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Hardware acceleration in Windows 10 is not working - NVIDIA

  • 6 replies
  • 31 have this problem
  • Last reply by philipp

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High CPU usage on Youtube - hardware acceleration not working. (Windows 10 - NVIDIA)

about:support -

Firefox -

Chrome -

Edge -

High CPU usage on Youtube - hardware acceleration not working. (Windows 10 - NVIDIA) about:support - Firefox - Chrome - Edge -

All Replies (6)

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hi, it is unfortunate, but since this driver version is responsible for a widespread crashing issue for people updating to windows 10, it is blocklisted for hardware acceleration, until this problem is resolved...

however the issue on youtube might be of a different nature - if you look at your graphics section in about:support it says "supports hardware h264 decoding: false", which sounds a bit like bug 1178098

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Hi philipp,

With regard to the youtube issue, it is only that when I updated my Firefox did the problem exists. Even the appearance of fonts were affected as I think because of the DirectWrite.

Just a note. All browsers posted above used HTML5 during the test.

Thank you

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yes, it is expected that the change is just recognizable after the update to firefox 40, since 39 was not tweaked to process win10 specific blocklist entries yet.

in case you didn't have a crashing problem before, you might look at in order to re-enable Direct2D/layers acceleration.

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I came with an interesting yet confusing result. I tried to force enable the blocked graphics features:

- webgl.force-enabled=true. - webgl.msaa-force=true. - layers.acceleration.force-enabled=true. - gfx.direct2d.force-enabled=true.

Then after restarting Firefox, it would only display a white screen with only the minimize, maximize and close buttons present. So I run Firefox into safe-mode and revert the graphics features to disabled.

- Now the "supports hardware h264 decoding: false" is set to "true" - Fonts returned to normal even if DirectWrite is still disabled in the config. - CPU usage on youtube returned to normal.

about:config - Normal CPU usage -

However using this test produced another result -

Before - High CPU usage (30%+) 30-45fps After - Lower CPU usage but still higher than normal (28%) but 60fps

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This seems to now be fixed with the release of FF 40.0.2, when used in conjunction with Nvidia Windows 10 (355.60 for desktops) drivers.

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the blocklist entry for the nvidia driver was removed - this isn't tied to a particular release, since firefox installations will update the blocklist once every day...