yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S Duos] cysmsgt123:
WiFi not working GT-S7562L

Hi guys, I been having a hard time getting my wifi to work on my samsung GT-S7562L.

Ever since I installed CWM 11 and updated from 4.0.4 to 4.4.4 Kitkat everything went flawlessly. But only one problem I noticed thus far, and that is the wifi is locked out in the settings menu. When I navigate to it says, "Turning Wi-Fi on.." and stays like that forever. So I can't use the internet it is pretty useless. I also tried setting the region code to USA, Canada, Brazil and Europe. And restarted each time with no fix. I also cleared the settings cache and still wifi don't work. I reverted from 4.04 to 4.4.4 three times already --cleaned installed as followed directions in this thread.

Now that I done all this I can't boot in CWM 11 20150323-UNOFFICIAL or twrp 2.8.6.1. I hold the vol-up+down + home+ power button and it won't do anything anymore. The only thing that works is vol-down+ home+power button which only loads the "download" screen. I used Odin and used the recovery.zip and let it auto-reboot. But only loads cyanogen mod. I can' wipe or factory reset my phone to revert anymore since I used to be able to.

Any help? All I want is for the WiFi to work other wise I would go back to 4.0.4 ICS. If however there is a fix for the WiFi on Cyanogenmod unofficial I would be happy and just keep it there. Thanks :fingers-crossed:

If you guys need any more info please let me know.

Summary:

GT-S7562 (my original phone is GT-S7562L but CM is showing it without the "L".)

CyanogenMod version: 11-201550323-UNOFFICAL-kylessopen

Android version: 4.4.4

Bseband version: S7562LVJANET

Kernal version: 3.0.60-majonez-gf726a27-dirty

andrew@Core2Mac.local #3

Build number: cm_kylessopen-userdebug 4.4.4 KTU84Q b523c97f2d test-keys

SELinux status: enforcing.
[Samsung Galaxy S Duos] kengnatural:
Odin does not understand .zip files. The file should have .tar.md5 extension. Try to download and flash the CWM recovery with Odin mentioned in the first page of this thread. Then flash twrp recovery with CWM.
[Samsung Galaxy S Duos] cysmsgt123:
My mistake. I meant I used Odin to PDA recovery.tar not zip. I have two files, one is "recovery.tar" and the other is "kyleopen-cwm5-v3.tar.md5". I used Odin and PDA "kyleopen-cwm5-v3.tar.md5" after that it PASS. It reboots and I turn it off. I hold the volume keys up+down, home and power button and I can't boot to twrp or CWM. Nothing happens now. I can't flash anything anymore.
[Samsung Galaxy S Duos] kengnatural:
Have you tried to flash the stock rom with Odin?
[Samsung Galaxy S Duos] cysmsgt123:
Yes, actually I just did that right now. I used, "stock_recovery.tar" with Odin. It booted up cyanogenMod and I turned it off. I hold the volume keys up+down + home + power button and nothing happens. :crying:

It keeps booting into cyanogenMod and never goes to twrp or cwm.
[Samsung Galaxy S Duos] kengnatural:
I mean the full stock rom not just recovery.
[Samsung Galaxy S Duos] cysmsgt123:
I went to Odin, PDA and used "S7562LVJANE1_S7562LZTOANE1_S7562LVJANE1_HOME.tar.md5". Would that be the full stock rom? If not then no. But whenver I try to downgrade back using Odin for "S7562LVJANE1_S7562LZTOANE1_S7562LVJANE1_HOME.tar.md5" Odin gives me a FAIL.
[Samsung Galaxy S Duos] yadhuuk:
let me ask ,r u able to boot in cm 11,or bootlooped at boot animation,my answer is if u r able to boot then use terminal comment to boot into recovery just type "reboot recovery"that may help u,or use recovery tool to flash recovery.img from ur device and try to boot into recovery mode
[Samsung Galaxy S Duos] cysmsgt123:
Alright I got it working I went from 4.4.4 kitkit to 4.0.4 ICS. Should I try this again to go to 4.4.4 CyanogenMod unofficial or is GT-S762L unsupported for WiFi? No wifi for me the phone is useless.

So now I went back to factory wipe and my phone works now. I got rid of CyanogenMod because WiFi is not supported. Unless there is a fix I can do? Seems there is not-- nothing fixes the wifi for GTS762L on CM11 unofficial.
[Samsung Galaxy S Duos] kengnatural:
You should read the author's notes carefully before trying any ROM. This is from the first page of this thread (OP): "WiFi not works on L version, I need a tester."
[Samsung Galaxy S Duos] cysmsgt123:
I can I become a tester and will there ever be a wifi fix for the L version? It say L is supported but no wifi. I will like to help future improvements.
[Samsung Galaxy S Duos] .rootCoder.:
Hello! here's an another ghost who's useally behind the scenes and rarely appears.

Well, it seems that he feels sorry about that, anyway.

-------Just Ignore whats ^^^^^^ UP-------------

The community is doing a great job for our phone. Special thanks to KlinkONE and kengnatural who are the most active now.

I just would like to tell that cm11's KK sources are EOL, and may only recive bugfixes.

May we think to make a little change in this phone to bring it to the next version? as android 6 M is already out and N is being developed(developer preview exists for nexus devs).

Well, i know that what is said are just somewhat "dreams", however, it's not that hard to achieve them.

Thanks and regards....

.rCDmHD.
[Samsung Galaxy S Duos] 57rosrus@gmail.com:
RR

До колкото можах да прочета тук, никой не се притеснява, че основната камера и FM радиото няма да работят, ще има проблем с блутута и фенерчето ... Според мен е по-добре без тази измишльотина - да се инсталира софтуер, който не отговаря на възможностите на хардуера... Когато програмиста направи така, че да няма недостатъци, да ми пише на ros57@abv.bg
[Samsung Galaxy S Duos] :
Recently I tried to connect my phone with a Bluetooth speaker

After pairing

It get connected ,connection last for 3 second after that Bluetooth disconnects and restarts
[Samsung Galaxy S Duos] kengnatural:
Thanks for the report. Could you please, activate the logcat, reproduce the error and attach the output here for investigation?
[Samsung Galaxy S Duos] :
Get the logcat hear

http://www22.zippyshare.com/v/PQYMxr7s/file.html

Sorry unable to post as attachment
[Samsung Galaxy S Duos] balindam bajpai:
though we all are eager to get a major update from kitkat either L or M but the developers are trying hard first to fix all bug fixes for cm11,and then only will they switch over to another ROM, so be patient for some time and we hope much more from the developers,and matter of fact they have given us so much by helping us so kudos to them.
[Samsung Galaxy S Duos] douhung:
pls forgive my impatience. :mad: I post the following questions in Q&A http://xdaforums.com/s7562/help/qa-...tkat-4-4-4-t3024960/post66177359#post66177359. I understand I ask some very novice questions but I really don't know how to start. :crying: I cross post my questions below hoping that this thread may have more traffic and experts. :cowboy::cowboy::cowboy: thank you in advance! :good::good::good:

I am a newbie on android and custom rom. I have the following questions:

do I need to backup my stock firmware or app data before I flash stock hun firmware with Odin? if so, should I backup the stock firmware or just app data?

I am from Hong Kong. in the samsung website there is stock firmware based on Hong Kong. is there any problem if I flash stock hun firmware?

I use both English and Chinese in my phone. it has chinese display and chinese keyboard including handwriting. after flashing the stock hungarian and the Unofficial CM11 firmware, can I read and input chinese? or do I need to install chinese app or chinese keyboard?

many thanks for your kind effort in providing the custom ROM and support!!! :)
[Samsung Galaxy S Duos] balindam bajpai:
so u are on stock ROM and non-rooted na?

---------- Post added at 02:46 PM ---------- Previous post was at 02:38 PM ----------

if you are on stock rom first Root your device and install cwm recovery using odin following the procedure given in the link below :-

www.idroidspace.com/how-to-root-samsung-galaxy-s-duos-s7562-and-install-cwm-recovery/

*root your device using the link above

*install custom recovery(cwm)

*download the twrp recovery zip file given in the OP of this thread and flash it in cwm

*now download the Hungarian modem zip file given in the OP and flash it in twrp

*wipe data(factory reset)

*having done so flash the cm11 latest built

*wipe cache/dalvik cache

*reboot

*enjoy.
[Samsung Galaxy S Duos] KlinkOnE:
You dont need root beforehand

Gesendet von meinem GT-S7562
[Samsung Galaxy S Duos] billysam:
wifi can't connect

Tried cm-11-20160305-UNOFFICIAL-kylessopen-physical-primary today on my S7562, no GAPPS installed, no other modification. purely your stock rom zip. on clean flash.

couldn't connect to my wifi network. got authorization failed.(password is correct)

the moment I press connect, the wifi signal strength drops from full to one, even when I am sitting near the router.

tried to keep logcat sleek and easy for you to find. check the end of the file page. ;)

this build although solved my previous buggy experience with the ril network on the earlier build I tested.

(it even used to happens on some of my stock rom builds, so all good now.)

will test some more when get free time. good job guys. I might be able to finally switch to kk. thanks to the the devs.

Have a Good Day
[Samsung Galaxy S Duos] balindam bajpai:
what do you mean?
[Samsung Galaxy S Duos] kengnatural:
You don't need to root your current working rom in order to flash another rom or recovery.
[Samsung Galaxy S Duos] balindam bajpai:
i am talking about the stock rom not custom roms.

i know they are pre-rooted.
[Samsung Galaxy S Duos] kengnatural:
You are right that custom roms are pre-rooted.

But in your procedure the very first step about rooting the stock rom is not necessary for subsequent steps. [MENTION=5484648]KlinkOnE[/MENTION] did mean it.
[Samsung Galaxy S Duos] balindam bajpai:
okay
[Samsung Galaxy S Duos] billysam:
Am I the only one facing a wifi connection problem on s7562 latest physical build? If I have read right it's a bug stated for s7562L builds or is it for both?

It's working fine on earlier build for me, just checked flashing earlier build of the rom.

All fine now
[Samsung Galaxy S Duos] balindam bajpai:
is anyone developing the ROM still?

---------- Post added at 05:10 AM ---------- Previous post was at 05:09 AM ----------

@kengnatural all fine now, no random reboot problem now,i think it is fixed now with turning off zram.
[Samsung Galaxy S Duos] billysam:
Yesterday I faced a problem on physical build again, I installed app on my device. I restarted my device and it was gone. after that I couldn't install apps, i forgot to take copy of logcat. but it wouldn't write to /data partition.

I tried moving apps manually to data/data/app folder, it was successful. what is wrong with the physical build or is it just my device?

apart from the old bugs, has there been any other new bugs that I am missing?

I couldn't catch up nicely with the latest twrp 2.8.0.1 and physical build development.

---------- Post added at 11:57 AM ---------- Previous post was at 11:39 AM ----------

@KlinkOnE [MENTION=4056424]kengnatural[/MENTION] could you guys tell me why there is no default.conf and even the sound folder missing from the etc folder Rom package?
[Samsung Galaxy S Duos] kengnatural:
You are reporting the things that I've not faced before. And the bugs you reported seems to be unrelated to each other. Usually these unlogical bugs are the result of intermittent hardware failure, for example sudden CPU hanging or flash chip error, etc. Can you check you max. CPU frequency? How you solved the wifi problem?

You said that you restarted your device? How did you restart your phone (from the phone restart menu or other method)?

I've been using this physical primary build for several month and faced with no problem. If your problem started after some phone crash or hang, then try to reflash again the ROM and remove the file

/system/etc/init.d/01backgroundwriteout. It increases the background write cache in order to make file I/O faster but it also increases the risk of data lost in case of system crash.

There is no difference between physical-primary build and normal build besides external sdcard usage.

---------- Post added at 10:56 AM ---------- Previous post was at 10:45 AM ----------

According to androidfilehost statistics I see 2246 downloads of the latest build (1990 normal + 256 primary-physical) by this time.

Only 11 downloads of zramoff.zip file. And only one report about its effect :) It means that the number of the users who suffer from random reboot issue is not high. It is interesting to know the observations of other 10 users who downloaded the zramoff.zip :)
[Samsung Galaxy S Duos] billysam:
I highly doubt my device rather than your physical build rom. that's why I said I'm the only one or there are other facing issues. :D

I have experimented a lot on this device, so can't blame anyone else.

I always restart my device from the power menu, shut down. no unexpected shutdown. for reboot I choose power button, restart. I increased the cpu frequency to 1.3.

The wifi isssue, I don't know what solved it, but I think it might have been because of flashing s7560 rom builds earlier.

I performed a full wipe of my device, yesterday using my troubleshooting guide myself. formatted my external sdcard as well

performed a clean flash. and it solved. :o

You're right the build is much better now and almost no big issues here with the Rom. there were none crashing error or hang issue, no random reboots. I will test more again with lowering the CPU frequencies. and deleting the backgroundwriteout file. thank you for the tip off. will surely work this out.

You mean if I delete /system/etc/init.d/01backgroundwriteout? it will turn into normal build or there are more files changed/added between the two builds? I ask this because I will have better chance of troubleshooting the issues at hand on my device.

last thing I pointed out is no default_gain.conf file or the /system/etc/sound/kylessopen file. you should know what I mean here.
[Samsung Galaxy S Duos] kengnatural:
I suspect that the main reason of your device's uneven behaviour is this. Try to decrease it to 1Ghz and use for some time. For example my device works normally till 1.19Ghz but no more. Also in summer when environment temperature is relatively high 1.19Ghz is also unstable sometime (for my device). That's why I always use 1Ghz.

No, 01backgroundwriteout is my (testing) tweak for increasing background write cache for increasing I/O rate (to decrease lagging). This is not related to the primary-physical build. You can use this tweak on normal build too to see if it makes any difference. If your CPU is stable after decreasing its frequency to normal, there is no need to delete this file.

To better understand how primary physical differs from emulated sdcard please see the following link:

https://source.android.com/devices/storage/config-example.html

Unfortunately I cannot answer this question by now because I did not develop this part. May be [MENTION=5484648]KlinkOnE[/MENTION] knows.

In my spare time I'll try to investigate and find answer. But if you can investigate and find the answer it would be very nice.
[Samsung Galaxy S Duos] billysam:
Thank You, the link you provided cleared all my confusions and doubts. I will solve my issues now. get rid of my personal stock modified Rom, backup my datas.

I have few additions lined up for the cm11 build, but couldn't experiment nicely because of unforeseen bugs. Will surely keep up updating from my side as well.
[Samsung Galaxy S Duos] kengnatural:
Nice to hear that you're going to be involved actively :good:
[Samsung Galaxy S Duos] kher paandiyan:
[MENTION=4056424]kengnatural[/MENTION] there is no random reboot issues now. Sorry i forgot about this issue in these days. :D Thanks for your work :good:
[Samsung Galaxy S Duos] kengnatural:
Thanks for your report.

Actually I was not sure that this was the reason of random reboots. Just suspected, tested on my phone and wanted others' results about it to find some corellation between zram and random reboot. Nice to see that at least for two persons reboot frequency decreased.
[Samsung Galaxy S Duos] pkyadav:
When I was using SGS5 experience ROM and when the active swap size increased then the phone reboot automatically.
[Samsung Galaxy S Duos] #bilal:
I got stuck in boot loop after sometime when I flash this rom
[Samsung Galaxy S Duos] kengnatural:
Just reporting about fault is not enough.

Could you please give more info?

What build of the rom? Please provide step by step procedure about how did you flash the rom in order to see if you missed something.
[Samsung Galaxy S Duos] billysam:
You reported this in mighty rom as well.

Make sure you are not charging the mobile when you're flashing the rom. Only connect charger after it boots up.

For older builds you should flash from twrp 2.7.0.0.

For latest builds rom twrp 2.8.0.1.

Follow the instruction mentioned in the OP properly and it will boot up.
[Samsung Galaxy S Duos] kengnatural:
A little correction: twrp 2.8.0.1 is necessary only for f2fs support. You can use twrp 2.7.0.0 with latest builds too.

If you don't format your partitions with f2fs I'd like to recomend to use twrp 2.7.0.0 as 2.8.0.1 has a bug - sometimes it failes during restore.
[Samsung Galaxy S Duos] ashishfzd123:
md5 File Error

There is some problem in md5 File

Odin Showing md5 File error
[Samsung Galaxy S Duos] kher paandiyan:
[MENTION=4056424]kengnatural[/MENTION] i could face random reboots again.. For the past 3 days while pressing the lock key to make device to sleep. I think it maybe because of network issue because reboots always happened while the network operators are set to automatic. When network operators are set to manual i didnt receive any reboots but the data connection disconnects at most of the time.
[Samsung Galaxy S Duos] kengnatural:
If it is possible to reproduce the error could you please take logcat? Just activate logcat and reproduce the error.
[Samsung Galaxy S Duos] kher paandiyan:
Can you please tell me how to do it.
[Samsung Galaxy S Duos] billysam:
The latest build has cache partition being used above 100mb, is it being used as a swap memory? if I want to stop using that space in cache memory?
[Samsung Galaxy S Duos] kengnatural:
The cache partition is used as a dalvik cache for the system applications, i.e. for applications in /system/app directory.
[Samsung Galaxy S Duos] billysam:
Thank you for the prompt answer. That does help in performance, as well as it's absolutely safe step too. Genius men!!

I was looking for the reason behind my weird ghost app data loss issue. still figuring it out. what is wiping my complete app data when I make some random flashes via recovery. It even happened on a simple bootanimation file flashing today.

I have tested until now

on permissive mode- with Zramoff and 01backgroundwriteout

on permissive mode- without Zramoff and 01backgroundwriteout

Result after some Random flash

only app data was lost, once.

on enforcing mode- with Zramoff and 01backgroundwriteout.

on enforcing mode- without Zramoff and 01backgroundwriteout as well.

Result after Some Random flash

app data would be wiped completely, system will show no apps installed.

but while browsing with root explorer to root/data/app, I can see apk files there.

Weird thing is

All had randomly once or twice caused app data loss while performing different set of flashing case, bootanimation, kernel, a small script, very basic things, themed app, which doesn't cause trouble the next time I flash it again. :D
[Samsung Galaxy S Duos] KlinkOnE:
The divided dalvik cache was introduced with 20151207 build ;).

The idea behind was to decrease space used by system in /data Partition and make use of free space in /cache. Performance shouldnt be influenced.

This is the safest way as it is provided by the System to do so.

dalvik.vm.dexopt-data-only=0 -thats what enables it

I still dont understand what exactly you are doing when you are having the mentioned Problem.

What are you trying to Flash? Self build zip?

You may provide an updater-script to look at what is going on.

Did you try to fix permissions after flashing?

Anyway i cant remember having something related to this.
[Samsung Galaxy S Duos] kengnatural:
In my opinion you're looking for the reason of the weird behaviour in wrong place. When you flash zip files using TWRP recovery both zramoff and 01backgroundwriteout cannot affect anything, because your android system is not loaded and they are just files in the phone's flash memory, aren't they?
[Samsung Galaxy S Duos] douhung:
Thank you for all your replies to my questions on installation. :good::good::good: I still have the following questions:

1. If I TAKE FULL BACKUP at step 5, do I need to backup before step 1? If so, since my phone is non rooted, should I backup my phone according to the link HOW TO BACKUP YOUR PHONE on: contacts, images, call logs, applications, app data? pls give me some concrete suggestions on how and what to backup before step 1. :confused:

2. (solved) I have a phone with a physical sdcard. as a newbie, should I install S7562 Cyanogenmod 4.4.4 RC3+ or primary-physical configuration. pls excuse me that I don't understand their differences quoted above. :rolleyes:

I got the answer from http://xdaforums.com/showthread.php?p=65464875#post65464875. Thx! kengnatural.

3. (solved) are these the reasons why we must flash the hun firmware in step 1? :cool:
[Samsung Galaxy S Duos] kengnatural:
You take the full backup of your phone using the recovery program, in our case using TWRP, don't you? As TWRP is not installed before step 5, logically you cannot take backup with it. Till the 5th step your stock ROM will be untouched. Only recovery partition will change. Of course you can take backup of your data (contacts, sms, etc.) before the mentioned operations using your stock ROM. But it is not a full backup.
[Samsung Galaxy S Duos] douhung:
thx! kengnatural. :good::good::good:

I plan to take the full backup using TWRP in the 5th step. I am afraid of doing sth wrong so I haven't started even the 1st step! :(

so I should backup my data before the first step by following the backup guides in this forum, right? :eek:
[Samsung Galaxy S Duos] kengnatural:
Without recovery program, yes, you can use the actions intended for non-rooted devices. But when you come to the step 5, you will use TWRP for full backup of your phone. In this step you still can use your stock ROM...

This is nice that you try to carefully analyze and understand all steps before taking actions.

---------- Post added at 09:58 PM ---------- Previous post was at 09:51 PM ----------

For some reason the RIL (Radio Interface Layer) part which is responsible for GSM connection is a little bit different for the phones produced for different regions. As RILs are different, the part of the ROM which works with the RIL part is also differ a bit. The original author of our ROM - [MENTION=4925018]m4jonez[/MENTION] (don't forget to give thanks to him) used the Hungary ROM and adapted the part of CM11 which works with RIL to it. If you use the ROM from another country there is some probability that the RIL will differ, in this case your GSM connection may not work stable.
[Samsung Galaxy S Duos] douhung:
:rolleyes:

Do you mean that I can use the hun stock ROM as if it is the Hong Kong stock ROM? I suppose that the hun stock ROM will erase and replace everything, including my apps and data in my phone, won't it?

certainly I will thank m4jonez once I start installing the CM11 custom ROM. :good::good::good:

just learn that he is from Budapest and you are from Istanbul. :cowboy::cowboy::cowboy:
[Samsung Galaxy S Duos] kengnatural:
I mean the ROM which is used before CM11, in your case it will be the stock Hungary ROM.

But you can try without stock Hungary ROM. Just start from the step 2. If after flashing CM11 you will have problem with GSM connection, you can just flash the Modem.zip file mentioned in OP. This is RIL extracted from stock Hungary ROM.
[Samsung Galaxy S Duos] douhung:
I see. the reasoning becomes much clearer and I understand much deeper now! :cool:

will flashing the Hungary stock ROM or the CM11 custom erase all my apps and data in my phone?