Develop Bugs

[Q] Bricked Phone, Cannot Resolve Problems

Hi,
I've searched and found a few threads with information, but I'm unable to make any progress with resolving my issue of a bricked phone due to SEUS 2.3.3 update. The phone is unlocked and rooted. The update process started but didn't finish and no on-screen instructions came up so I assumed it hadn't worked, but the phone won't turn on since.
I'm trying to use binary's flashtool to resolve the bricking issue, however I'm unable to make any progress as the device drivers are incorrect. I've uninstalled them and tried to re-install manually and automatically and both of these methods fail.
I'm using the same desktop running windows 7 which I originally used to unlock/root the phone successfully but windows is now saying the S1 BootLoader device driver cannot be found or installed despite having the correct files on the computer and trying several times.
Any help would be greatly appreciated.

Driver problem resolved.
Problem Flashing below:
19/053/2011 12:53:47 - ERROR - Error flashing. Aborted
19/053/2011 12:53:47 - INFO - Now unplug the device and power it on
19/053/2011 12:53:47 - INFO - Then go to application settings
19/053/2011 12:53:47 - INFO - turn on Unknown Sources and Debugging
I'm unable to turn the phone on (the green light will flash for a second at around 1/2 normal brightness). Debugging and unknown sources were on when the phone was working before the update but I presume the update has changed this.
Is there any way for me to resolve the issue?

1.) You are using the right package?
http://forum.xda-developers.com/showthread.php?t=1126358
This package was updated, so please re-download to be sure you have the right package.
2.) if this doesn't work, please be sure that you don't use a USB-HUB etc. If you use a desktop PC i advice to use the BACKSIDE usb ports.
Regards
Bin4ry
rmg999 said:
Driver problem resolved.
Problem Flashing below:
19/053/2011 12:53:47 - ERROR - Error flashing. Aborted
19/053/2011 12:53:47 - INFO - Now unplug the device and power it on
19/053/2011 12:53:47 - INFO - Then go to application settings
19/053/2011 12:53:47 - INFO - turn on Unknown Sources and Debugging
I'm unable to turn the phone on (the green light will flash for a second at around 1/2 normal brightness). Debugging and unknown sources were on when the phone was working before the update but I presume the update has changed this.
Is there any way for me to resolve the issue?
Click to expand...
Click to collapse

Just before I checked your post I downloaded the new package and something seems to be happening:
20/035/2011 12:35:05 - INFO - <- This level is successfully initialized
20/035/2011 12:35:08 - INFO - Preparing files for flashing
20/035/2011 12:35:09 - INFO - Searching Xperia....
20/035/2011 12:35:09 - INFO - Found at USB\VID_0FCE&PID_ADDE\5&FE88CF0&0&2
20/035/2011 12:35:09 - INFO - Start Flashing
20/036/2011 12:36:15 - INFO -
20/039/2011 12:39:31 - INFO - Flashing loader
I will keep you updated.
Thanks for posting and sharing some knowledge.

Same problem again unfortunately:
20/035/2011 12:35:05 - INFO - <- This level is successfully initialized
20/035/2011 12:35:08 - INFO - Preparing files for flashing
20/035/2011 12:35:09 - INFO - Searching Xperia....
20/035/2011 12:35:09 - INFO - Found at USB\VID_0FCE&PID_ADDE\5&FE88CF0&0&2
20/035/2011 12:35:09 - INFO - Start Flashing
20/036/2011 12:36:15 - INFO -
20/039/2011 12:39:31 - INFO - Flashing loader
20/048/2011 12:48:25 - ERROR - Error flashing. Aborted
20/048/2011 12:48:25 - INFO - Now unplug the device and power it on
20/048/2011 12:48:25 - INFO - Then go to application settings
20/048/2011 12:48:25 - INFO - turn on Unknown Sources and Debugging

I had that problem flashing Xperia Neo. I uninstall all Adobe Flash Player and install last version and X10Flashtool worked ok.

I bricked my phone today. But it's solved now. I used Jarpelea's unbrick pack. I use fastboot instead of flashtool because I find that it is easier.
Sent from my LT15i using Tapatalk

Please also deactivate Virus Scanners & Firewall Tools. This sounds hard like an Windows Problem.
@007Arc: You cannot do THIS restore via fastboot! you really need Flashtool, because you have to write the TA!
Regards

Bin4ry said:
Please also deactivate Virus Scanners & Firewall Tools. This sounds hard like an Windows Problem.
@007Arc: You cannot do THIS restore via fastboot! you really need Flashtool, because you have to write the TA!
Regards
Click to expand...
Click to collapse
Ah k, thought he had same problem like me, sorry then.

triangle with yellow exclamation mark

hi guys i need help asap been trying to research for three or four hours now and i am completely stuck.
The story is i have an arc s generic uk model which was on .42 firmware. however obviously being rooted and stuff i removed system apps etc and i recently i got the ota notifcation for the newer update which obviously cannot be installed unless the firmware is untouched.
now i backed everything up so thats not a problem. I decided to flash .42 firmware via wotanclient and well my phone was fully charged. after flashing had finished i disconnected the usb switched on my device and i got the yellow exclamation mark with the triangle. I found a thread whereby SEUS solved this problem but for me SEUS is saying installation failed please ensure battery is fully charged.
I tried to flash a generic us .42 firmware and well im having no luck. Ill attach the log to this post. im not sure if this error is because of the lt18a and lt18i differences or if it is something else. I also tried doing a straight flash to .62 firmware via wotan but i keep getting errors and im trying to download the ftf file but im having no luck. i dont care about root anymore as long as i can get my phone running again. help me please ive been trying for hours and im stuck. even if i put my phone on charge im in a boot loop to the exclamation point and back all over agian.
thanks in advance.
willing to donate to anyone that helps me solve my problem.
ps here is my flashtool log
01/036/2012 02:36:57 - INFO - <- This level is successfully initialized
01/036/2012 02:36:58 - INFO - Flashtool Version 0.6.8.0 built on 2012-02-26 19:26:25
01/036/2012 02:36:58 - INFO - You can drag and drop ftf files here to start flashing them
01/037/2012 02:37:10 - INFO - Device disconnected
01/037/2012 02:37:19 - INFO - Selected LT18a arc s_2.3.4, 4.0.2.A.0.42_Generic USA.ftf
01/037/2012 02:37:19 - INFO - Preparing files for flashing
01/037/2012 02:37:39 - INFO - Please connect your device into flashmode.
01/037/2012 02:37:46 - INFO - Device connected in flash mode
01/037/2012 02:37:46 - INFO - Opening device for R/W
01/037/2012 02:37:47 - INFO - Reading device information
01/037/2012 02:37:47 - INFO - Phone ready for flashmode operations.
01/037/2012 02:37:47 - INFO - Start Flashing
01/037/2012 02:37:47 - INFO - Flashing loader
01/037/2012 02:37:49 - INFO - Loader version : R4A066 / Bootloader status : ROOTED
01/037/2012 02:37:49 - INFO - Flashing adsp.sin
01/037/2012 02:37:49 - ERROR - ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ERR_STATIC="SIN_HEAD_VER";ERR_DYNAMIC="Failed to verify sin header";
01/037/2012 02:37:49 - ERROR - Error flashing. Aborted
01/037/2012 02:37:50 - INFO - Device connected in flash mode
01/037/2012 02:37:52 - INFO - Device disconnected
01/037/2012 02:37:53 - INFO - Device connected in flash mode
01/038/2012 02:38:00 - INFO - Device disconnected

I've got my phone running however all I did was root my phone and now I can't install the .62 ota update. It keeps failing and I haven't done anything at all apart from root.
Sent from my LT18i using Tapatalk

Hey,
When you say it's failing, are you still getting the sin error?
Which version are you using?
I was getting the exact issue on my UK (tmobile) Arc, but I managed to get it working after using the top .62 from this thread: http://forum.xda-developers.com/showthread.php?t=1330314
If you've unlocked your bootloader, OTA updates won't work.
Geef

That happened with me once, I accidentaly flashed an LT15a firmware on my LT15i. Just flashed the right firmware again and it worked tho.

dude try the old flash tool

[Q] how to revert to stock (XPERIA)

i got xperia SL, and i mod it, and now i want to revert it back to stock,
can anyone tell me what all the things i need, and other stuff ?
Thanks
i see some open source file on sony website,
http://developer.sonymobile.com/downloads/xperia-open-source-archives/
can i use one of that same build before to my phone ?
sorry for my english :S

NomNomM said:
i got xperia SL, and i mod it, and now i want to revert it back to stock,
can anyone tell me what all the things i need, and other stuff ?
Thanks
i see some open source file on sony website,
http://developer.sonymobile.com/downloads/xperia-open-source-archives/
can i use one of that same build before to my phone ?
sorry for my english :S
Click to expand...
Click to collapse
Just install sony's flashtool and you don't need anything more...Easiest way to revert back to stock..
READ THE INSTRUCTIONS BEFORE INSTALLING!!!!!
Sent from my iPhone 6 using android 5.0

ap030993 said:
Just install sony's flashtool and you don't need anything more...Easiest way to revert back to stock..
READ THE INSTRUCTIONS BEFORE INSTALLING!!!!!
Sent from my iPhone 6 using android 5.0
Click to expand...
Click to collapse
any link and instructions ? thanks

NomNomM said:
any link and instructions ? thanks
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2032867
Sent from my iPhone 6 using android 5.0

ap030993 said:
http://forum.xda-developers.com/showthread.php?t=2032867
Sent from my iPhone 6 using android 5.0
Click to expand...
Click to collapse
no luck for me, it can detect but no service ,
~Xperia SL

NomNomM said:
no luck for me, it can detect but no service ,
~Xperia SL
Click to expand...
Click to collapse
You have to connect the phone in flashmode
Open the flashtool , switch off your phone , hold vol. down and plug the usb in your pc/laptop ..then it will detect...

i mean i do that, now it says no services
Supported phones & flash keys
In the beta version of the flash tool for Xperia™ devices, only a limited number of phone models and software versions are supported.
Please note that when you connect your phone to the computer to flash the phone, it must be turned off and you must hold the flash key listed below. Flash keys vary between models.
Supported phones and flash key mappings
Xperia™ S – volume down
Xperia™ arc – back
Xperia™ arc S – back
Click to expand...
Click to collapse
here
my devices is not listed :S

NomNomM said:
i mean i do that, now it says no services
here
my devices is not listed :S
Click to expand...
Click to collapse
Ok if that doesnt work , flash one of the available firmwares in development section using flashtool...
Sent from my iPhone 6 using android 5.0

To revert back to stock, just connect to PC Companion and use the Repair function (click on the "Your phone is up to date" link). Warning: all your data will be wiped too.

hush66 said:
To revert back to stock, just connect to PC Companion and use the Repair function (click on the "Your phone is up to date" link). Warning: all your data will be wiped too.
Click to expand...
Click to collapse
no luck, pls see attached images, thats happen.

ap030993 said:
Ok if that doesnt work , flash one of the available firmwares in development section using flashtool...
Sent from my iPhone 6 using android 5.0
Click to expand...
Click to collapse
no available firmware all is for S , nothin for SL

hey i got this
i got a stock ftft file now, so what now ?
pls anyone help me

NomNomM said:
i got a stock ftft file now, so what now ?
pls anyone help me
Click to expand...
Click to collapse
Install flashtool, install drivers
Power off your phone, hold down vol. Down button and plug it in ur pc/laptop , then drag the ftf and drop it in the flashtool, thats it, flashing will start automatically..
Sent from my iPhone 6 using Android 5.0

NomNomM said:
no luck, pls see attached images, thats happen.
Click to expand...
Click to collapse
Use Flashtool.

NomNomM said:
no luck, pls see attached images, thats happen.
Click to expand...
Click to collapse
You should have mentioned that you had unlocked your bootloader. Anyways, just follow what ap030993 mentioned above.

i got this
10/031/2012 20:31:24 - INFO - <- This level is successfully initialized
10/031/2012 20:31:24 - INFO - Flashtool Version 0.9.9.0 built on 2012-11-13 22:53:30
10/031/2012 20:31:24 - INFO - You can drag and drop ftf files here to start flashing them
10/031/2012 20:31:33 - INFO - Device disconnected
10/032/2012 20:32:29 - INFO - Device connected in flash mode
10/033/2012 20:33:04 - INFO - Selected LT26ii_4.0.4_DE_6.1.A.2.45.ftf
10/033/2012 20:33:04 - INFO - Preparing files for flashing
10/033/2012 20:33:09 - INFO - Please connect your device into flashmode.
10/033/2012 20:33:14 - INFO - Device disconnected
10/033/2012 20:33:17 - INFO - Opening device for R/W
10/033/2012 20:33:19 - INFO - Start Flashing
10/033/2012 20:33:19 - INFO - Processing loader
10/033/2012 20:33:19 - INFO - Checking header
10/033/2012 20:33:19 - INFO - Ending flash session
10/033/2012 20:33:19 - ERROR -
10/033/2012 20:33:19 - ERROR - Error flashing. Aborted
10/033/2012 20:33:20 - INFO - Device disconnected
10/033/2012 20:33:23 - INFO - Device connected with USB debugging off
10/033/2012 20:33:23 - INFO - For 2011 devices line, be sure you are not in MTP mode
10/034/2012 20:34:43 - INFO - Device disconnected

2nd try , i off usb debug
10/037/2012 20:37:38 - INFO - <- This level is successfully initialized
10/037/2012 20:37:38 - INFO - Flashtool Version 0.9.9.0 built on 2012-11-13 22:53:30
10/037/2012 20:37:38 - INFO - You can drag and drop ftf files here to start flashing them
10/037/2012 20:37:43 - INFO - Device connected in flash mode
10/037/2012 20:37:55 - INFO - Selected LT26ii_4.0.4_DE_6.1.A.2.45.ftf
10/037/2012 20:37:55 - INFO - Preparing files for flashing
10/038/2012 20:38:01 - INFO - Please connect your device into flashmode.
10/038/2012 20:38:04 - INFO - Opening device for R/W
10/038/2012 20:38:04 - INFO - Reading device information
10/038/2012 20:38:12 - INFO - Unable to read from phone after having opened it.
10/038/2012 20:38:12 - INFO - trying to continue anyway
10/038/2012 20:38:13 - INFO - Start Flashing
10/038/2012 20:38:13 - INFO - Processing loader
10/038/2012 20:38:13 - INFO - Checking header
10/038/2012 20:38:13 - INFO - Ending flash session
10/038/2012 20:38:13 - ERROR - Error in processHeader : 2 : The system cannot find the file specified.
10/038/2012 20:38:13 - ERROR - Error flashing. Aborted
10/038/2012 20:38:13 - INFO - Device disconnected
10/038/2012 20:38:23 - INFO - Device connected with USB debugging off
10/038/2012 20:38:23 - INFO - For 2011 devices line, be sure you are not in MTP mode

Have you plug in your phone into Flashtool in FlashMode?
Do follow the guide I answered in your another thread.
http://forum.xda-developers.com/showthread.php?t=2038445
See you have any problem...

[Q] Unknow device driver error, mid flashtool firmware, Flashing Red

Hello, and thank you in advance for any and all help you can give me here. I am going to attempt to give you all the info I can to the best of my ability.
r800at GSM 12W05 - purchased unbranded / sim unlocked about 1 year ago Locked Bootloader
I almost immediately flashed new firmware and rom Gin2JellyBean -
i dont recall for sure specifics but I am pretty sure it was 2.3.4 version running on the 4.0.2.A.0.42
I had no issues with this install and everything went flawlessly. I do know that in my phone info after this it was recorded as a r800i.
This worked well and I liked it quite a lot until recently most of the new games would lag/ freeze/ crash.
After a great deal of reading I found [Rom][PLAY][PORT][MULTIBOOT] AtoMic GB 7.0 [ The Ultimate Dual Core Experience ]
http://forum.xda-developers.com/showthread.php?t=2219154
and thought it may help with some of my issues.
So yesterday I downloaded -
- Flashtool Windows Edition - v0.9.10.1
- CWM Recovery Installer v.5
- Firmware 4.0.2.A.0.58 Enhanced
I installed the flashtool, fastboot and xperia play drivers from the install folder of flashtool, and installed the USB Flash Driver(Gordons Gate)
I activated debugging mass storage and followed the tutorial 100%. I am running win7 64 on my pc
Upon launching Flashtool I selected the firmware for flash and proceeded to connect my phone while holding back. Everything seemed to be fine, the flashtool began doing its thing and progressed to 40% completion before freezing up and my phone disconnecting from the pc. Windows reported Unknown Device, driver error.
Now a little info on my recollection of the flashtool info, i wish I had taken a screen shot but at the time I didnt know I would need it. So what I recall from the info was that it had progressed to a system file install of some sort, it had completed about 6-10 files and that I found it interesting that the phone info it reported seemed to show a 4.0.2.A.0.62 firmware. That is if I was reading it correctly.
I tried uninstalling and reinstalling Flashtool, drivers, pc companion, I tried older versions of flashtool, but nothing seems to be correcting the unknown device problem. I did multiple restarts/ reboots of both the phone and pc in the process, literally trying everything I could to get it to re connect properly. To no avail.
Now the phone itself, when i try to power it on i get a flashing LED, I am color blind unfortunately But I am 90% sure its a flashing red light.
If I attempt to plug it in my pc installs the SEMC Flash Device driver and I get a green steady charging light. After approximately 30 seconds my phone displays its logo for a few seconds followed by what appears to be a picture of a phone with a triangle warning sign with an exclamation mark in it. That displays for maybe 10 seconds and my pc errors flashing an unknown device - driver issue and the phone led goes back to flashing red.
If there is any other info you need please feel free to ask, ill do my best. And again, thank you so much for the help.

Just figured I would add that I would like to get the bootlader unlocked as well. So if there is any way to incorporate fixing my issue with getting the bootloader unlocked that would be fantastic.
Also I found this from another persons post and made some edits to it so it is as close to what mine said as possible! Besides date time stamp that is.
11/059/2012 15:59:13 - INFO - <- This level is successfully initialized
11/059/2012 15:59:15 - INFO - Flashtool Version 0.9.10.1
11/059/2012 15:59:15 - INFO - You can drag and drop ftf files here to start flashing them
11/059/2012 15:59:25 - INFO - Device disconnected
11/059/2012 15:59:45 - INFO - Selected R800i_4.0.2.A.0.62
11/059/2012 15:59:45 - INFO - Preparing files for flashing
11/000/2012 16:00:27 - INFO - Please connect your device into flashmode.
11/000/2012 16:00:50 - INFO - Device connected in flash mode
11/000/2012 16:00:50 - INFO - Opening device for R/W
11/000/2012 16:00:50 - INFO - Reading device information
11/000/2012 16:00:50 - INFO - Phone ready for flashmode operations.
11/000/2012 16:00:50 - INFO - Start Flashing
11/000/2012 16:00:50 - INFO - Flashing loader
*** 11/000/2012 16:00:53 - INFO - Loader : S1_Loader_Root_773f - Version : R4A066 / Bootloader status : Not Rootable ***** this line im unsure of besides the not rootable part
11/000/2012 16:00:53 - WARN - This file is ignored : simlock.ta
11/000/2012 16:00:53 - INFO - Flashing kernel.sin
11/000/2012 16:00:55 - INFO - Flashing fota1.sin
11/000/2012 16:00:56 - INFO - Flashing fota0.sin
11/000/2012 16:00:57 - INFO - Flashing adsp.sin
11/001/2012 16:01:00 - INFO - Flashing amss_fs.sin
11/001/2012 16:01:00 - INFO - Flashing amss.sin
11/001/2012 16:01:11 - INFO - Flashing system.sin
*** This would be where my progress stopped do to the driver malfunction - 40%
Also I had found this thread before I posted but the information included is extremely vague. I PM the OP in hopes for some help as well.
http://forum.xda-developers.com/showthread.php?t=1252038

Ok so I picked up my phone and tried hitting the power button and I got a different result now.
For some reason, after letting it sit untouched for almost 24 hours the power button now causes a small vibration and logo screen very briefly, but then flashes that phone and exclamation sign symbol and goes dark again.
To be honest im rather scared to try and do anything with it without guidance at this point now.
I really dont want to brick this phone permanently. And am too inexperienced to feel comfortable just randomly trying to reflash.
Is this normal for it to just stop showing red led and seemingly sort of fixing itself?

Any thoughts? Ideas? I just need some guidance so I dont brick this thing for good.. I miss my phone!!

[ArcS] Processing of loader.sin finished with errors

I know, there are plenty of topics for this error, but I didn't found a solution.
I tried the following...
- repair option in PC Companion --> error 2003 (even if I could repair the unlocked phone few weeks ago)
- FlashTool (newest version) stops with this error:
31/053/2015 22:53:56 - INFO - Device connected in flash mode
31/053/2015 22:53:57 - INFO - Opening device for R/W
31/053/2015 22:53:57 - INFO - Reading device information
31/053/2015 22:53:57 - INFO - Phone ready for flashmode operations.
31/053/2015 22:53:57 - INFO - Opening TA partition 2
31/053/2015 22:53:57 - INFO - Current device : LT18i - BX902LM8AB - 1254-2716_R1I - 1246-7916_4.1.B.0.431 - WORLD-i_4.1.B.0.587
31/053/2015 22:53:57 - INFO - Closing TA partition
31/053/2015 22:53:57 - INFO - Start Flashing
31/053/2015 22:53:57 - INFO - Processing loader.sin
31/053/2015 22:53:57 - INFO - Checking header
31/053/2015 22:53:57 - ERROR - Processing of loader.sin finished with errors.
31/053/2015 22:53:57 - INFO - Ending flash session
31/054/2015 22:54:04 - ERROR -
31/054/2015 22:54:04 - ERROR - Error flashing. Aborted
31/054/2015 22:54:04 - INFO - Device disconnected
Click to expand...
Click to collapse
I can flash new kernels (Lupus & CM12.1 kernel), but if I want to go back to the .587 ROM, I can't flash them through FlashTool. Any idea? Bricked?
I always connected the phone after the popup which told me to do so. I also installed all the drivers - the phone is recognized in flash & fastboot mode (using Windows 7).

i have the same ****
try to install an older version http://www.mediafire.com/download/2ut97v5aszylr4w/flashtool-0.9.18.1-windows.exe

Daniel D. said:
I know, there are plenty of topics for this error, but I didn't found a solution.
I tried the following...
- repair option in PC Companion --> error 2003 (even if I could repair the unlocked phone few weeks ago)
- FlashTool (newest version) stops with this error:
I can flash new kernels (Lupus & CM12.1 kernel), but if I want to go back to the .587 ROM, I can't flash them through FlashTool. Any idea? Bricked?
I always connected the phone after the popup which told me to do so. I also installed all the drivers - the phone is recognized in flash & fastboot mode (using Windows 7).
Click to expand...
Click to collapse
You got an error because of latest version of flashtool.
Use only flashtool
18.5 - https://drive.google.com/file/d/0B8q4pCAugmPgZWk0ZkFSTHk4a0E/view
or
18.6 - https://drive.google.com/file/d/0BzVQf67OZ9NtSnlHZEtWTnZ1LWc/view
or
8.0 - http://www.mediafire.com/download/ucczmw37815j2gv/flashtool-0.9.8.0-windows.exe

It worked! Note that Avast thinks that these versions of Flashtool are infected with some malware. Avoid that somehow

I can confirm this worked for me too. I was in the same situation.
My buddy in Canada mailed me his 2011 Xperia Arc as he wanted me to gain root on it. I did that, then unlocked the bootloader (this was carrier branded to Rogers). I had to go the long route for the BL unlocking (the whole "install this program, buy these credits, touch terminals under a panel with a paperclip, etc"). Then I installed CWM Recovery, then installed CyanogenMod 10, Android 4.1.2, but it was buggy as hell and was randomly rebooting. So I decided to try some new ROMs, hopefully more stable. BUT all the ones I wanted required I flash build 4.1.B.0.587 first. So I got the FTF build file needed, got Flash Tool 0.9.19.8, but kept getting the exact same error message, "ERROR - Processing of loader.sin finished with errors." So I tried Sony's Flash Tool, Emma. Then that told me the phone had a locked BL! WTF! I double checked, and that was not true. So then I tried Sony's PC Companion, and their server went down RIGHT after I started getting somewhere... FFUUUUUU!!! So then I found this thread... Got Flash Tool 0.9.18.6, got it all prepped to go (FTF file, drivers, etc), and fired it off... FAILED again. Tried again, this time with phone plugged in from the GET GO and NOT from when Flash Tool tells me to. And guess what, I was able to flash this stock ROM WITHOUT the phone actually being in Flashmode. LOL! What I mean is, when Flash Tool prompted me to hold Back and then plug in the phone, the phone was already plugged in... then BAM, it started working!
Either way, I'm now happy cos I can try out some more stable ROMs.
I hope anyone else in that situation finds this and gets some joy too.

Thanks for all the answers. I ended up installing Legacy Xperia CM 12.1. The only system beside .587 which has an acceptable speed on my Arc S - and up to date!