I see the same flickering on NVIDIA hardware. Intel seems to be fine.
On 08/21/2015 03:06 PM, Alexander Ploumistos wrote:
On Fri, Aug 21, 2015 at 11:33 AM, Martin Stransky <stransky@xxxxxxxxxx> wrote:
- Install Firefox 40 on Fedora 22,23,Rawhide (you'd need Gtk3 build)
- go to about:config, click to any key and add a new one, boolean type. The
new key name is "layers.use-image-offscreen-surfaces" and set it to true.
- enable "layers.offmainthreadcomposition.enabled" which may be disabled
now.
What about "layers.acceleration.force-enabled"?
And you're set now. Please report any oddity (different than the usual ones
:)) at #BZ.
On my desktop (f22), with a GeForce 9800 GT and the 340.76 driver from
nVidia I am getting a lot of flickering when I scroll through some
pages (e.g. MDN, Ars Techinca, gmail) especially when they contain
fixed or sticky elements or elements whose background image is
repeated along the x and y axes. If you can get your hands on similar
hardware, scroll through this:
https://developer.mozilla.org/en-US/docs/Web/CSS/position
On a recent laptop (f22), with nVidia and Intel dual graphics, there
is no such problem on either adapter.
I have been unable to reproduce the crashes we were investigating so
far, so perhaps enabling "layers.use-image-offscreen-surfaces" could
be a solution (and I should get a newer graphics card - anyone cares
to get me a late birthday present?).
This is the graphics information provided by firefox for the desktop:
Adapter Description NVIDIA Corporation -- GeForce 9800 GT/PCIe/SSE2
Asynchronous Pan/Zoom none
Device ID GeForce 9800 GT/PCIe/SSE2
Driver Version 3.3.0 NVIDIA 340.76
GPU Accelerated Windows 0/1 Basic (OMTC)
Supports Hardware H264 Decoding false
Vendor ID NVIDIA Corporation
WebGL Renderer NVIDIA Corporation -- GeForce 9800 GT/PCIe/SSE2
windowLayerManagerRemote true
AzureCanvasBackend cairo
AzureContentBackend cairo
AzureFallbackCanvasBackend none
AzureSkiaAccelerated 0
and for the laptop:
Adapter Description NVIDIA Corporation -- GeForce GTX 860M/PCIe/SSE2
Asynchronous Pan/Zoom none
Device ID GeForce GTX 860M/PCIe/SSE2
Driver Version 4.5.0 NVIDIA 352.21
GPU Accelerated Windows 0/1 Basic (OMTC)
Supports Hardware H264 Decoding false
Vendor ID NVIDIA Corporation
WebGL Renderer NVIDIA Corporation -- GeForce GTX 860M/PCIe/SSE2
windowLayerManagerRemote true
AzureCanvasBackend cairo
AzureContentBackend cairo
AzureFallbackCanvasBackend none
AzureSkiaAccelerated 0
Adapter Description Intel Open Source Technology Center -- Mesa DRI
Intel(R) Haswell Mobile
Asynchronous Pan/Zoom none
Device ID Mesa DRI Intel(R) Haswell Mobile
Driver Version 3.0 Mesa 10.6.3 (git-ccef890)
GPU Accelerated Windows 0/1 Basic (OMTC)
Supports Hardware H264 Decoding false
Vendor ID Intel Open Source Technology Center
WebGL Renderer Intel Open Source Technology Center -- Mesa DRI
Intel(R) Haswell Mobile
windowLayerManagerRemote true
AzureCanvasBackend cairo
AzureContentBackend cairo
AzureFallbackCanvasBackend none
AzureSkiaAccelerated 0
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