yashsingh1/xdaforums huggingface dataset:
[Acer Iconia A500] Achristocat:
That did it! Thanks...

Deleting the lease file cured my WiFi woes too.

Boy do I love the XDA forums... :)
[Acer Iconia A500] 1701G:
Ran into this problem as well after the 3.1 update. Before 3.1, all was well. Connected via wifi at home and at work. After 3.1 home was okay, went to work, was okay for a few hours, then the Acer disconnected.

Multiple wireless networks to choose from at work. Connected to them all previously. None would work. They would show strong signal but the signal would drop to -1 during the "obtaining IP address" loop.

Checking this forum and others saw that a few people were having the same issue. Unfortunately, although my Droid is rooted, my Acer is not (we're testing them at work) so the file delete fix wasn't an option. Gave up and called support and got bounced up a few levels.

Long story short, it sounds like they know it's a problem. Factory reset does appear to be the only fix for non-rooted devices. The reset will keep you at 3.1 (someone asked earlier). Support said to look out for a fix soon. (support guy seemed knowledgeable and sincere so let's hope he spoke the truth and just wasn't blowing smoke)

Keep in mind that resetting is

not

a fix. The problem will come back. So, if you reset, don't put your heart and soul into tweaking everything back to the way you like it as you'll likely lose it all again. If you don't roam, go static until a fix arrives. If you roam ... good luck. I've been home all day and so far no trouble but will be roaming soon. I suspect that will not go well.
[Acer Iconia A500] arifi1:
I have a rooted iconia but i still cant find the file to delete.I hooked the tablet to my pc and opend the folder where it should be and it isn't there.
[Acer Iconia A500] rpdillon:
The best way to approach this IMHO is to use IconiaRoot 1.3 and just use ConnectBot to get a local terminal. From there, just:

$ su
# cd /data/misc/dhcp
# rm dhcpcd-wlan0.lease

I actually wrote a script to do this that I can run in connectbot. I don't know what Acer's plan is to fix this, but they're gonna have a serious problem pushing OTA updates to a bunch of folks who don't know the difference between DHCP and static addressing, much less how to set it up.
[Acer Iconia A500] 1701G:
Agreed. I think they'll be telling a lot of people to reset first and then grab the update. Explaining how to do a rest (and listening to the outrage) will still be quicker and easier than trying to explain static addressing, determine the user's network range, and walking them through the configuration.

Problems like this is why they roll out updates slowly instead of blasting it to everyone. Looks like this one wasn't caught and pulled back quickly enough or the percentage of users experiencing it is pretty small.
[Acer Iconia A500] rvholland:
I also ran into this today as well at work. Worked OK before 3.1 but won't connect on secured network. I was able to connect to the open network for visitors that is on the same set of access points.

Connected back at home just as it should now. at least I don't need this at work for now.
[Acer Iconia A500] nithos1:
The factory reset did not work for me. Still unable to get the IP unless I assign it a static one.
[Acer Iconia A500] BatPenguin:
Alright, I managed to fix this without resetting...I downloaded the 1.3 root and Connectbot apks, first from the forums, second from Google Code, connected the tab to my computer and moved the apks over, then rooted and deleted the file with Connectbot. Works now. The most difficult part was actually connecting the tab to my computer, as I run Linux and it wouldn't detect the tab. Had to install a bunch of stuff on my laptop to get it going. But anyway: if you are unrooted, download the apks, move them over with the usb cable and install. Works for me.

Thanks everybody for the help here!
[Acer Iconia A500] ando.rulez:
Work very well. Eliminate my frustration !!! Thanks.
[Acer Iconia A500] me2010kurri:
Thanx mate, u guys saved me again, didn't want to root again after update but was forced to by this wifi issue.
[Acer Iconia A500] baldbear:
I left my tablet on overnight (unplugged) and had the exact same problem. 3.1 does break the wifi. (fixed with the steps posted).
[Acer Iconia A500] will3b:
hi all,

I noticed a slightly different wifi problem on my iconia after 3.1 OTA update : wifi connection works (at least at home, didn't try to connect to other APs atm) but dies if I switch the screen off for a few minutes, even if I set it to stay on even when the screen is off : when I switch the tablet back on, the wifi seems ok, at least in the notification area, but the link is definitely down, and I have to switch wifi (or plane mode) off and on again to get back online.

Not sure this problem is related to the other one described in this thread (dhcp lease pb) : maybe a power management issue, as it occurs only when I leave the screen off for several minutes ?

Did anybody notice that as well ?
[Acer Iconia A500] ozymandious:
Simple solution found in this forum.

http://xdaforums.com/showthread.php?t=1158039&page=3

Do a double reset. it worked for me on my non-root OTA 3.1

when doing the 2 resets, please make sure that you let the tablet load with every reset you make.

1. forget the network you are trying to connect to and try to connect, if it doesnt...

2. make the 1st reset, and let your tablet load...

3. check if it connects after it loads if it doesnt...

4. do the 2nd reset. let the tablet load and see if it connects.

in my case, it connects after the 2nd reset. I hope this helps! :-)
[Acer Iconia A500] ozymandious:
Simple solution found in this forum.

http://xdaforums.com/show...1158039&page=3

Do a double reset. it worked for me on my non-root OTA 3.1

when doing the 2 resets, please make sure that you let the tablet load with every reset you make.

1. forget the network you are trying to connect to and try to connect, if it doesnt...

2. make the 1st reset, and let your tablet load...

3. check if it connects after it loads if it doesnt...

4. do the 2nd reset. let the tablet load and see if it connects.

in my case, it connects after the 2nd reset. I hope this helps! :-)
[Acer Iconia A500] gavinhoc:
THANK YOU!

rpdillon: you saved my a good bit of pain. Thank you for the post!
[Acer Iconia A500] jeffro77:
I have the luxury of needing to regularly connect to only 3 routers (home, phone, and work), so I'm currently running static IPs across the board.

However, yes, I'm seeing the issue you describe here; if the tablet is left idle for more than about 30 minutes (sometimes longer, sometimes less), I have to power cycle, reset, or go into airplane mode to get the radio to work again. I absolutely have to go through this routine every morning after leaving it sit over night.
[Acer Iconia A500] 1701G:
Didn't work for me. Tried two resets (with full loads and after forgetting the local networks) with trying wifi each time. Then tried two more resets in a row (waiting for a load to the lock screen each time) but still no joy.

Wifi shows great strength. Upon trying to connect (either to open or secured APs) strength drops to "poor" (-1) and it loops "obtaining IP address". Right now, the tablet only works at home where it's got a static address.
[Acer Iconia A500] will3b:
Glad to know I'm not the only one. I find it weird that very few people report this issue, which is really annoying in my opinion. Well, probably not as annoying as the DHCP problem, which I did not experience, but still, this issue is starting to make me prefer my good old galaxy tab that at least pops my emails even if I leave it iddling...
[Acer Iconia A500] bhageman:
I tried everything else, but this worked for me. Thanks for the help!
[Acer Iconia A500] jm77:
Worked for me. Thank you!
[Acer Iconia A500] rmingee:
I deleted it, and have done a soft reset numerous times, and it will not connect, and has not recreated the lease file (probably because it hasn't connected). I did a factory reset once, and even then I had to do a soft reset during the setup process because it STILL couldn't connect. This is an extremely serious issue - I can't believe any company could possibly have missed something like this. I really don't want to do another soft reset, but it's looking like I may have no choice unless there are any other ideas...

-- robert
[Acer Iconia A500] bpivk:
I have some. :)

Did you try disabling wifi and then re-enabling it? It often will remain stuck unless you disable and then enable it.
[Acer Iconia A500] rmingee:
Yep, tried it, but thanks. I tried forgetting the network, disabling wifi, you name it.

It gets worse. Even a factory wipe through clockwork recovery DID NOT FIX IT. My tablet is now useless in my own home thanks to this bug until either Acer releases an update or a custom ROM comes out with this bug fixed. About the only thing left to try is a factory wipe through the regular menu, which wipes the entire internal storage, but worked last time (but only after a soft reset during setup).

If I were still within the return window, I would just take this thing back - I am now completely soured on Acer.

-- robert
[Acer Iconia A500] rmingee:
Well, so it's working again, and maybe I misunderstood you the first time, because at first I didn't interpret your post to mean resetting twice before re-enabling. Here's what I did:

1) forget home network

2) disable wifi

3) remove lease file (must be rooted)

4) reset, let fully restart

5) reset again

6) enable wifi

7) select network, enter password

8) joy (finally)

So thanks! Even if that wasn't what you meant, it was enough to make me try it, which worked! :)

The only part of this that is really strange is that even a factory reset did not fix it. Thank goodness I had made a full nandroid backup, which I restored after giving up and decided to try that one last thing, so my tablet is back to the state it was in before the second wifi failure started.

Whew!

-- robert
[Acer Iconia A500] zoubidou:
just a question, did you encrypt you iconia to use exchange? because if you did that there is no factory reset at all, as long as you have not flashed an original rom without su and cwm and the do a factory reset in settings.
[Acer Iconia A500] Naex:
Would it be possible to write a simple app that listens for the WIFI_STATE_CHANGED intent and deletes the dhcp leases file? I'm sure someone can write one a little faster than me as I'd have to do a lot of digging around the documentation. Obviously, you'd still need a rooted device for this to work but at least it would work around the problem for now.
[Acer Iconia A500] TVDinner:
I am pretty pissed about this. I have friends with Xoom tablets and galaxy tabs and this is not happening to them. This is a joke.

So I can not connect to the internet to download anything. So I can't get a root program on my Acer Tablet to even try removing the file everyone is talking about because I obviously can't see it currently since no root program yet.

Can some one PLEASE post a step by step list of how to get the needed programs (Please also include a list of suggested root programs that we can use) on you main computer, then move that suggested program to the tablet, install it and make this work.

I am very close to just going with another tablet since NONE of the others are experiencing this.

If one of the great people here can post the requested step by step list above it would be really helpful. I read this entire thread and there are about 15 different things suggested that are still not working for me. All I have left to try is the removing the rooted file but unsure how to get the program to my tablet and make it work.

Thanks all and sorry for the rant. This place is great. Right now my Acer Tablet sucks rotten eggs....lol
[Acer Iconia A500] bonzer2u:
Did you try the punch the tiny reset button rebooting twice method? I read somewhere that this was a formal acer support suggested fix but cant locate the thread....
[Acer Iconia A500] TVDinner:
Of cource I tried that. Worked one time and now it does not.

Also, how many times should anyone be rebooting their tablets before they do damage. Some people are posting in other threads they are rebooting 10 times a day. Can't be good for the $500 tablet.

If someone could just post a simple "how to fix bullet list for dummies" on how to root the unit without wireless connection and then remove the file that would be really wonderful.
[Acer Iconia A500] bonzer2u:
I had a very weak wifi signal with my first a500, acer support suggested I exchange the device which I did and have not had any issue since. They did indicate that there was a known issue with some wifi devices at the hardware level. Perhaps you should run it by them, the call is free.....
[Acer Iconia A500] TVDinner:
7/20/11 record of call to Acer -

I called Acer support at - US – 866.695.2237

I spoke to a tech support who advised me to reset 2 times, to which I laughed at him and explained that had been tried and done about 200 times without working consistently. He admitted openly that they are getting a ton of calls about this problem.

After we reset about 6 times I amazingly connected (still not sure how or why)

Once connected I asked the Acer rep specifically if he could tell me what update number might have a fix included in it. He could not and did not know. The first thing I did was go to Settings, About Tablet, Status to see if there was an update I could download. There was, so I downloaded and installed the update. that put me at Kernel Version 2.6.36.3. The Acer rep had no additional info if this version had a fix or not.

I then asked him if i could speak to someone above him who might know more about the tablets he was supposedly providing support for. He put me on hold and went and spoke to someone.

When he came back (about 2 minutes on hold) this is the official response I received from him, after he spoke to "someone" at his office - was that Acer did not have a patch or fix at this time. I told him that this seemed ridiculous and the Xoom and Galaxy tablets were not having the same issues so why the Acer issues? Again he knew nothing.

Just wanted to post this info and the Acer phone number.
[Acer Iconia A500] bpivk:
Actually there are some posts here (I don't have the will to search for them but they should be here somewhere) that state that the fix is on it's way. Also some custom roms have a wifi fix noted in their changelog but I can't confirm if it's THE FIX :) or if it's something else.
[Acer Iconia A500] Haggis70:
I saw on another forum that there is a patch posted on the Acer support site dated July 19 that seems to be for this problem. It is under the Patch tab and is called "Acer ICONIA TAB A500 'connect Wi-Fi unsuccessfully' patch". You need to select Honeycomb 3.1 in the OS pulldown to see it.

It doesn't show up for me when I select the US support site, but it does for Canada. The instructions included in the zip do mention the US, though.

Direct link:

http://global-download.acer.com/GDF...A TAB&Step3=A500&OS=a07&LC=en&BC=Acer&SC=PA_4

I have not tried it myself (still on 3.0.1).
[Acer Iconia A500] TVDinner:
I downloaded the patch and followed the instructions. When the Android robot comes up it stops and I get the pictures of the robot with a big exclamation point in a triangle in the middle of the robot. i assume this means something needs attention. Not sure if it is installing the patch or not.
[Acer Iconia A500] bonzer2u:
it likely means you have thors recovery image installed? or...?????

get into whatever recovery you have, CWM for example and just flash the zip file
[Acer Iconia A500] bmathison:
Did you read the PDF and ensure you had the proper version for the patch first?

.. on a side note, has anyone tried just changing permissions on the files in

/data/misc/dhcp/

dhcpcd-wlan0.pid or .lease?

I noticed after renaming those 2 files, as I am sure someone already mentioned, that the permissions change for the files. I noticed the .lease file changed back to r--r--r-- and the .pid file from rw-r--r-- to rw-rw-r--
[Acer Iconia A500] Diskun:
After removing all permissions to the .lease file, I could use my WiFi once again. So yes, this works.
[Acer Iconia A500] Jerra:
Cant' find dhcpd-wlan0.lease

I've just started getting the wifi unable to connect on dhcp. I've checked the forum and it says delete the above file in the /data/misc/dhcp directory. I can't find that directory, in fact in /data there are no subdirectories! What am I doing wrong?
[Acer Iconia A500] bpivk:
Not rooted? File manager you're using doesn't show those files? Files are hidden?

There could be a number of reasons but I suggest using root explorer or similar app and check again.
[Acer Iconia A500] ThatGeekGuy:
I'm having the same issue as well. It will connect to 'regular' wifi networks fine, like commercial hotspots, my home router or my Galaxy S when I use it a a mobile hotspot. When I try to connect to our work network, after I input my username and password it just sits at 'connecting' and the signal strength immediately drops from Good to Poor with a -1 throughput.

I used Root Explorer to remove the suggested file, powered down and restarted, same problem. File is still gone, didn't recreate itself on reboot. I have done a 'paper clip' reset on the tablet multiple times with no luck. I guess my only other option is a factory reset through settings and lose all my data/apps. Even with Titanium Backup, it's still a pain.

I like the Iconia overall, but this kind of stuff makes me wish I had kept my gTablet....
[Acer Iconia A500] bpivk:
@ThatGeekGuy: Are the networks that work DHCP enabled or did you set the IP manually? If they are then you don't have this problem. If you had the same problem as we used to had (the latest Acer fix solved it) then you wouldn't be able to connect to any router.
[Acer Iconia A500] rvholland:
Sounds like your work wifi might be using 802.1X authentication and if that's true you might want to read this thread. Just be sure to read the complete thread as there is a suggestion regarding the WiFiFix but that's not the fix for what it looks like may be affecting you. The talk about using WiFi Advanced Configuration Editor is the part the was helpful for me.

http://xdaforums.com/showthread.php?t=1185885

Several users reporting difficulty with 802.1X networks and a solution that has worked for some is described there.

Hope it helps you out...
[Acer Iconia A500] mavness:
Same for me. I had wifi probs, did the 2 in a row reset, fixed it. I rarely use the tablet, picked it up last night to test an app im making...stuck in wifi loop again. Did 2 reset, fixed it. However all my widets and crap are gone AGAIN. There was an acer update, I did that. Lets see what happens next :\
[Acer Iconia A500] Jerra:
Wifi Patch available

Guys, I downloaded a patch from the Acer Australian website:

http://www.acer.com.au/ac/en/AU/content/drivers - and select Tablet - A500 - patch

Did as the instructions and it fixed my dhcp problem. There is also mention of the patch somewhere in this forum available to download from the Canadian website so maybe every country has it.

Don't know how long it's going to last though.

Hope this helps.
[Acer Iconia A500] Cactus42:
Also on http://www.acer.co.uk/ac/en/GB/content/drivers site in the same location
[Acer Iconia A500] StephenMC:
I am having same issue connecting with peap. I was able to connect by choosing "Add Wi-Fi Network"
[Acer Iconia A500] rmingee:
My tablet already has the OS version they recommend to update to after installing the patch, and I STILL have the wifi problem with my home network. It is always my home network that fails to connect. I can't believe even after an alleged fix this is STILL happening. It is totally inexcusable. I guess I need to get on the phone with Acer support and let them know it is still broken. And believe me, I have tried tens of resets, in combination with forgetting the network, enabling/disabling wifi - none of it works anymore. Even a factory reset through CWM doesn't work. I had listed a set of steps some time ago in this thread, and that exact set of steps no longer works. This is a HUGE problem.

And yes, I tried installing the update anyway despite already having that version - nothing.

-- robert
[Acer Iconia A500] czr:
Am on a stock 3.1 A500 for my wife and tried the soft reset like 10 times without working. Toggled on and off the wifi as well as trying a couple different sources. I didn't want to delete any files or play with config too much so I manually "Added Wi-Fi network" like you suggested and it finally connected. After it connected, there was an update that will hopefully will fix the wifi issue.

Imagine the pain in the ass this is going to be for the masses of people that don't research.
[Acer Iconia A500] rmingee:
As my previous post indicated, it is not likely the update will truly fix the problem. It may improve it, but I don't imagine it will truly fix it, because even with the update I am still experiencing it. Good luck, though - maybe it really is just me...

-- robert
[Acer Iconia A500] rmingee:
Well, so I think I finally figured it out, though it really doesn't make a whole lot of sense. I had inadvertently set my router a few weeks back (when this problem first appeared and I turned off security entirely to see if that would fix it) to support only WPA2-AES, not both WPA-TSK and WPA2-AES. But everything worked fine for a couple of weeks that way until it decided it didn't like it, and in the end that is the ONLY thing that would fix it, including flashing different ROMs and multiple factory resets. Either it supports that protocol or it doesn't - I don't see how it can take it a week or 2 to decide it doesn't like it. Of course, it could simply have been the act of effectively resetting the router that did it, and not the protocol change (though that was probably a good idea anyway, to support a wider range of devices). I still don't think they completely understand all aspects of this issue.

Man, I really hate dealing with this - I shouldn't have to spend hours trying to get something (that is supposed to make my life easier) to perform a basic and fundamental function...

-- robert
[Acer Iconia A500] DrAzzy:
I had the "connecting..." "disconnected" "scanning..." issue.

Nothing worked - acer's patch, paperclip resets (normal, and timed to be done during scanning...), deleting the dhcp file, even a factory reset.

And I couldn't get the advanced wifi settings app onto the tablet, because I didn't have a way to get internet access, and the android market wouldn't let me download the apk (it would just be like "This app will be sent to your A500 shortly" - useless!).

What did work... turned all wireless security off (same SSID). Connect - but it had no internet connectivity. No idea why, nothing else had internet connectivity over wifi with security off either. Then I deleted the old entry for the network, changed the security settings on wifi back to what they were, which left me in the "Obtaining IP address from..." loop. At that point, I was able to resolve the issue by switching to a static IP...

That's 6 hours (failed attempts + rebuilding everything after getting wifi working after what was an ultimately unnecessary factory reset)
[Acer Iconia A500] Charleydog:
Android problem

I cannot connect via WiFi to the internet using my Acer Iconia 200. I have tried both the reset and reboot with no success. It must be the tablet because the laptop connects seamlessly. Could you explain your procedure in more detail for somebody not too familiar with tablets. I had no problem when I bought the tablet but after not using it for two months, it now refuses to connect.

Thanks.

Patricia
[Acer Iconia A500] shadowmikeshadow:
happened to me while ago.. just flip wifi off and on, try shell reboot(root) actual reboot or worst case... reset
[Desire HD Q&A, Help & Troubleshooting] tykoon:
I have my Desire HD connected to my pc and it is in recovery.

I want to adb push a file to the /system.

Do I need to mount the /system in Clockworkmod first or do I just push the file?

Thanks
[Desire HD Q&A, Help & Troubleshooting] Andy:
Firstly you need root. Once you have that simply use,

adb remount
adb push <local file> <remote destination>

E.g,

adb push bootanimation.zip /system/media/