Closed Bug 1514730 Opened 5 years ago Closed 5 years ago

Scrolling Lag after Force-Enabled Acceleration

Categories

(Core :: Graphics: Layers, defect, P5)

Product:
Core
Component:
Graphics: Layers
Version:
64 Branch
Platform:
x86_64
Linux
Type:
defect

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1383563

People

(Reporter: ali.sherif10, Unassigned)

References

Details

(Keywords: perf, Whiteboard: [gfx-noted]) 

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0

Steps to reproduce:

Enable layers.accelerations.force-enabled.
Launch: DRI_PRIME=1 firefox


Actual results:

At first, the scrolling was normal, then it became that if I stop scrolling for a while in some websites, there'd be lag after scrolling, then I'd see the result of scrolling.

Info:
- OS: Fedora 29 KDE spin (64 bit).
- Laptop: HP Pavilion g6.
- GPU: Intel/AMD Radeon HD 7670M. I used the AMD GPU.
- RAM: 8 GB.

Notes:
- The problem always existed regardless of the distribution.
- It might also exist in Chrome. I'm not sure; I didn't use it for a very long time.
- Hardware acceleration's very important. Please, enable it by default in Linux.


Expected results:

Scrolling is always smooth.
OS: Unspecified → Linux
Hardware: Unspecified → x86_64
Component: Untriaged → General
Blocks: ogl-linux-beta
(In reply to ali.sherif10 from comment #0)
> - Hardware acceleration's very important. Please, enable it by default in Linux.
It's being worked on. You could try out WebRender: https://nightly.mozilla.org, open about:config, set gfx.webrender.all to true and restart Nightly. But there are still a lot of optimizations to come. https://mozillagfx.wordpress.com/ https://hacks.mozilla.org/2017/10/the-whole-web-at-maximum-fps-how-webrender-gets-rid-of-jank/
Component: General → Graphics
Product: Firefox → Core
I did it. You can see my feedback at bug #1278719 comment #35.
After browsing for more than an hour, the lag returned.
Maybe it makes Firefox slower quickly after cache accumulation?
Is it related to my GPU being old?
Component: Graphics → Graphics: Layers
Keywords: perf
Priority: -- → P5
Whiteboard: [gfx-noted]
I used Gecko Profiler on Firefox Nightly from Flatpak. I noticed 2 scrolling lags in https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Profiling_with_the_Built-in_Profiler.
Note: I added DRI_PRIME=1 to the beginning of the launch command to use AMD's GPU.

Result: https://perfht.ml/2BtYJdb.
I think this is a duplicate, because lag happens after waiting for seconds.
Status: UNCONFIRMED → RESOLVED
Closed: 5 years ago
Resolution: --- → DUPLICATE
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