe.lastUpdate: 1460413427
media.gmp-eme-adobe.version: 17
media.gmp-gmpopenh264.abi: x86_64-msvc-x64
media.gmp-gmpopenh264.lastUpdate: 1470762341
media.gmp-gmpopenh264.version: 1.6
media.gmp-manager.buildID: 20160926030203
media.gmp-manager.lastCheck: 1474908813
media.gmp-widevinecdm.abi: x86_64-msvc-x64
media.gmp-widevinecdm.lastUpdate: 1470762343
media.gmp-widevinecdm.version: 1.4.8.903
media.gmp.storage.version.observed: 1
media.hardware-video-decoding.failed: false
network.cookie.cookieBehavior: 3
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1474910470
places.history.expiration.transient_current_max_pages: 115774
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.clearOnShutdown.passwords: false
privacy.cpd.offlineApps: true
privacy.cpd.siteSettings: true
privacy.popups.showBrowserMessage: false
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.timeSpan: 4
privacy.trackingprotection.pbmode.enabled: false
security.sandbox.content.tempDirSuffix: {af015843-f284-482a-bb75-6f3ca382d62d}
security.ssl.errorReporting.automatic: true
services.sync.declinedEngines:
services.sync.engine.prefs.modified: false
services.sync.lastPing: 1474906043
services.sync.lastSync: Mon Sep 26 2016 12:57:07 GMT-0700 (Pacific Standard Time)
services.sync.numClients: 3
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1473891252
ui.osk.debug.keyboardDisplayReason: IKPOS: Keyboard presence confirmed.


Sandbox
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Content Process Sandbox Level: 2

Comment 1

[Ryan VanderMeulen [:RyanVM]]

Kevin, can you please try to narrow this down with mozregression (or confirm it being a change on their end)?

Comment 2

[Kevin Brosnan [Ex-Mozilla]]

I saw this for a couple days in a row. Now it is gone. I don't know what happened. Will reopen if I see this again.