Develop Bugs

[Q] WiFi Router restating itself when initiating large downloads from DHD

Hi,
I noticed a strange problem with my DHD in the last month (apparently appeared after applying the OTA Gingerbread update, but not sure about it).
I am at home connected through WiFi to my router (a Siemens Gigaset) and whenever I initiate a (somehow large) download like a map from Locations or a Rom from ROM Manager or even the browser (both stock and Dolphin HD), after the first seconds (sometimes less than 10, sometimes around 30) the router restarts itself.
What I tried:
- Starting a download from my other Android phone (a Samsung Spica) - everything seemed ok
- Downloading some files with my laptop also through WiFi - everything seemed ok
It seems it is after all some sort of compatibility issue between my DHD and my router. Anyone else encountered similar problems ? Any hint on a possible solution / workaround (other than changing the router, phone etc )

hallo...i have almost the same problems and have now reduced the number of wlan-channels used to 11...i use the CM7-ROM...many greets

I had a similar problem with other devices. In my case it was due to WPA2 encryption. My router's implementation seems to be a bit flaky.
I hope you find a fix.

Fritzman said:
hallo...i have almost the same problems and have now reduced the number of wlan-channels used to 11...i use the CM7-ROM...many greets
Click to expand...
Click to collapse
Thank you for your answer. I am on TB Fusion 1.8.3 and can not see an option to set the channels to 11. Tried in the build.props file but no succes. Also there is no such setting on the router menu.
Can you please give me more details.
Thanks in advance.

fdelosriossanchez said:
I had a similar problem with other devices. In my case it was due to WPA2 encryption. My router's implementation seems to be a bit flaky.
I hope you find a fix.
Click to expand...
Click to collapse
Thank you for your tip.
Tried this (disabled WPA2, switched to no security plus IP filtering) but with no succes as after made the changes I have the same behavior.
Any other suggestions you might have?

[Q] Wrong ARP WiFi annoucements with JB ROMs

I've got a significant problem with my DHD when running any of the latest JB releases I've tested -- the problem appears with the JellyTime, codefireX, pipelinerard's CM and also the AOKP ROM's I've tested, even on a clean install (complete wipe of everything but the radio, install only the ROM; gapps not needed to cause the issue). The problem is however not manifest in IceColdSandwich, so I suspect something is broken in the way JB uses the WiFi network compared to how ICS did it. Maybe that triggers a bug somehow in the radio or misses some important radio settings?
To some/many people, it may not be immediately visible, but if you have this problem and use your phone on a large network, you might get banned/kicked off the network if they use rules similar to what e.g. Princeton recently implemented. You may also experience this as intermittent network problems with some hosts being unavailable from time to time.
Here is what happens:
Whenever the phone sleeps (i.e. the screen is off), it sends out bogus ARP message every 15.1 seconds (give and take 10mS or so). The message typically announces "IP x.y.z.v is at MAC ii:ii:ii:ii:ii:ii:ii" where the MAC address is the one of the phone and the IP addresses seems to come from some predetermined list and/or the routers IP -- or it might be 0.0.0.0.
On my network, when using one of the AP's, it will send out seemingly "real" IP addresses that will clog up the main router, trigger additional traffic to poll the ARP addresses and eventually cause misfunction and loss of connectivity also for other clients on the network -- it will however heal itself after some minutes, when the ARP cache times out, just to reappear again later randomly.
On the other AP it will always announce an IP of 0.0.0.0, which is obviously incorrect -- but doesn't cause any direct malfunction.
From time to time, I've also seen incorrectly formatted ARP packages.
I've debugged this with wireshark and pcap's on my network (as I started to wonder about more frequent network problems after using this phone).
I've also tried running tcpdump on the phone itself, and have inspected the pcap from the locally captured file. That pcap does NOT contain the ARP messages, so somehow somewhere deep down the kernel or in the radio, ARP messages are triggered to be sent out (i.e. below the capture interface).
To see if you have this problem, you need to run wireshark on another device and check for traffic from your phone's MAC address. It is easy to see if you know what to look for. You cannot know if you have this problem unless you check for it -- but you might suffer weird connectivity issues from time to time also on other devices/PC's, depending on the rest of your network components, that are not immediately discernable as related to the phone.
Technically this looks similar to ARP spoofing/flooding, with similar symptoms.
Does anyone have any ideas how to fix this? I think this requires someone with kernel/network knowledge, and it is likely related to how parts of the legacy parts (binaries) are being used.
I'm initialy trying to figuring out what runs every 15 seconds on the phone, and would then like to start tracing/bisect ICS vs JB code here.
Would also be nice if someone else could confirm this -- even though the specific symptoms apparently depend on certain WiFi related parameters.
Any ideas?
For reference, I'm using the latest radio 12.69.60.29_26.17.14.11_M. But as ICS does not have this problem, it might not be related to the radio version directly.

how do i help fix this [wifi with many same SSIDs]

Ok let me start my wifi at any normal sports works fine, however at work i can not connect.
Before we start the usual "reset the router" or "its your networks admin, he is MAC address filtering", no they are not, I asked and my galaxy nexus/nexus 4/nexus 7 never had not a single problem with connecting. Or anyone with acurrent android smartphone, or iphone, or the odd guy out with a windows phone
While i am noticing that its not android version issue, as 4.3 stock color OS has this issue as do every 4.4.+ rom has this too
I believe the problem is our phone will get confused with which access point to connect to as it sees many (and we only see one), is this a kernel issue as i am guessing all the devs are pulling all the good bits from oppo for hardware support
Question is how to I help fix it

BrianDigital said:
Ok let me start my wifi at any normal sports works fine, however at work i can not connect.
Before we start the usual "reset the router" or "its your networks admin, he is MAC address filtering", no they are not, I asked and my galaxy nexus/nexus 4/nexus 7 never had not a single problem with connecting. Or anyone with acurrent android smartphone, or iphone, or the odd guy out with a windows phone
While i am noticing that its not android version issue, as 4.3 stock color OS has this issue as do every 4.4.+ rom has this too
I believe the problem is our phone will get confused with which access point to connect to as it sees many (and we only see one), is this a kernel issue as i am guessing all the devs are pulling all the good bits from oppo for hardware support
Question is how to I help fix it
Click to expand...
Click to collapse
Unfortunately, while it may not be an issue on other devices, there IS something weird about your network and I don't know what.
I can't reproduce the multiple SSID problem when I open up wifi settings to scan for networks at work - I see one entry per SSID even though I KNOW there are multiple APs.
Our kernel drivers come from CAF - https://www.codeaurora.org/cgit/qui...b496862222c0a89d&id=LNX.LA.3.2.5-00210-8x74.0 (that tag matches the CAF tag Oppo based their platform bringup on.)

Entropy512 said:
Unfortunately, while it may not be an issue on other devices, there IS something weird about your network and I don't know what.
I can't reproduce the multiple SSID problem when I open up wifi settings to scan for networks at work - I see one entry per SSID even though I KNOW there are multiple APs.
Our kernel drivers come from CAF - https://www.codeaurora.org/cgit/qui...b496862222c0a89d&id=LNX.LA.3.2.5-00210-8x74.0 (that tag matches the CAF tag Oppo based their platform bringup on.)
Click to expand...
Click to collapse
this is troubling then, if your connecting fine to a similar network then I might be up ****s creek with connecting. Thanks for the info

Netflix and other apps not working over home WIFI?

Hello Ladies and Gents...
I have both a Pixel 3 and Pixel 3 XL. Both phones are experiencing the same problem. At my home wifi, I'm not able to login to login to my work office 365 emails, and login netflix. Both apps work just fine over LTE and using work Wifi. I have other android and Apple devices that work just fine at home doing these simple tasks. I have a netgear R9000 router and Netgear Orbi mesh network. I've tried both 2.4 and 5Ghz bans and even tried different encryptions (WPA and WPA2). I've also tried creating separate wifi networks from each wifi and mesh devices. One of the phones i tried doing a factory reset and that didnt work. It still has the same issues. I'm at a loss at this point as it seems ive tried everything short of doing a hard reset on the phones.
Any advice would be greatly appreciated.

Hey guys, just wanted to post an update.
I was able to figure out a fix to this problem affecting me. Hopefully this will help others with similar problem. Rather then posting on multiple threads i will post my findings here as it looks to be affecting multiple users.
Here are some of the post i've found concerning this issue.
https://forum.xda-developers.com/pixel-3-xl/help/strange-issue-using-wifi-pixel-3-apps-t3857059
https://www.reddit.com/r/GooglePixe...yone_else_having_issues_loading_certain_apps/
From my extensive troubleshooting I've done, this wifi\app connectivity issues lead me to find the culprit as being the modified MTU settings on my router. I have yet to find the reasoning as to why the Pixel 3\XL or Android Pie in general are more sensitive to packet fragmentation. My other PCs, android (8) and Apple devices had absolutely no issues with in my mesh network. Keep in mind that MTU settings can be Internet provider specific. You will need to find the optimal setting for your home network. Mine on Spectrum Cable has a default 1500. I've made modifications for gaming to assist in bufferbloating which in turn caused issues with my Pixel 3 phones. Once i reverted back to the default MTU setting, all 3rd party apps began working again. No more Netflix login issues, or office 365 Webmail issues, or not being able to access encrypted sites. All working again. We are back loving our Pixel 3's again.
I hope this helps you all. Good luck.!

Thank you so so much for this !!!

Mtu at 1500 solved the issue on my Mesh system

WiFi connected without internet

Dear All,
My note 10+ loosing internet randomly. While checking WiFi showing the message "WiFi connected without internet". after switching on and off it reconnects but lose connection after sometime. My other android phones are connected to the same WiFi but have no issue.
Please help me solve the issue.
Thank you
Arun

i have noticed its happening during whatsapp call duo calls

arunjyothisp said:
Dear All,
My note 10+ loosing internet randomly. While checking WiFi showing the message "WiFi connected without internet". after switching on and off it reconnects but lose connection after sometime. My other android phones are connected to the same WiFi but have no issue.
Please help me solve the issue.
Thank you
Arun
Click to expand...
Click to collapse
A similar thread was made on the subject - link here https://forum.xda-developers.com/galaxy-note-10+/help/android-10-5g-wifi-dropping-t4037661
For practical intents and purposes it's almost like when the issue happens the phone is not able to resolve a DNS query. I base this on 2 hypothesis - first being that the phone is still connected to the wifi access point and can still access LAN resources. The second being that the phone must either poll the internet (i.e ping a specific address) on a regular basis. If the poll was unsuccessful it flags the connection as "WiFi connected but no internet".
The things you can try are:
update the firmware on your phone (if not already)
factory data reset (read note 1 below)
reset network settings
try a different wireless router (read note 2 and 3 below)
disable private dns (read note 4 below)
If you use tasker create a routine to automate a temporary solution (read note 5)
Notes
The issue maybe a corrupted setting within the phone. I have had similar issues before (not with just this phone) and a factory data reset helped. One thing to take note of is that after the phone had completed it's factory data reset I did not attempt to restore a backup. This is important to keep in mind because any issues that were present (due to corrupted settings) would exist also in the pre-factory data reset backup you made.
With my previous router I had this issue but had since replaced it with a Wifi 6 capable router. After getting the new router I have not had any further issues what so ever. Also make sure your wireless router is up to date on it's firmware. It maybe possible that the wireless router you have is old enough (from when it was released, not from when you bought it) that a replacement might be the only way to resolve the issue.
To help rule out a wireless router issue try using a different one. You can borrow a friend's internet connection for a while, or a public cafe or what ever. Point is you are trying to see if the issue happens again when you are using a totally different wireless access point (by totally different I mean hardware/model and not just renaming the SSID).
I had the issue happen when using private DNS. For what ever reason the issue was with the DNS provider I had choosen. Turning the Private DNS setting off helped resolve the issue. After turning the setting off it may take a bit before the phone recognizes it was turned off, but you can hasten this process by toggling WiFi off and back on.
The Tasker option is one I did and it worked quite well. You may need to adjust the routine to suit your particular needs but it's basically what is at this link here. Best part of this option is that you can have it only activate when your connected to the problematic wifi access point and every X number of minutes (helps ensure that you use it only when needed). The routine (when setup correctly) should run every 10 minutes in where it attempts to access a website and assigns the results to a variable. The variable is then checked to see if it matches a specific result (in this case an error code), and if it does match it will toggle WiFi off and back on (after a brief pause/wait period between toggle off and toggle on) automatically. Granted it sounds like a lot of work, but it's really not that complex. Also I consider this is a temporary solution because you may find that on later firmware updates applied to the phone (or you may end up getting a new wireless router) the issue will have been resolved.

"WiFi connected without internet"
I was having the same issue until I uninstalled the app "WiFi Analyzer"

mike.aguailar said:
I was having the same issue until I uninstalled the app "WiFi Analyzer"
Click to expand...
Click to collapse
Interesting! Which one? The Play Store lists several apps by that name.

WiFi Analyzer
Gary02468 said:
Interesting! Which one? The Play Store lists several apps by that name.[/QUOTE
WiFi Analyzer by Zoltan Pallagi
Click to expand...
Click to collapse