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YouTube full screen slow, but only if it's the ACTIVE window

Posted

My RX 580 arrived yesterday and replaced my old GTX 770. It does a fantastic job at gaming so far and overall I'm satisfied with it. My monitor is a 1440p@144Hz monitor that supports FreeSync, which is the primary reason why I upgraded to an AMD card instead of a new nVidia one.

But there's one huge issue that doesn't make any dang sense to me:

Watching YouTube videos at 720p or above in full screen puts severe stutter to them. But that's not the main head scratcher: it only happens when Firefox is the active window! So when I turn on full screen and then click on a blank space on my secondary monitor, the video playbacks completely fine. When I click back into the video the stuttering kicks in again.

It's not like the card isn't capable of rendering the videos fast enough. Heck, it does 4K@60FPS just fine when I click away from video. It's only when I set focus to Firefox that it does this obnoxious stuff.

The problem definitely lies within Hardware Acceleration (not a real surprise, really). It does not happen in Safe Mode, but manually disabling all add-ons and themes changes nothing. Disabling HA fixes the issue somewhat, but it introduces consistent sluggishness to Firefox as a whole, so not a suitable workaround.

It also doesn't happen in Chrome or even Edge. I've already updated my drivers to the latest version and also played around with FreeSync, GPU scaling, and whatnot. All to no effects.

Any ideas?

DxDiag file: https://pastebin.com/FyeuZaWn

My RX 580 arrived yesterday and replaced my old GTX 770. It does a fantastic job at gaming so far and overall I'm satisfied with it. My monitor is a 1440p@144Hz monitor that supports FreeSync, which is the primary reason why I upgraded to an AMD card instead of a new nVidia one. But there's one huge issue that doesn't make any dang sense to me: Watching YouTube videos at 720p or above in full screen puts severe stutter to them. But that's not the main head scratcher: it only happens when Firefox is the active window! So when I turn on full screen and then click on a blank space on my secondary monitor, the video playbacks completely fine. When I click back into the video the stuttering kicks in again. It's not like the card isn't capable of rendering the videos fast enough. Heck, it does 4K@60FPS just fine when I click away from video. It's only when I set focus to Firefox that it does this obnoxious stuff. The problem definitely lies within Hardware Acceleration (not a real surprise, really). It does not happen in Safe Mode, but manually disabling all add-ons and themes changes nothing. Disabling HA fixes the issue somewhat, but it introduces consistent sluggishness to Firefox as a whole, so not a suitable workaround. It also doesn't happen in Chrome or even Edge. I've already updated my drivers to the latest version and also played around with FreeSync, GPU scaling, and whatnot. All to no effects. Any ideas? DxDiag file: https://pastebin.com/FyeuZaWn

Additional System Details

Installed Plug-ins

  • Shockwave Flash 25.0 r0

Application

  • Firefox 52.0.2
  • User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
  • Support URL: https://support.mozilla.org/1/firefox/52.0.2/WINNT/de/

Extensions

  • Application Update Service Helper 2.0 (aushelper@mozilla.org)
  • Awesome Screenshot - Capture, Annotate & More 3.0.18 (jid0-GXjLLfbCoAx0LcltEdFrEkQdQPI@jetpack)
  • Customize about:newtab 1.3.0 (customizenewtab@alejandrobrizuela.com.ar)
  • Disable Prefetch 1.0 (disable-prefetch@mozilla.org)
  • Disable TLS Certificate Transparency 1.0 (disable-cert-transparency@mozilla.org)
  • Download Status Bar 15.0.0.1 ({6c28e999-e900-4635-a39d-b1ec90ba0c0f})
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  • Google™ Translator 0.5.4 (jid1-dgnIBwQga0SIBw@jetpack)
  • Greasemonkey 3.10 ({e4a8a97b-f2ed-450b-b12d-ee082ba24781})
  • Lazarus: Form Recovery 2.3.1-signed.1-signed (lazarus@interclue.com)
  • Multi-process staged rollout 1.12 (e10srollout@mozilla.org)
  • Pocket 1.0.5 (firefox@getpocket.com)
  • Reddit Enhancement Suite 5.4.3 (jid1-xUfzOsOFlzSOXg@jetpack)
  • Site Deployment Checker 1.0 (deployment-checker@mozilla.org)
  • Stylish 2.0.7 ({46551EC9-40F0-4e47-8E18-8E5CF550CFB8})
  • Toggle animated GIFs 1.3.1 (giftoggle@simonsoftware.se)
  • transparent-standalone-images 0.1.1-signed.1-signed (jid0-ezUl0hF1SPM9hLO5BMBkNoblB8s@jetpack)
  • uBlock Origin 1.12.1 (uBlock0@raymondhill.net)
  • Undo Closed Tabs Button 4.0.1 (undoclosedtabsbutton@supernova00.biz)
  • Web Compat 1.0 (webcompat@mozilla.org)
  • TryAgain 3.4.6.1-signed.1-signed ({992791ee-61dc-7b98-a8fd-dc49b7deeee9}) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription: Radeon RX 580 Series
  • adapterDescription2:
  • adapterDeviceID: 0x67df
  • adapterDeviceID2:
  • adapterDrivers: aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
  • adapterDrivers2:
  • adapterRAM: 8192
  • adapterRAM2:
  • adapterSubsysID: 34181462
  • adapterSubsysID2:
  • adapterVendorID: 0x1002
  • adapterVendorID2:
  • crashGuards: []
  • currentAudioBackend: wasapi
  • direct2DEnabled: True
  • directWriteEnabled: True
  • directWriteVersion: 10.0.14393.953
  • driverDate: 4-10-2017
  • driverDate2:
  • driverVersion: 22.19.157.3
  • driverVersion2:
  • featureLog: {u'fallbacks': [], u'features': [{u'status': u'available', u'description': u'Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'HW_COMPOSITING'}, {u'status': u'available', u'description': u'Direct3D11 Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'D3D11_COMPOSITING'}, {u'status': u'disabled', u'description': u'Direct3D9 Compositing', u'log': [{u'status': u'disabled', u'message': u'Disabled by default', u'type': u'default'}], u'name': u'D3D9_COMPOSITING'}, {u'status': u'available', u'description': u'Direct2D', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'DIRECT2D'}, {u'status': u'available', u'description': u'Direct3D11 hardware ANGLE', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'D3D11_HW_ANGLE'}]}
  • info: {u'AzureCanvasAccelerated': 0, u'AzureCanvasBackend': u'direct2d 1.1', u'AzureFallbackCanvasBackend': u'cairo', u'AzureContentBackend': u'direct2d 1.1'}
  • isGPU2Active: False
  • numAcceleratedWindows: 1
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  • supportsHardwareH264: Yes; Using D3D11 API
  • webgl2Renderer: Google Inc. -- ANGLE (Radeon RX 580 Series Direct3D11 vs_5_0 ps_5_0)
  • webglRenderer: Google Inc. -- ANGLE (Radeon RX 580 Series Direct3D11 vs_5_0 ps_5_0)
  • windowLayerManagerRemote: True
  • windowLayerManagerType: Direct3D 11

Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
FredMcD
  • Top 10 Contributor
4222 solutions 58918 answers

Is this just with Youtube? What about other websites?

https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

Is this just with Youtube? What about other websites? https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

Question owner

FredMcD said

Is this just with Youtube? What about other websites? https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

It also happens with Vimeo, so I assume the problem isn't limited to YouTube. Only HTML5 seems to be affected by it, Flash works fine.

''FredMcD [[#answer-961807|said]]'' <blockquote> Is this just with Youtube? What about other websites? https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues </blockquote> It also happens with Vimeo, so I assume the problem isn't limited to YouTube. Only HTML5 seems to be affected by it, Flash works fine.
FredMcD
  • Top 10 Contributor
4222 solutions 58918 answers
See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Question owner

FredMcD said

See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

That fixed it, though it took some time. I was on the latest graphics driver all the time and since you wrote the comment too. AMD have released an optional update today that seemingly fixed it.

''FredMcD [[#answer-961898|said]]'' <blockquote> See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration </blockquote> That fixed it, though it took some time. I was on the latest graphics driver all the time and since you wrote the comment too. AMD have released an optional update today that seemingly fixed it.
FredMcD
  • Top 10 Contributor
4222 solutions 58918 answers

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

Hello, I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily. Thank you for contacting Mozilla Support.