Bug 104414 - (Laptop) Intel Skylake HD530, low fps during pages scroll in browsers with kernel 4.14 or newer
Summary: (Laptop) Intel Skylake HD530, low fps during pages scroll in browsers with ke...
Status: CLOSED DUPLICATE of bug 103497
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-12-30 00:51 UTC by Alex
Modified: 2018-02-13 16:24 UTC (History)
1 user (show)

See Also:
i915 platform: SKL
i915 features:

Attachments
dmesg (225.62 KB, text/plain)
2017-12-30 00:51 UTC, Alex 		no flags Details
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Description Alex 2017-12-30 00:51:00 UTC 
Created attachment 136449 [details]
dmesg

I have low fps during pages scroll in browsers with kernel 4.14 or newer.

Laptop Dell Latitude E5570 (FY38RF2) with i5-6440HQ and Intel HD Graphics 530 (Skylake).

Platform: x86_64
Kernel: 4.14.8-1-ARCH
Linux distribution: Arch Linux
Machine: Dell Latitude E5570 (FY38RF2)
Comment 1 Mark Spencer 2018-01-01 13:43:41 UTC 
Possibly related to https://bugzilla.kernel.org/show_bug.cgi?id=198241
Comment 2 Elizabeth 2018-01-02 19:59:25 UTC 
Hello Alex,
On bug that Spencer mentioned, they point to commit dc911f5bd8aacfcf8aabd5c26c88e04c837a938e as the culprit of the issue, could you confirm if this is also your case?? 
Thank you.
Comment 3 Alex 2018-01-03 13:52:55 UTC 
Elizabeth, yes, seems like a performance degradations. Glxgears with kernel < 4.14  - 60+ fps, with kernel > 4.14 - ~48 fps. 

In my case, this is mostly observably during pages scroll in browsers. Xorg or wayland - it doesn't matter.

But in Unigine tests kernels 4.13 and 4.14 have ~same results. Really strange bug.
Comment 4 Alex 2018-01-03 14:05:12 UTC 
Sorry, i don't know how to build kernel without this commit. If you have fixed kernel or some guide, than I can try to test.

>> Glxgears with kernel 4.13 - 60+ fps, with kernel 4.14 - 48 fps. 
fixed
Comment 5 Elizabeth 2018-01-05 15:23:02 UTC 
Could you try patch suggested in https://bugs.freedesktop.org/show_bug.cgi?id=103497#c8, with latest stable or tip??
https://www.kernel.org
https://cgit.freedesktop.org/drm-tip
Comment 6 Alex 2018-01-06 22:31:53 UTC 
(In reply to Elizabeth from comment #5)
> Could you try patch suggested in
> https://bugs.freedesktop.org/show_bug.cgi?id=103497#c8, with latest stable
> or tip??
> https://www.kernel.org
> https://cgit.freedesktop.org/drm-tip

Yes, patch solved the problem.
Comment 7 Elizabeth 2018-01-08 16:28:10 UTC 

*** This bug has been marked as a duplicate of bug 103497 ***

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