Bug 377536

Summary:	Tearing on Intel HD Graphics 4400 on intel and modesetting driver
Product:	[Plasma] kwin	Reporter:	Lemmiwinks <a.lembke>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version First Reported In:	5.8.6
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Output of command in filename.

Description Lemmiwinks 2017-03-12 19:37:26 UTC

Since upgrading from plasma 5.8.4 to 5.8.6 on Fedora 25, I get tearing when scrolling, watching videos in windowed mode or fullscreen, moving windows around etc., so pretty much whenever something is moving.
I have only a single screen setup (HP Laptop). Changing from intel 2.99xx driver to kms did not change anything. Changing kwin's Vsync settings does not improve the situation. 
Mesa is version 13.0.4, kernel is 4.9.13-200.

Comment 1 Martin Flöser 2017-03-13 05:24:49 UTC

Please provide the output of:
qdbus org.kde.KWin /KWin supportInformation

Comment 2 Lemmiwinks 2017-03-13 19:27:30 UTC

Created attachment 104543 [details]
Output of command in filename.

Here is the requested output. Thanks!

Comment 3 Martin Flöser 2017-03-14 17:08:49 UTC

Could you give a try with OpenGL 2 (the default) in the compositor 
settings. We have made very mixed results with Intel and Core profile in 
general.

Comment 4 Lemmiwinks 2017-03-14 17:14:12 UTC

Just tried it out, unfortunately no improvement.

Comment 5 Lemmiwinks 2017-03-14 17:46:58 UTC

I tried out a fresh user profile but with the same results.

Comment 6 Christoph Feck 2017-03-18 02:42:29 UTC

I checked the diff between KWin 5.8.4 and KWin 5.8.6. There is nothing changed that could relate to this issue.

Did you update something else? Mesa?

Comment 7 Lemmiwinks 2017-03-18 21:21:00 UTC

Actually it I installed a bunch of updates, that's right. I think there was also a new (minor) kernel version and also minor Mesa update. Does dnf have a log of all recently updated packages?
I will wait for Mesa 17 and X.Org Server 1.19.3 in Fedora stable and report back.

Comment 8 Christoph Feck 2017-03-24 20:14:43 UTC

Well, you should rather go back to previous versions to confirm which package update broke it. You cannot assume that later versions will be any different.

Comment 9 Christoph Feck 2017-03-31 17:35:14 UTC

Need information which package update introduced tearing.

Comment 10 Lemmiwinks 2017-03-31 21:18:35 UTC

I downgraded to mesa 12.0.3 and Xorg 1.19.0 with no change in results.
I forgot to mention that HP Elitebook 840 G1 also has a discrete GPU, AMD Radeon HD 8750M, but I'm not using it.

Comment 11 Lemmiwinks 2017-04-04 18:41:41 UTC

Problem is fixed with the latest packages!
I'm on kernel 4.10.8-200, mesa 13.0.4 and Xorg 1.19.3.
I guess the kernel update fixed the problem.