Revert back to old FIRMWARE and question about CPU

[Ric0207]

Is it possible to go back to OLD FIRMWARE? It seems so laggy right now specially on the UI my xperia z3 compact is alot smoother does all the xperia z3+ users experience this? and why is it sometimes 2 of the cores says "Stopped" when i view it on CPU-Z? Is that normal or my unit is faulty?

[_alexdon_]

There is a huge thread about downgrading:

/t5/Software-Updates/Downgrade-Z3-compact-and-others-from-Lollipop-to-KitKat/m-p/955640#U955640

Please take a look there before creating other topics.

[Ric0207]

I got other question on my topic mr.moderator, Is that normal to have 2 CPUS "Stopped" when viewed on CPU-Z?

[_alexdon_]

I think that is what latest generation of CPUs can do, practically if not needed,other cores will be idle.

[Ric0207]

[_alexdon_]

There have been other topics in the past:

/t5/Xperia-T2-Ultra-T2-Ultra-Dual/How-can-I-know-the-complete-CPU-information-of-my-Xperia-Device/m-...

/t5/Xperia-SP/CPU-core-1-Stopped/td-p/501037/page/2

I am not sure with the octa core CPU,but I think it is the same scenario. Perhaps @Johan knows more. Also,you can get in touch with sony:

http://www.sonymobile.com/global-en/support/contact-us/

[Ric0207]

Why is the UI seems really smooth on Xperia z3 Compact while the CPU is alot older, Is this a trend on Xperia devices? or should i just sell this xperia z3+ and get xperia z3 instead

[nfs2010]

I have Z3+, Z2, & ZL. Z3+ is the fastest one by a long shot. I think you probably want to do a 'repair' through PC companion. It should clean up all the junks (back up your data though :D). 

It's also perfectly normal to see few cores in stopped state using CPU-Z or other apps. If all cores are running to handle nomral apps, then it's actually a problem and will cause battery drain. It's just a like V8 car driving through slow traffic where half of the cylinders get shut off to improve the fuel mileage. 

[Ric0207]

The drop down quick toggles seems a lil bit laggy by a few frames than my compact. But when i tried my co-workers regular z3 its the same thing pretty laggy on that drop down quick toggles menu. Did you experience those as well?

[nfs2010]

Not sure what you meant by the 'lag' here. Are you talking about the two pulls it takes to get to the quick toggles? Also what's your FW version?