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Lollipop and My Nexus 7 (2012)

I had problems after updating my nexus 7 to lollipop.
But found a factory reset speeded my tablet up.
Just have the continual problem of all day charging with it now.
 
Have Lollipop on my Nexus 7. I did it using WUGs (just flashed and rerooted, reinstalling TWRP-- it didn't even mind that I had a Tilapia bootloader on a machine that has otherwise been converted to Grouper;) ) Running faster and smoother than it has in a long while.

For the charging thing, the Nexus 7 (2012) is particularly sensitive to output as it's OEM charger had higher than normal output (2A). Most charges only put out 1.5A I believe. See here:

https://support.google.com/nexus/answer/2781785?hl=en

I even bought a spare on Amazon when I realized using the OEM charger from ASUS really made a huge difference on speed and effectiveness of charging. They were cheaper when I bought my spare than they are now, unfortunately.

http://www.amazon.com/ASUS-Nexus-Of...id=1417280297&sr=8-2&keywords=charger+nexus+7

Upshot: the output of the charging cable from the wall makes a big difference. Even worse if you are trying to use your computer to charge. Most standard charge cables have low output.
 
I've been having a lot of freezes and reboots since updating to 5.0 as well. I'll take a look at what's installed on it and see if I'm willing to try a factory reset at this point. If I do factory reset, I'll report back on if it helped or not.

Hook said:
Have Lollipop on my Nexus 7. I did it using WUGs (just flashed and rerooted, reinstalling TWRP-- it didn't even mind that I had a Tilapia bootloader on a machine that has otherwise been converted to Grouper;) ) Running faster and smoother than it has in a long while.

For the charging thing, the Nexus 7 (2012) is particularly sensitive to output as it's OEM charger had higher than normal output (2A). Most charges only put out 1.5A I believe. See here:

https://support.google.com/nexus/answer/2781785?hl=en
Click to expand...

The stock charger that comes with the 2012 Nexus 7 is rated at 2A. But as with all chargers, it will only output what the charged device draws. A 2012 Nexus 7 draws around 810mA (0.81A) when using the stock charger (I measured this with a meter).

Hook said:
I even bought a spare on Amazon when I realized using the OEM charger from ASUS really made a huge difference on speed and effectiveness of charging. They were cheaper when I bought my spare than they are now, unfortunately.

http://www.amazon.com/ASUS-Nexus-Official-Power-Adapter/dp/B008TYKEWS/ref=sr_1_2?ie=UTF8&qid=1417280297&sr=8-2&keywords=charger nexus 7

Upshot: the output of the charging cable from the wall makes a big difference. Even worse if you are trying to use your computer to charge. Most standard charge cables have low output.
Click to expand...

The stock charger has the data pins on the USB connector shorted. This tells the Nexus 7 that it's safe to draw more than 500mA. Most chargers don't have the data pins shorted, since they cater to Apple, and Apple doesn't like having the data pins shorted. Without the data pins shorted, the Nexus 7 draws only 430mA when "charging" (measured with the same meter). Depending on your use, this isn't even enough to keep the battery from losing charge. In my case, using the Nexus 7 for GPS, it would lose charge when connected to a typical car charger. Replacing the charging cable with this charge-only cable fixed the problem.
 
UncleMike said:
I've been having a lot of freezes and reboots since updating to 5.0 as well. I'll take a look at what's installed on it and see if I'm willing to try a factory reset at this point. If I do factory reset, I'll report back on if it helped or not.



The stock charger that comes with the 2012 Nexus 7 is rated at 2A. But as with all chargers, it will only output what the charged device draws. A 2012 Nexus 7 draws around 810mA (0.81A) when using the stock charger (I measured this with a meter).



The stock charger has the data pins on the USB connector shorted. This tells the Nexus 7 that it's safe to draw more than 500mA. Most chargers don't have the data pins shorted, since they cater to Apple, and Apple doesn't like having the data pins shorted. Without the data pins shorted, the Nexus 7 draws only 430mA when "charging" (measured with the same meter). Depending on your use, this isn't even enough to keep the battery from losing charge. In my case, using the Nexus 7 for GPS, it would lose charge when connected to a typical car charger. Replacing the charging cable with this charge-only cable fixed the problem.
Click to expand...

Thanks for the great clarification, detail and suggestion.
 
So I was a little nervous to update to 5.0 on my Nexus 5, so I decided to install on my Nexus 7 first to test it out, since I don't rely on my tablet near as much as my phone. I was rooted stock on 4.4.4. I reviewed this forum for several days, reading the pros and cons, and then decided to try it on the Nexus 7 (2012, wifi only).

Thanks to all the help in the forum, these are the steps I took. I made a Nandriod backup and saved to my computer, then I used Wugs NRT to unroot and flash to 5.0. I had to manually download the image file package from Google website, as Wugs program could not download for some reason, but the manual process seemed to work fine. Once I was running 5.0, I immediately did a factory reset. Then I rooted again using Wugs NRT. It seemed stable, so I began to reinstall Apps and Data. So far so good. My tablet had become very laggy lately, but this update and factory reset seems to have helped a little. I'm going to test it out for a week or two and hopefully keep it, but I'm set to roll back to 4.4.4 if needed.

If you have a Nexus device, I highly recommend WugFresh Nexus Root Toolkit. I'm no pro at this, and the toolkit makes it easy to do just about anything you need with an easy to follow graphical user interface.
 
Well thanks to the advice here, my nexus 7 has recovered and touch wood is happy with lollipop lol.

Now I have received the message to update my Asus memo pad 10 and am nervous again

Shall I just go for it and tap update? Or do a factory restore first?

Also I have an SD card on my Asus.
What do I do about that?
Do I remove it first before I do anything?

Also with unmounting will I have to actually remove the SD card too?
Sorry all this is new to me
So if someone can lead me through it it would be great.
 
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do the update first, and then a factory reset. The update should not touch your external SD card, only the internal storage. But if you feel better about removing it first, then do that.

Remember, a factory reset will set the device back to like it just came out of the box, in other words it will wipe everything... So if you go that route, and you have data you need to keep, do some sort of back up first or you'll lose everything.
 
Thanks. Why do I do the update FIRST and THEN factory restore?
Don't understand.

Also if I click unmount my SD card do I still need to take it out?
And if not how do I remount it?

Once I get the answers to these 3 questions am going to have a go lol
 
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Factory reset made no difference.. All the same issues. Gonna just put this tablet to rest and wait for 5.1 to be released. Luckily I have a spare tablet thou its an older android version.
 
jo69 said:
Thanks. Why do I do the update FIRST and THEN factory restore?
Don't understand.

Also if I click unmount my SD card do I still need to take it out?
And if not how do I remount it?

Once I get the answers to these 3 questions am going to have a go lol
Click to expand...

The factory reset after lollipop install will reflash the factory image of lollipop, but it will cause any unintended "leftovers" that could make trouble to be wiped clean.

I would say, if you are worried enough to unmount the card, pull it out in case some process remounts it. Sliding the card back in later should automatically remount it (I believe, but then I'm a Nexus user, so don't have much recent history with SD cards ;) ).
 
Thank you Hook that explains it for me clearly :)
Will be great to try when my LG g3 updates to lollipop.

Sadly the update i just did to my asus memo pad 10 me102a hasn't done much
It it didn't give me lollipop as I thought.
TOOK 2 mins and says I now have version 4.2.2
Not happy.:mad:
 
jo69 said:
Thank you Hook that explains it for me clearly :)
Will be great to try when my LG g3 updates to lollipop.

Sadly the update i just did to my asus memo pad 10 me102a hasn't done much
It it didn't give me lollipop as I thought.
TOOK 2 mins and says I now have version 4.2.2
Not happy.:mad:
Click to expand...

That's why we like Nexus devices. Google, not the manufacturer or carrier, gets us our updates! :D
 
True. But I was one of the many people who updated my nexus 7 to lollipop and it really screwed it up
Thanks to a factory restore it is better now
Though still freezes sometimes
 
After factory resetting my Nexus 7 it does seem a bit better behaved, but I'll give it a few more days before I render a verdict.

HOWEVER, I've discovered that my wired ethernet adapter no longer works with the tablet. Wired ethernet make the Nexus 7 a great replacement for a laptop when having to configure a router or other network equipment at a customer site, particularly when Wifi isn't available (or the password isn't readily known). It appears that it's not a hardware issue, since I get link lights on the adapter, but there's no recognition of the wired interface at all. Thanks a lot Google! :mad:

Edit: if you USB-to-Ethernet is also broken after the Lollipop upgrade update, or you think this issue is important, go to this post reporting the issue and star it. Thanks.
 
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After a few days I don't see much difference from before the factory reset. Apps still become unresponsive and eventually force close. Chrome and Tapatalk seem to do this frequently.

It's one thing to have isolated issues with devices after an update, but quite another to have widespread problems. Google really needs to step up and fix this.

For the record, my device is not, and has never been, rooted.
 
UncleMike said:
After a few days I don't see much difference from before the factory reset. Apps still become unresponsive and eventually force close. Chrome and Tapatalk seem to do this frequently.

It's one thing to have isolated issues with devices after an update, but quite another to have widespread problems. Google really needs to step up and fix this.

For the record, my device is not, and has never been, rooted.
Click to expand...

Yeah, I keep having issues crop up with mine after a brief period where it seemed fine. I can fix for a while, but then it degrades again. I think there is something about Lollipop that is just proving too much. Whether it is because of the Nexus 7's specs or because of ASUS's hardware flaws or compatibility problems with Lollipop, I have no idea. Probably an interaction.

I'm going to take the tablet back to m 4.4.4 ROM and leave it there. I'll be replacing it this coming year. For now, 4.4.4 is just fine.
 
I'm debating doing the same thing. I don't see any benefits to Lollipop that are worth ANY aggravation, much less this
 
Reporting back after lollipop installed a while on my nexus 7
Its starting to freeze again sob sob
 
Well, I jumped ship. Just pulled the trigger on a Samsung Galaxy Tab S 10.5 on sale for about $100 off. It's my Xmas present from my wife. Would have preferred a Nexus but wasn't entirely happy with what I've been hearing about the N9 and decided I wanted more storage (vis SD card). Will settle down my Nexus 7 and give it to my wife to watch Netflix, read books and browse the web.

Will see how long I care about the Samsung warranty enough to keep from breaking the Knox bit. ;)
 
I have a second, not often used, 2012 Nexus 7 here that I allowed to update to 4.4.4 last week (it had been on 4.4.2 until then). I noticed this morning that there were still no prompt to update to 5.0. Out of curiosity I decided to tell it to check for updates (no, I didn't plan on actually updating), and much to my surprise it told me it was up to date.

Has Google halted 5.0 updates on the 2012 Nexus 7?

Given the issues many of us are having after the 5.0 update, it's safe to say that something is wrong. But when you don't have access to pre-update device it's hard to know for sure whether some of what you're experiencing is just in your head. I can say without a doubt after having a 2012 Nexus 7 running 5.0 next to one running 4.4.4, the difference is like night and day. Google seriously screwed this up.
 
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