topic Re: Revert back to old FIRMWARE and question about CPU in XPERIA archive

Revert back to old FIRMWARE and question about CPU

Ric0207 — Wed, 08 Jul 2015 08:29:33 GMT

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?

Re: Revert back to old FIRMWARE?

_alexdon_ — Wed, 08 Jul 2015 08:32:20 GMT

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.

Re: Revert back to old FIRMWARE?

Ric0207 — Wed, 08 Jul 2015 08:35:05 GMT

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

Re: Revert back to old FIRMWARE?

_alexdon_ — Wed, 08 Jul 2015 08:36:07 GMT

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

Re: Revert back to old FIRMWARE?

Ric0207 — Wed, 08 Jul 2015 08:37:31 GMT

Re: Revert back to old FIRMWARE?

_alexdon_ — Wed, 08 Jul 2015 08:40:32 GMT

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-p/647089#M268

/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/

Re: Revert back to old FIRMWARE?

Ric0207 — Wed, 08 Jul 2015 08:40:54 GMT

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

Re: Revert back to old FIRMWARE?

nfs2010 — Thu, 09 Jul 2015 03:15:18 GMT

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.

Re: Revert back to old FIRMWARE and question about CPU

Ric0207 — Thu, 09 Jul 2015 05:59:19 GMT

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?

Re: Revert back to old FIRMWARE and question about CPU

nfs2010 — Thu, 09 Jul 2015 06:35:55 GMT

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?

Re: Revert back to old FIRMWARE and question about CPU

nfs2010 — Thu, 09 Jul 2015 07:09:15 GMT

& if those two stopped cores are really bothering you, try profiling (in advanced mode) using trepn app. You could profile with overlays showing all CPU freq/load, GPU freq./load, etc. CPU 1-4 vitually always run (those are the a53/little cores). So you could just profile antutu or other heavy benchmarks with overalys showing CPU5-8 (A57/big cores) info only. (CPU-Z labels them as Core 4-7 as it starts indexing from 0). All those big cores do run occasionally depending on the workload.

Or you could just take my screenshot and be done with it

Re: Revert back to old FIRMWARE and question about CPU

Ric0207 — Thu, 09 Jul 2015 10:52:33 GMT

No im talking about the transition. . My firmware is 28.0.A. 7.24 what about yours?

Re: Revert back to old FIRMWARE and question about CPU

nfs2010 — Thu, 09 Jul 2015 15:21:58 GMT

I'm on the same FW - zero lag on the stuff you mentioned. Do you have live wallpaper and/or other widgets on your homescreen? Or anything different that your Z3 compact doesn't have? It's certainly caused by some other process running in your background.

Re: Revert back to old FIRMWARE and question about CPU

Ric0207 — Thu, 09 Jul 2015 16:26:12 GMT

Nope what i have on my compact is the same thing that i have on my z3+.. Its probably im just super picky lol.