Why new kernels is worse than previous ones?

[mesahin]

Hello Everybody

 I tried to find best kernel.I have  three different kernel version which i tested on same board IMX6Q with QT cinematic experience app.There are huge differences each others. Firstly Kernel 3-14-28 version better than others because yellow ball is moving fluently and smooth.And This kernel can reach 60 FPS. But Secondly Kernel 4-1-15 the ball is freze sometimes like blink when it is moving at 52 FPS.Strangely The ball is moving faster than others.Finally Kernel 4-14-69 have same problem like 4-1-15 but 4-14-69 can reach just  30 fps .

 I expected new version kernels would be better.

 What is the problem?

I need to solve freze and increase FPS?

How can i solve them?

Kernel Versions	3-14-28	4-1-15	4-14-69
Video	Fluent	Freeze	Freeze
FPS	60	52	30
Ball Speed	Normal	Faster	Normal

Kernel Version 3-14-28

Kernel Version 4-1-15

Kernel Version 4-14-69

[igorpadykov]

Hi Muhammet

reason may be that new kernels include many bug fixes, which are described

in Release Notes included in linux documentation, for example check Table 9. New features

"Bug Fixes" attached Release Notes

i.MX Software and Development Tools | NXP 

also one can check https://community.nxp.com/message/1031643?commentID=1031643#comment-1031643 

Best regards
igor
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[mesahin]

Hello Igor

I wanna build kernel 3-14-52 but tq-support github site (https://github.com/tq-systems/meta-tq) doesnt have that kernel version.

How can i can build it?

Best Regards.

[Niebel-TQ]

Hi Muhammet,

we did not release a yocto BSP at the time this kernel was released. Please contact our support team (<Support@tq-group.com>)

Best Regards

Markus

[igorpadykov]

Hi Muhammet

for tq-github software suggest to apply to tq-support.

NXP supports only linux from source.codeaurora.org/external/imx/linux-imx

repository linux-imx - i.MX Linux kernel 

i.MX Software and Development Tools | NXP 

Best regards
igor