WiFi password loss after each and every reboot on MEIZU Pro 5



  • There are a number of threads about the loss of WiFi password after reboot of the Nexus 5 and of the BQ M10 but not much about the same problem on the MEIZU Pro 5 apart from https://forums.ubports.com/topic/708/meizu-pro5-fastboot-mode-locked

    I have a MEIZU Pro 5 with 4GB of RAM and Ubuntu Touch 16.04 UBports OTA-7. This is not the Ubuntu Touch edition. This phone came with Flyme OS and I installed Ubuntu on it. I need to re-enter the WiFi password after reboot.

    The way this problem occurs is strange because the password is not completely lost. If I open the Settings, go to Wi-Fi and then to the list of Previous networks, my access point is still there and it does have the password. The problem is that when I select this access point in this list, the only option I have is to Forget this network. I can't enable the connection from the list of previous networks.

    In order to connect to this access point, I have to select it from the current list of networks from which the password is lost. Once I enter again the password, the list of Previous networks creates a new entry with the same network name albeit with the suffix " 1" added to it. If I reboot again and do the same thing, a new entry appears once again, this time with the suffix " 2". And so on with the suffixes 3, 4, 5, etc...

    Has anyone found out how to fix the problem since the thread mentioned above?



  • @ubuntoutou I had exactly same problem on Nexus 5 and couldn't solved it. It happened on devel, rc, stable channel, 15.04 or 16.04. And yes, the latest Google firmware was flashed and used prior UT flashing. Anyone to help here?



  • This issue occurs when the partition that holds the MAC and/or IMEI information for a device (commonly called efs) is corrupted or destroyed. Every time the phone boots, it selects a random MAC address for the Wi-Fi interface. Wi-Fi networks are saved by MAC address (since they never change, right?), so you essentially need to recreate the network every time you reboot.

    Once the EFS partition is destroyed, the only way to restore it is to send the device back to the manufacturer or restore a backup. This may be different for your Exynos device, but I'm pretty sure that's how Qualcomm devices work (like yours @Stefano)

    If you check in Settings -> About, does the Wi-Fi address change every time you reboot?



  • @UniSuperBox
    Thanks, you must be right: the Wi-Fi MAC address changes after reboot. The bluetooth MAC address and the IMEI do not change.

    I am surprised that the Wi-Fi MAC address changes because I thought the MAC address was some sort of serial number somehow electronically "etched" on the Wi-Fi chip inside a read-only memory that could not be overwritten.

    Does EFS mean Encrypting File System? Such a system is said to exist on MS Windows systems only.

    I don't know if I have an Exynos or a Qualcomm device. Is it possible to install a command like $ lshw or $ hwinfo to list all the hardware inside the phone?

    Anyway, I don't think I have a backup of EFS, whatever this partition is.



  • @ubuntoutou, you have an Exynos device. The Meizu Pro 5 has an Exynos chipset.

    You can read more about efs here: https://www.kingoapp.com/knowledge-base/what-is-efs.htm

    I'm not sure if this issue is related to the 4GB version of the Pro 5, but we have mentioned in several places that Ubuntu Touch can't be installed on the Android editions of the Pro 5. Problems like this are why. I don't know if we'll be able to fix this for any of these devices... the Pro 5's are quite rare, the 4GB models rarer.



  • @UniSuperBox I had 3 different Pro 5, 2 of them were 64GB versions, one LTE, one TD-LTE and one LTE 32GB version and have never such a problem. None of those devices were Ubuntu Touch edition. So the issue might be somewhere else? Maybe a different wifi chip/version/revision and therefore not fully compatible?



  • @UniSuperBox
    @UniSuperBox But my Nexus 5 works just fine on Android(any ROM) so how can the efs partition get corrupted, I don't know. I might try to restore the efs from Android backup, will see if that helps. Thanks for the tip. Did not check the wifi address, might do that as well.



  • @Stefano Hm, this doesn't make sense then. If it works with Android sending to manufacturer is certainly not an option here. If that's the case then it would mean the EFS doesn't get destroyed but rather Ubuntu Touch has issues reading it.

    @UniSuperBox Would there be a way for users to debug this somehow? It would be great if this thing could be solved as it seems to be recurring quite often in the forums/on github.



  • @zubozrout well, that's what I think, can't be corupt is is working fine on Android. I tried to switch channels, full wipe, full Official Nexus firmware, wipe, install UT by Ubports and wifi issue appear.
    Btw, I used this phone long time ago as dual-boot with Android, when ta.semnice channel was available and was testing UT back then, yep, wifi worked well. So go figure.



  • @Stefano I had Nexus 7 2013 deb and tasemnice was the only server that provided fully working Nexus 7 deb images. I've had Ubuntu Touch installed there both in dualboot mode as well as the only system present over the years and never experienced any WiFi issues. When tasemnice stopped working, I also tried UBports image from Nexus 7 flo on the device and it was also working fine in this perspective. So I've never seen this issue myself.

    From what you say though it could mean the build was done differently when tasemnice was still active. But maybe you would have experienced the same issue with official Canonical images back then.



  • @ubuntoutou @Stefano @zubozrout I'm the one who first complained about the "Wi-fi" issue in the thread located HERE. I'm glad that finally someone else is raising the problem...I don't feel myself alone anymore in this crusade :). Now, I read with deep interest what you all wrote above and I'd like to proactively contribute to the discussion with my findings related to the Meizu Pro5. Similarly to @ubuntoutou, my device is a 64 GB/4 GB RAM, which was dispatched to me with installed chinese stock FlymeOS and, in order to make this device eligible to be flashed with UT, I needed first to follow the particular procedure to convert it from chinese to international device. Here my findings:

    • What described by @ubuntoutou is exactly the same issue I have every time I re-boot the phone;

    • I'm not convinced it could be a problem due to neither a faulty EFS partition nor to NVRAM as suggested by an other Forum user, because, as mentioned by @Stefano, when I flash again FlymeOS, as I already did many times in order to find the culprit, the wi-fi credentials are correctly stored and pushed at every reboot. When I flash back UT, it just doesn't work anymore.

    • I didn't notice before that the wi-fi address changes at every reboot. I can confirm this behavior, thanks to @UniSuperBox.

    • The only workaround I found to overcome the problem is related to the Anbox installation: when I first installed Anbox, surprisingly the issue was resolved (please read the relevant Github issue). I dug into the Anbox files to find out if I could isolate the part of code responsible for that and to maybe write a script useful at the scope, but, since I'm not a developer, I didn't accomplish completely the task. What I understood is that Anbox setup files create a bridge to the network and this bridge somehow resolves the issue. Since then, I gave up with Anbox because it caused to me other undesirable side effects and never tried to install it again, not even after it was made a sensible progress for the installation procedure and images (I'm talking about this thread by Marius).

    What I believe is that the solution is closer than we think but we definitely need someone who can point us where to look at and who can suggest the path forward. Needless to say, I'm keen to spend some additional time at it in order to resolve that issue.

    Thank you all very much.

    Matteo



  • @matteo Probably only @mariogrip can help here as he also have Pro 5 ( don't know if also have the issue with wifi ) , but like previously he fixed the loss of mobile network on Pro5, he might have more to say to this issue on Pro5.



  • Just to emphasize that the issue is not only the fact that the Pro 5 came with Android, I have a 64GB storage, 4GB RAM international version FlymeOS Pro 5 that I got off of Amazon Italy. It was the regular pain to Flash to UTouch.
    One thing that might be different to how you guys installed UT on your devices is that to get my Pro 5 on 16.04 initially I used the link @Stefano provided in this post. But I don't know if that has any relevance at all ...

    EDIT: I forgot to mention that I do not experience this issue. WIFI passwords are retained on my device.



  • @Stefano I don't think Marius is the only one to have the skills to help us in this. Also Dalton does and even all the other UBports developers. Whoever can point us to the right direction is very welcome. Since this seems not only affecting the Pro5 but also other very well known devices, as the Nexus 5, maybe the interest at this topic will raise.



  • @arubislander I also exploited a TWRP file Stefano pointed to me to install a previous version of UT to boot with, in order to be able to update to the latest image of UT. I don't think the problem could be caused by this let's say "short-cut" to by-pass the UBports installer, because after that I performed several times a brand new UT OS installation, in this case employing the official UBports installer and the wi-fi issue was always there.
    When you say Android which OS are you talking about? I'm asking since I believe the Pro5 only comes with stock FlymeOS installed, which is an Android OS.



  • @matteo said in WiFi password loss after each and every reboot on MEIZU Pro 5:

    When you say Android which OS are you talking about?

    I edited my post to clarify the reason for it. When I say Android I mean FlymeOS



  • @arubislander now your post is more clear, thank you. Anyhow, you have the international version. I believe the problem resides in the combination chinese version + 64 GB sd card, since, if I'm not wrong, @Stefano has got the chinese version, but with the 32 GB sd card.



  • @matteo Could it then be that something important gets overwritten when converting the Chinese version to an International version before flashing to UTouch?



  • @arubislander I don't think so, I just followed the procedure. Yes, I had to struggle a bit since the beginning when I needed to gain root access but then all went smooth. As said, anytime I flash back FlymeOS, the wi-fi connection starts again to work as expected.



  • @Stefano You said you had 3 different Pro 5. Did anyone of them had 4GB of RAM?



  • @matteo Chinese, but LTE version, not TD-LTE ( the latter one might have different wifi chip revision...)


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