[Q] [DISCUSSION] Grey 3g signal bars - Nexus 4 Q&A, Help & Troubleshooting

Hi to all...i know there are a lot of post like the following...but give me a shot (and sorry for the italianish english ):
every day 6-7 times when i light my monitor i see the signals bars as grey for a little (not over WIFI but 3g...at home over wifi same issue)...if i open gtalk i see my contact offline for a while.
very...very...VERY annoing :-\
Any help or similar issue on your device?
btw thers's not a codfire rom issue...but every rom i tried give me this problem.
Allready changed my sim...a nano sim with adapter (iphone 5 ****!!!) but no news!!
thanks and bye

I have the same issue. I believe this phone reports signal better then it truly is. At my house in bedroom with my galaxy nexus it would show 1 bar often. With nexus 4 it shows 3 but it is gray which means its not able to contact Google servers I believe. If I make a call its bad quality as well which to me shows its a bad signal but phone reports a bit optimistically

I had this problem on my nexus s. I still get out from time to time on the N4. I think it might of been two different things.
1. A standby mode of the version of android you are running.
2. Maybe an APN setting that is causing you to jump signals.
Disclaimer: I have no idea what I'm talking about.
Sent from my Nexus 4

yes maybe one or both
Any solution from the xda super user???

The grey bars simply mean you don't have 'proper' connection to Google servers. So things like Talk won't work. You night need to invest in a proxy app, like proxydroid
Sent from my Nexus 4 using xda app-developers app

309041291a said:
The grey bars simply mean you don't have 'proper' connection to Google servers. So things like Talk won't work. You night need to invest in a proxy app, like proxydroid
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
more info please?
anyway it0s true your position but i see some delay in the whatsapp notifications! just like gmail, gtalk...ecc ecc
i can't accept that a nexus4 recive a gmail mail later than an iphone 5...

problem SOLVED:
http://forum.xda-developers.com/showthread.php?p=36959344
works like a charm
thanks to andQlimax
bye

Related

[Q] Help/Advice/Comments about tethering issue

Hey guys, ive been tethering for awhile now, and had no problems, just really noticed this after my second month of service.
But, when tethering, HTML web browsing is pretty slow, and my Network Meter widget on my computer says im loading webpages at only 25 -30 KB/s but when i download a torrent/file or anything else (even streaming youtube) my dl speeds go up to 130-208 kB/s. So i thought it was IE9 but then when connected to an actual wifi access point, i experience so issues. Also, i downloaded Google Chrome and the same thing happens. Secondly, when im skyping or oovooing, it will randomly disconnect and hang me up, but yet the icon on my phone says that im still connected to data and everything is fine.
Question is this: Do you think the issue resides in my laptop, phone, WiFi tether app, or T-Mobile network?
I must add both the speedtest app and website (ran from computer) yeild the same speeds. Im completly stumped as to why its like this, im putting my money on the tethering app, but at times when i get kicked off skype and it says i have no internet connection, i try loading a webpage on my phone and it takes a bit longer. (Its really hard to say) but i really need ideas as to where i can start diagnosing and eliminating things.
AS USUAL THANKS GUYS
Are you on Magldr? If so, can you test it with cLK? I'm tethering wired and wireless with cLK and it had been pretty fast- the only time I see a lag in losing any page is if the site is a known, slow one (like the Indian Railways reservations site!)...
Swyped from my HTC HD2 using XDA App
ph03n!x said:
Are you on Magldr? If so, can you test it with cLK? I'm tethering wired and wireless with cLK and it had been pretty fast- the only time I see a lag in losing any page is if the site is a known, slow one (like the Indian Railways reservations site!)...
Swyped from my HTC HD2 using XDA App
Click to expand...
Click to collapse
Im on CLk, i dont like MAGLDR because i have the red key digitizer error. Where the touch screen becomes unresponsive when you use the end key. I might tear it apart and try to fix it someday. But a thought just came across, could T-Mobile somehow know im tethering and throttle me then?
Ah! You didn't mention TMo (am on XDA app, can't see it even of you have added it to your profile!)
It's very much a possibility- other TMo users, can you check this one out?
And how do you tether- wifi or wired? Built-in or an app? I use built-in for wireless and the wired tether app. The app shows the speeds in realtime, try it if you already haven't...
Swyped from my HTC HD2 using XDA App
ph03n!x said:
Ah! You didn't mention TMo (am on XDA app, can't see it even of you have added it to your profile!)
It's very much a possibility- other TMo users, can you check this one out?
And how do you tether- wifi or wired? Built-in or an app? I use built-in for wireless and the wired tether app. The app shows the speeds in realtime, try it if you already haven't...
Swyped from my HTC HD2 using XDA App
Click to expand...
Click to collapse
Haha sorry man! Wasnt sure if it mattered. But i have a feeling its my phone, as something strange happened just a few minutes ago, i was tethering, and i lost connection, so i enabled Airplane mode, then disabled it, and it said 3 bars of service no matter where i was.. it was like the radio got stuck/froze or something. Im gonna flash another radio just to check it out. Also, i use the WiFi tether for root users app which actualy uses built in wifi tethering. But i cant really see the speeds as my phone only gets 3g on my window sill xD and i use VNC viewer to control my phone from my computer. And the tether app uses the wifi port to monitor speeds, so it goes way high when im controlling my phone with VNC from my computer so its hard to say. Im more convinced its the phone :/ but just dont know what.
I think ive narrowed it down, after changing ROM, RADIO, kernel, location, only one thing made a difference, and that was location. I think the connection is unstable because there are no bars showing, just shows the H and that its connected, so i think its just that my signal is horrible, wont know till i get my SGS2, if i get it. :/ my HD2 sucks with signal, can a bad SIM cause this?
elesbb said:
I think ive narrowed it down, after changing ROM, RADIO, kernel, location, only one thing made a difference, and that was location. I think the connection is unstable because there are no bars showing, just shows the H and that its connected, so i think its just that my signal is horrible, wont know till i get my SGS2, if i get it. :/ my HD2 sucks with signal, can a bad SIM cause this?
Click to expand...
Click to collapse
Have you ever dropped your HD2, even if it was not a major fall?
Swyped from my HTC HD2 using XDA App
ph03n!x said:
Have you ever dropped your HD2, even if it was not a major fall?
Swyped from my HTC HD2 using XDA App
Click to expand...
Click to collapse
I have soldered the two tabs to the atenna using 24 gauge wire, i sure as heck hope that didnt come apart xP
elesbb said:
I have soldered the two tabs to the atenna using 24 gauge wire, i sure as heck hope that didnt come apart xP
Click to expand...
Click to collapse
Couldn't help but smile at that one
ph03n!x said:
Couldn't help but smile at that one
Click to expand...
Click to collapse
bahaha i have to do it to the wifi antenna as well. but the wires are still connected, i dont understand what could be causing my horrible service, unless the HD2 is that bad?? i plan on buying an SGH - T989 but i dont know yet....
Are you sure your place has a good signal, and its just the HD2 that is not picking up? Try with another phone. I used to have black-spots in my home a long while back, and used some app for Symbian for my E72 to check the signal strength at various places within the house as well as the cellular towers that is available for me - maybe something like that is available for Android (should be available for sure, is Symbian has it Android will have a million alternative!).
ph03n!x said:
Are you sure your place has a good signal, and its just the HD2 that is not picking up? Try with another phone. I used to have black-spots in my home a long while back, and used some app for Symbian for my E72 to check the signal strength at various places within the house as well as the cellular towers that is available for me - maybe something like that is available for Android (should be available for sure, is Symbian has it Android will have a million alternative!).
Click to expand...
Click to collapse
Well i tried with my Sprint Touch Pro 2, and it got really good edge signal (doesnt support 3g on tmo) but when id put my hands around it it would loose service, but in general, it was much better then the HD2. and actually, we went to see a circus, and inside the stadium, HD2 had no service, but Touch Pro 2 had full bars... so im guessing its the HD2. :/

[Q] any idea on what could be causing my WIFI to give the wrong location?

So when connected to WIFI my location gets messed up. The GPS works fine but the WIFI keeps putting my in Tokyo; thousands of miles away. It does this for all apps so maps will hop over to Tokyo and all weather apps and Google now all display tokyo stuff. No idea what is happening. I am running Paranoid Android. Could just be a glitch with the ROM.
Link200 said:
So when connected to WIFI my location gets messed up. The GPS works fine but the WIFI keeps putting my in Tokyo; thousands of miles away. It does this for all apps so maps will hop over to Tokyo and all weather apps and Google now all display tokyo stuff. No idea what is happening. I am running Paranoid Android. Could just be a glitch with the ROM.
Click to expand...
Click to collapse
Maybe they just have really strong wifi routers in Japan?
Now my location keeps jumping from my actual location and japan randomly. Kind of annoying.
Sent from my Nexus 7 using Tapatalk 2
slack04 said:
Maybe they just have really strong wifi routers in Japan?
Click to expand...
Click to collapse
heh
Hmm, I might try wiping caches, and restarting the router. Also maybe the router itself has some sort of location setting that may be set to Tokyo, not sure though
u need to open back case and bend the metal to get contact with case..
Has it always shown Tokyo?
Sent from my Nexus 7 using Tapatalk 2
jamerican413 said:
Has it always shown Tokyo?
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
Not till after I flashed paranoid android onto it. I'm in a different country now an we will see if it keep doing a it. Could just be a weird router glitch.
Sent from my Nexus 7 using Tapatalk 2
What is paranoid android? The song?
Sent from my Nexus 7 using Tapatalk 2
http://whatismyipaddress.com/ip-lookup, is also wrong for me
http://whatismyipaddress.com/update-location ,this adress might update it for you if google use the same databases
I have this issue as well with my Nexus 7 on CM10 and my HTC One XL on CM10. It doesn't happen on any other phone in the house only my two devices running CM10. I just can't figure out what is wrong with this. It keeps showing Lynwood, WA and I read another post that it has shown same location for two other users on a Galaxy Nexus.
I'm not so sure it's the router or ISP anymore. I have checked my ISP location online and it is correct, in fact even when I go to a website to check it on the Nexus it's correcty while my apps show Lynwood. Also, it only occurs on my CM10 devices and not my wifes ICS HTC Vivid or the Windows 7.5 phone in the house.
If I go to location settings on my devices and uncheck then recheck Google Location services then it finds correct location for awhile before going back to Lynwood, WA

[LOOKING FOR A FIX] DATA drops

Hi guys. I've looked around and it seems that data drops are fairly common as of lately. I would like to find out what exactly the problem is.
Here's my situation. Data drops first occurred about a week ago, I was running RBJ and Harsh kernel with hsic fix in. Mainly it happens when exiting wifi range. Went back to nandroid with RBJ/Bricked and it was fine. Tried harsh again issue reappeared. Tried flashing pre hsic kernels and problem persisted. Full wipe, dirty flashes, different kernels etc. Problem is still there intermittently. Now I'm running stock everything and it seems ok for now, but I did experience it once. I guess more testing is needed. I'd think it could be carrier issues, especially as Orange UK confirmed they are having problems at (that would include T-Mobile) but my wife is on the same carrier and doesn't seem to have this problem.
So what you say? What rom/kernel combo you had issue on and on which one you didn't? Can anyone see a pattern?
Problem first appeared:
RBJ
HARSH
Orange UK
West London
As suggested per _ICE_
Post these please.
Hardware: rev_x (10 or 11) <-- go to boot loader to check
ROM:
Kernel:
Network:
Location: City, Country
Description: One of the below or other
1. There is 3g or H sign above signal bar but the tiny arrow pointing up is constantly showing and you can't get access to internet ?
2. There is no 3g or H sign above signal bar but you have blue signal bars ?
3. No 3g or H, grey signal bars and all of the sudden signal bars dias appear and reappear
What do you mean by no data?
Do you mean
1. There is 3g or H sign above signal bar but the tiny arrow pointing up is constantly showing and you can't get access to internet ?
2. There is no 3g or H sign above signal bar but you have blue signal bars ?
3. No 3g or H, grey signal bars and all of the sudden signal bars dias appear and reappear ?
Most of the times I get issue 1 but simple air plane mode solves the problem
Sent from my Nexus 4 using xda premium
MattSkeet said:
What do you mean by no data?
Do you mean
1. There is 3g or H sign above signal bar but the tiny arrow pointing up is constantly showing and you can't get access to internet ?
2. There is no 3g or H sign above signal bar but you have blue signal bars ?
3. No 3g or H, grey signal bars and all of the sudden signal bars dias appear and reappear ?
Most of the times I get issue 1 but simple air plane mode solves the problem
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
no1 and greyed out icon (no connection to google servers which atomatically mean no connection). The rest exactly as you described in that line.
Simply everyone put the same commits in their kernels and therefore caused them all to fail. Those HSIC fix broke other stuff too which is why everyone was reporting the samething. They've been reverted in CM and Franco and other kernels.
shotta35 said:
Simply everyone put the same commits in their kernels and therefore caused them all to fail. Those HSIC fix broke other stuff too which is why everyone was reporting the samething. They've been reverted in CM and Franco and other kernels.
Click to expand...
Click to collapse
I'd agree that it was the case if it didn't keep happening after going back to complete stock via flashing images.
I wonder if something happened to sim along the way?
undercover said:
I'd agree that it was the case if it didn't keep happening after going back to complete stock via flashing images.
I wonder if something happened to sim along the way?
Click to expand...
Click to collapse
I doubt it is a sim issue. I get the same thing when I am in different areas of my house. Living room is great but the master bedroom and media room give me data drops. Have you tested to see if maybe this is the same thing happening to you? Certain areas causing it?
My phone will have full bars and show the H but out of nowhere I see the data drop, buts its only in certain areas. It has never happened in the living room where I spend most of my time. Oh and I am not on WiFi because I disconnected Time Warners crappy service and am waiting for Verizon to come set up if anyone is wondering why I was using data instead of Wifi .
Sent from my Nexus 4 using xda premium
Monk4Life said:
I doubt it is a sim issue. I get the same thing when I am in different areas of my house. Living room is great but the master bedroom and media room give me data drops. Have you tested to see if maybe this is the same thing happening to you? Certain areas causing it?
My phone will have full bars and show the H but out of nowhere I see the data drop, buts its only in certain areas. It has never happened in the living room where I spend most of my time. Oh and I am not on WiFi because I disconnected Time Warners crappy service and am waiting for Verizon to come set up if anyone is wondering why I was using data instead of Wifi .
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Are you on stock?
And areas I'm affected in are a lot larger. I'm talking 25miles here.
Sent from my Nexus 4 using Tapatalk 2
Same issue here, it's driving me nuts.
The problem is, I have full service and with a data connection with a H.
Whenever I use an app or anything that would use the data connection, it wouldn't work. It just won't work. It does this, sometimes and sometimes in certain areas.
Say I have full service with a strong data connection, I'll use instagram and refresh, the arrows for data connection won't be there and nothing will show.
It does this constantly. I'm running the stock rom with Franco's r23 kernel. It's been doing this with the stock kernel as well. Using T-Mobile in NYC
It's quite annoying, and I really don't want to wipe and or flash another rom as it happens once in a while.
Sent from my Nexus 4 using Tapatalk 2
Well for me it's like 90% of the time.
Edit. Now this is interesting... http://code.google.com/p/android/issues/detail?id=40514
ok, something to test guys.
*#*#4636#*#*
Choose WDCMA only.
Report
Edit. No help
Sent from my Nexus 4 using Tapatalk 2
Its a network thing I believe plus some kind of android issue . I had data drops on galaxy nexus , most of the times its the way once described it in 1 but occasionally the way in 2 or 3. Baaa on giffgaff network I had data but when screen was off I had gray bars.
Sent from my Nexus 4 using xda premium
MattSkeet said:
Its a network thing I believe plus some kind of android issue . I had data drops on galaxy nexus , most of the times its the way once described it in 1 but occasionally the way in 2 or 3. Baaa on giffgaff network I had data but when screen was off I had gray bars.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Read the link above. Something doesn't play well together. From the logs it looks like problem lies in loading apn.
Sent from my Nexus 4 using Tapatalk 2
I get this too. I thought it was only me.
Sent from my own AOKP Grouper build using Tapatalk.
undercover said:
Read the link above. Something doesn't play well together. From the logs it looks like problem lies in loading apn.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
I have no other provider sim with data to test it. Will test wife's Orange sim in a day or two, just to eliminate sim card as a reason.
Sent from my Nexus 4 using Tapatalk 2
Testing time
*#*#4636#*#*
Set to LTE/GSM/CDMA AUTO ( PRL) seems to make data work normal. Still testing though.
Give it a go.
Sent from my Nexus 4 using Tapatalk 2
I only noticed the data drop issue recently, but that might be because I'm on wifi the vast majority of the time. Undercover - I'm experiencing basically the same issue as you are, however my data signal seems to reconnect itself after about 15-20 seconds.
Running stock rooted ROM, motley kernel here, UVed quite a bit, though I don't know if that would cause any problems. Will try changing some APN settings tomorrow and see what happens
When having been connected to wifi overnight and leaving the wifi area, the phone does not switch over to mobile data. The signal bars stay grey.
I have to toggle airplane mode, and then it connects fine. Another fix is to search for provider and reconnect to the network (takes longer obviously)
Is this the same bug?
Sent from my Nexus 4 using Tapatalk 2
i think its an android issue
had this problem on my htc desire and now i have it on my n4
but it occured since 4.0
I seem to have problem with both data and also wifi.
Right now I am looking at my phone connected to wifi and its all grayed out and streaming music stopped. It seems that problem is worse when I have same time connected to bluetooth.
Something is seriously wrong with the new Android.l
No problems here. I'm on T-Mobile if that helps. Cm10.1 and Franco r28.
Sent from my Nexus 4 using Tapatalk 2
I get dropped/inconsistent signals as well but only in certain areas of my house or certain parts of the city I live in. I'll have a few bars of H and then poof no signal. I can almost predict when I'm going to run in to that little problem because my loading times and such will be all around slower. Even though I should have a fast connection according to my signal bars. During times when I'm experiencing fast download speeds my signal never falters. PS I'm completely stock, not unlocked, not rooted.

Terrible wifi connection on note 3!

Has anyone else been experiencing this. I am connected with BT home hub and it's awful. Connection drops literally every few seconds. It was fine with note 2. Any soloutions? I really like the phone but these small glitches are making me angry now. First it was stock browser which I have stopped using in favour of boat, then the biggest selling feature S pen it's sensivity was really bad I fixed it by adjusting the potentiometer and now the wifi signal. I really hope there is a fix for it.
Sent from my SM-N9005 using Tapatalk 4
I also use a BT home hub but have had no problems with Wifi at all. Connects quickly and doesn't miss a beat.
Sent from my SM-N9005 using Tapatalk now Free
No problems for mi.
Had some problems with Fritzbox, especially on the first two days. The connection was not stable, although I had no problems with Note 1, and I have no problems with any other devices. But after the first days this problem with Note 3 was gone by itself. Maybe you should wait...
Sent from my SM-N9005 using xda app-developers app
From Note 2 it might not be so good .. im not completely sure yet but I do keep getting the annoying warning message on my status bar.
Sent from my SM-N9005 using xda app-developers app
i got mine this morning.. i have a bt modem as well and it keeps dropping all the time.. think im gonna give it a day then if it continues ill just take it and get it exchanged..
Works fine on a Netgear router...
Some routers have issues with newer phones. (and some with older ones, as well.). Have you tried updating your router Firmware? Reset your router?
Also, set the connection type to Static, not DHCP.
i was thinking it was the modem but my s4 works fine.. already called EE about a replacement..
mine works fine.. better then my old device!
my Netgear router is located on the first floor at the front of my house (in the office). in the master bedroom ensuite i got like 1 bar on my old device..
now i get full bars..
I live in a newer development area and i am on the boarder of LTE coverage.. on any other device i get 4G in my house.. now i get 2 bars of LTE..
pretty satisfied..
now speaking of software jitters and such.. that's a different story
Mine works great
Sent from my SM-N900T using xda app-developers app
the wifi issue is the only problem i have.. smh.. EE says they out of stock of the note 3.. so i gotta wait til they have to send replacement
WiFi access points don't get better with age. The hardware is upgraded constantly and even firmware updates can't change the hardware. An old WiFi access point of 2-3 years will not work as well as the newer ones do.
WLAN connectivity and speed is real bad on a fritzbox 6360 cable (fritzos v05.50). Sometimes full speed with ~4+ mb/s, a bit later resends and timeouts all the time. foldersync is a pain over wlan. today i needed 1h+ to download my apps from playstore after flashing omega rom. Cabel connection speed 100 mbit! 2.4 ghz or 5 ghz, static ip - no changes hope there will be a modem update for the note3 or a fritzos update that fix it.
Deleted
buell47 said:
After updating firmware today to xxUBMJ1 (Germany) the wireless problem is solved!
and the "automatic switching" can be activated again.
For me, everything works fine again. NO more message for unstable wireless connection!
Click to expand...
Click to collapse
what was the problem you had before the update?
Went into a coffee shop. Where there is free wifi if you buy something. It was me and a friend. My s4 had full signal. And my new note 3 struggling to get connection it kept saying checking quality which is really annoying. Anywhere my s4 gets connection the note 3 checks quality and drops. Im right next to the router at home and this note 3 wants to check quality of the connection. Never had a problem with the s4.
demzzy said:
what was the problem you had before the update?
Click to expand...
Click to collapse
automatic disconnected WiFi connection.
Message "unstable Connection" and switched back to mobile Data (2G,3G...)
but the Problem is not complete solved.....Fritz!Box Routers have the problem further
buell47 said:
automatic disconnected WiFi connection.
Message "unstable Connection" and switched back to mobile Data (2G,3G...)
but the Problem is not complete solved.....Fritz!Box Routers have the problem further
Click to expand...
Click to collapse
Yes I'm getting a less favourable experience with wifi on my N3
Sent from my SM-N9005 using xda app-developers app
buell47 said:
automatic disconnected WiFi connection.
Message "unstable Connection" and switched back to mobile Data (2G,3G...)
but the Problem is not complete solved.....Fritz!Box Routers have the problem further
Click to expand...
Click to collapse
get your device exchanged.. thats what im doing

Mobile Internet connection

Hi, sorry for disturbing, I have a weird connection problem and I am pretty sure it is not the internal antenna... When i use the phone for Internet, mail etc etc.... Everything goes fine it uses a 4G connexion and I almost never have a problem, I do have a problem Sometimes when I am not in a 4G covered area... Than i have to change the network modus to wcdma /gsm automatic because if I leave it on lte /wcdma /gsm the phone is jumping all the time between hspda /h/edge gprs... And this goes fast like that that connection fail... This problem stops when i change modus than I get a stable 3g connection.... A little bit disturbing but Okay..... The biggest problem is that I m always connected with my messenger services like for example WhatsApp.... When i have the phone in my hand no problem at all.... But when he stays on the table or in my pocket it is kinda weird.... Sometimes I don't recieve my messages and than suddenly when I pick up my phone I get like ten messages in once starting from like half hour before.... All this started like three weeks ago, network provider say there are no network problems, I didn't drop my phone or something... Internet connection is just acting very strange lately and this started before I updated to the official 4.4 rom and didn t change after...... I also have to tell that I don’t have problems at all with phone calls or texts messages..... It's just those two mobile Internet issues.... Since i m only good for using the phone and don't know nothing about the technical parts or something... I wanted to ask the question to all of you experts.... And wanted to ask for help and if possible a solution? I want to thank you in advance and hope you guys can help me soon.... Kind regards...
Sent from my GT-I9505 using XDA Premium 4 mobile app
Try different modem perhaps?
Hi thanks for answering.... Tried everything.... Still same two connection problems..... Only thing I didn't do yet was a hard reset.... Could this problem be caused by an application or a bad uninstalled application? Thanks in advance
Sent from my GT-I9505 using XDA Premium 4 mobile app
Steven.svde said:
Hi thanks for answering.... Tried everything.... Still same two connection problems..... Only thing I didn't do yet was a hard reset.... Could this problem be caused by an application or a bad uninstalled application? Thanks in advance
Sent from my GT-I9505 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Hmmmmm, highly unlikely from my point of view, but however there could be some apps locked into 2G or 3G or 4G connection.
Try how clean system doing, if it's same, consider it a hardware problem which there is nothing we can do about it...
samsung s4
i am having network issues
wifi works good
2g works good
3g/4g doesnt work at all no signal if i select these networks
is it a modem issue or kernel issue

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