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FS#55718 - [linux] 4.12.x series kernel results in choppy gnome animations

Attached to Project: Arch Linux
Opened by Harish (sitwano) - Saturday, 23 September 2017, 16:07 GMT
Last edited by Doug Newgard (Scimmia) - Sunday, 24 September 2017, 15:25 GMT
Task Type Bug Report
Category Kernel
Status Assigned
Assigned To Tobias Powalowski (tpowa)
Jan Alexander Steffens (heftig)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 0
Private No



Ever since I started using 4.12.x series kernels I've experience general choppiness in gnome animations. This has been detailed in the forum discussion found here:

Granted that gnome shell animations itself can be choppy in general (especially the overview), I have found that switching to an LTS kernel such as 4.9.51-lts has substantially improved the animation quality in gnome to an extent that I feel animations are acceptably smooth.

Other information:
I have not compiled the mainstream kernel from The kernels that I've tested with are kernels that I installed from arch linux repo.

Steps to reproduce:
1.) Install linux 4.12.13-1 or recent kernel (less than one month old)
2.) observe low fps fade-in/out animations when opening/closing gnome applications

Steps to fix:
1.) Install 4.9.51-lts linux kernel
2.) observe smooth transitions fade-in/out when opening/closing gnome applications
This task depends upon

Comment by loqs (loqs) - Saturday, 23 September 2017, 19:12 GMT
4.12 is now end of life can you reproduce the issue on 4.13?
Unless you can demonstrate it is a packaging or integration issue I doubt any action will be taken as a result of this bug report.
Comment by Harish (sitwano) - Saturday, 23 September 2017, 20:42 GMT
Yes it is reproduceable on the 4.13.2 kernel as well.

edit: Sorry, tested it on the zen kernel.
Comment by Stefan (steinwanderer) - Wednesday, 04 October 2017, 14:58 GMT
Maybe try to boot with "intel_iommu=igfx_off". intel_iommu is enabled by default now.