since I upgraded my S9 from iodéOS 2.15 to iodéOS 4.7/8/9 I am facing ongoing problems with the internet access per WLAN. I am running my S9 in addition to iodéOS also with Magisk and AF Wall+ and I establish a connection to my router (FritzBox 7520) only as needed. So, most of the time the WLAN of my S9 is disabled. Typically, I enable and disable it 3-6 times per day.
The problem that I am facing is, that the internet access per WLAN becomes very slow 90h-150h (4-6 days) after a system start (reboot). So, although the WLAN symbol is quickly shown in the notification bar after enabling WLAN, it is not possible to establish an internet connection in order to check my emails (K9), updates of apps (F-Droid, Aurora Store) or the weather forecast (omWeather).
So far I have run quite a number of tests in order find the root cause:
enabled/disabled (installed/uninstalled) Magisk and AF Wall+ w/o any improvement
enabled/disabled iodè app w/o any improvement
rebooted my router w/o any improvement
checked my router for unsupported WLAN protocols w/o any improvement
checked for strong other WLAN traffic w/o any improvement
operated my S9 both 20m away and 20cm away from the router w/o any improvement
tried to find a correlation between 2.4Ghz and 5Ghz connections w/o any improvement
checked the battery management for disabling apps to safe power w/o any improvement
used an arbitrary MAC address as well as the S9 MAC address for WLAN w/o any improvement
On the other hand I have found out:
Mobile internet access is not affected. It is always fast.
The internet access per WLAN can be immediately improved by restarting (rebooting) my S9.
And, I never had this problem when running iodéOS 2.15.
So, to me this in is a problem that was introduced by the upgrade from iodéOS 2.15 (Android 11) to iodéOS 4.7/8/9 (Android 13). I have searched the internet for reports about similar issues and found a number of complaints all related to Android 13. So, currently I assume that it is probably a problem of Android 13.
If you have any idea, how to fix this problem or find a lasting solution (other than buying a new or refurbished Smartphone and installing iodé 2.15 ) please let me know. Your help is highly appreciated.
I have already ruled out AFWall+ by running a test w/o Magisk and AFWall+ (see my original post). Moreover, when enabled I use AFWall+ not only to control WLAN but also mobile internet access. And the latter was never affected. So, there must be another root cause.
In order to narrow down the root cause of my aforementioned problem, I bought a second refurbished S9 and installed the nightly lineage-20.0-2024-04-14. I found that this nightly suffers from the same problem as iodè4.x. So, the issue is not related to a specific S9 and it is not related to iodè4.x but to lineage-20.0. I was further able to track it down to the DNS. I am running a WLAN router with native IPv6 connection and an IPv4 tunnel. It turned out that 4-5 days after booting the system, IPv6 internet addresses were no longer resolved. As a result e.g. k9 tried 4 different IPv6 addresses until timeout was reached before the corresponding IPv4 address was sucessfully used. This resulted in a time delay of several minutes until email was fetched from the server of my private email provider. Another email provider that I use for business emails with k9 offers only an IPv4 address and allows to fetch emails within seconds even 4-5 days after booting the system. Also other apps are affected, e.g. omWeather. So, this rules out also the apps used on my S9.
In order to work around this problem for the time being I have now backed up my apps data, re-installed the most recent S9 firmware from scratch (including factory reset and wipe), installed iodè2.15 and restored the apps data afterwards. Since then, the aformentioned problem did not recur, which also rules out my router as root cause of the issue.
So, for the time being I will continue to run iodè2.15 and ignore any lineage-20.0 and iodè4 update hoping for lineage-21.0 and iodè5. Some of you may have already noticed that an inoffical lineageOS 21.0 is already available.
Bonjour Tom,
Thanks for the investigations. I suffer too, for months with such similar problems, without solution too.
I linked it to iode 4, and especially with my Synology router WiFi when IPv6 is activated. Then S9+ WiFi disconnects and reconnects every 15s. Playing with DNS settings/private DNS affects this behavior, but no solution found on my side.
Other phones and computers do not suffer such problem.
I had to reactivate my box WiFi to solve this (and with it, no problem with IPv6 neither disconnecting). Why ? Mystery machine.
I can’t desactivate IPv6 for accessing my server (IPv4 CGNAT at home… IPv4 only at the office - a pleasure).
My searches on internet gave some results about a problem linked to Android 13, but nothing sure.
I was hoping for iode 5, but seems not available for the S9+. Sadly this is the only frustrating topic with iodeOS.
Regards,
Pascal
There is no Android 14 for the S9+ and therefore no iode 5 and LOS has just completely stopped supporting the s9 series because there is no longer a maintainer. In the worst case, you will no longer get iode 4 updates.
The phone is now 7 years old, so that’s basically the end of it
The neighbor from the big city of Paris still offers current support for two versions: Android S(12) [official] + Android T(13) [community] e-2.6.3 2024.12.17. The end of support for the Galaxy S9 family is in sight, but not yet here.
Happy New Year,
sorry for being silent for quite a while,
thanks for your feedback
and thanks for the confirmation about the end of support for the Galaxy S9 family.
Actually, this does not change much for me as long as my S9 is still functional. I am still running Iodé 2.15 without any problems.
However, once my S9 will stop to operate, the challenge will be to find a small Smartphone (display < 6"), supporting 5G with a small SAR, an external SD card, that is supported by Iodé (and if possible also by twrp).
I updated to the latest version three weeks ago (iodéOS 4.19) on my S9, so I don’t know if the latest update started my issue but since yesterday I have limited mobile network connectivity. Wifi works fine. There’s a question mark on the connectivity icon on the top-right. But only for mobile connectivity. so a different issue, but it might have also something to do with the approaching end of support
hi
also S9 with 4-20241213.
the exclamation mark only appears for me when I deactivate mobile data and only use WiFi. which is correct in this case.
is it perhaps deactivated for you?
what network type have you set?
what country do you live in?
is your APN correct?
This might actually be a good idea. I never turn mobile data OFF, but now I did, and then turned it back ON, and mobile connectivity is back. Lets see if it stays. Thanks man.
) please let me know. Your help is highly appreciated.