yashsingh1/xdaforums huggingface dataset:
[HTC Sensation] DennisBold:
Have you rooted the phone ?

I'm assuming you haven't... If you have, disregard the instructions below and boot into recovery to wipe the Cache/Dalvik Cache.

Try clearing the cache by doing the following:

Hold down the power button and the volume down button simultaneously until you see three android images on the bottom of the screen

You should be presented with a few options, press the volume down key to highlight recovery

Press the power button and wait for the phone to boot into recovery

When you see a red triangle, press the power button and the volume up button simultaneously

You should see some more options. use the volume down key to select "Wipe cache partition"

Press the power button

You should see 'Cache wipe complete.'

Press the power button to select reboot now

If that doesn't solve things you may need to do a factory reset which involves wiping the data partition where all user-data, settings and applications are stored.
[Nexus 7 Q&A, Help & Troubleshooting] Izzue:
Anyone experienced this Issue? I seem to get it every now and then.
[Nexus 7 Q&A, Help & Troubleshooting] fleshdeep:
Constantly. I thought I was going insane.
[Nexus 7 Q&A, Help & Troubleshooting] plympton:
I'm getting "non touch". I'm hoping it's because of the screen protector (BestSkinsEver bulk cut to fit) I just installed (water based == possible conduction interference), but it's really impossible to use. Never happened on any other Capacitive Touch device - i* or Android. Weird.
[Nexus 7 Q&A, Help & Troubleshooting] clockcycle:
Perhaps it's the new Corning Glass Google/Asus is using?

You have to let the water/solution dry properly first to test.
[Nexus 7 Q&A, Help & Troubleshooting] robdroyd:
I've had it happen too.

Now I don't hover my fingers as close to the screen as I did when I first got the N7 and that solved the issue.
[General Questions and Answers] rskdvd:
Dear All,

I have a newly purchased Archos 70 IT (250G) version, as I want to use it as a photo bank to store my photos in my Canon 40D, I read a lots of threads on XDA and finally found out the most workable way to copy my photo to Archos 70H is downgrade my O/S to 2.0.54 from 2.3.81. And Connecting my device with a Nokia CA157 cable (USB OTG cable) to another USB cable to my Canon 40D. Then I can read and write on the CF card (32GB Extreme Pro) without any problem.

However, the performance of 2.0.54 is too bad... I want to install Urukdroid 1.6 in my Archos 70H, but Urukdroid 1.6 is developed based on 2.3.xx which would not allow me to connect my Canon 40D to copy photos.

My question is, if I install Urukdoid 1.6 in my Archos 70H, can I boot it into

original stock O/S 2.0.54?

Any Urukdoid 1.6 roots user can help me answer this question? Just simply boot your Archos in Android in boot menu, thanks!!!!
[HTC Rezound] croonux:
Since I'm on my phone I'll make it quick does any one else lose complete signal of 4g? I'm not connected at all even though I'm on a signal 4g area oh and I've been s off for over a month and problems just started last week and it seems my phone never connects to 4g l
[HTC Rezound] DbZ Gokuu:
Try RUU'ing and then doing a factory reset in bootloader. That worked for me.
[HTC Rezound] dangerousjenny:
There's been a lot of problems with people staying connected to 4g in the past two months. There are already a few threads on it. I called up Verizon and they said they are working on a solution. Some people said they got a new red sim card that worked. I have heard its new so I haven't check to see if my sim switch was to the red one or not. I would reset the phone and try the sim switch if it isn't working call Verizon to add to those who have an issue. IRA not just rezounds its all 4g phones accross the country. Right now I am on 3g most the time in a 4g area (it was already 4g when I got the phone in novemeber no probs till June). Anyhow hope I helped.
[HTC Rezound] CharliesTheMan:
changing my preferred network choice in the radio settings from "CDMA+LTE/EvDo" auto to "LTE,CDMA" makes a big difference when I'm having that problem in my area.
[HTC Rezound] Blakmagic:
I woke up this morning to 4g. :) Mojave desert so cal. Never thought it would get here.
[Kindle Fire General] atcafw:
Anyone know how to download apps from the play store that aren't supposed to work with KF but actually do, using lithium's jandycane? I tried editing the build.prop but it gave me an error every time I tried to save.

[Edit] just realized I posted in general instead of QA...sorry
[Hardware Hacking General] sfern25:
Hey guys,

Recently I have been seeing companies releasing devices for Android that are not phones e.g.

Android USB Sticks:

techland.time.com/2012/05/18/pc-in-your-pocket-74-android-stick-goes-on-sale/

or more recently a game console:

kickstarter.com/projects/ouya/ouya-a-new-kind-of-video-game-console

I'm in University now studying Electrical Engineering and I've had an interest in electronics since I was young, so now I thought it was possible for me to design my own device. But so far my only luck with getting anywhere was drafting designs of the device and finding development boards online. Sure i could start off with development boards to test software (which i'm planning to do) but I am quite lost as to where I should go next. For example where to I get a manufacturer to produce my device or where to purchase a processor/motherboard that is custom designed for my project.

It would be really great if someone could point me in the right direction,

Scott
[Hardware Hacking General] Quiggers:
that's an ambitious project, I've just finished 2 degrees in EE and in the long term i'm looking to do similiar projects, but right now it is beyond my capabilities. But what i have done is buy a very cheap dev kit from STmicroelectronics with their ARM m4 chip onboard. (STM32F4)

this chip should be powerful enough to get started on and all the pins are broken out, plus the device includes a programmer and is powered over usb.

It was less than €20 but is still sat in its box as I've a lot to learn before cracking it open.

Have you any experience with RTOS for ARM, Keil offer a free trial version of their well respected uVision MDK software, it supports the above board directly and removes the need to configure a tool chain etc. Personally i'm trying to get eclipse on ubuntu to program it bit Keil uVision will allow me to blink LED's etc so long as my program is under 4Kb.

I too am only starting down this project but i hope the little i know has been of some help.

As for custom devices, well thats a whole other ball game, you will need to make out a schematic, then a board layout, then gerber files. After that you need a small run on a pick and place / reflow line. It's very rare these work out first time round, attention has to be paid to details like noise sinking, pull up resistors, matching logic levels and optically isolating external devices etc.

It's great that you are looking beyond your course material, I've learned much more from personal geekery rather than just taking notes from a lecturer. Anything you do outside the course will benefit you in a better degree at the end.
[Hardware Hacking General] Rebellos:
I've never been designing device from scratch, and I'm also just first grade student. Anyway I could imagine how this might look for small company or single person:

1) Decide what do you want to build-up. Easiest todo is custom dev-board, it can be always redesigned and packed into tablet case. The hardest to-do is mobile phone, and it's nearly impossible to create such thing due to high level of embedding everything, and need to sign pretty serious agreements with RF CPU (and other things like transceivers, antennas, duplexers) supplier like Infineon or Qualcomm.

2) Think what main components you'll need, like LPDDR, SoC (CPU), PMIC (SoC manufacturer usually recommend PMICs to be used and provide reference board schemas for using both), battery fuel gauge, charging controller (both might be built into PMIC, depends on model), screen+touchscreen (there are dozens of such, one might want to decide its size already, but in case of dev-board like build it usually can be replaced by some smaller/bigger with small HW modifications or without modifications at all), sensors like gyro, compass, pressure, light, whatever.

3) Search through suppliers websites and decide what models of ICs you want to use (I'd pick only open hardware), order engineering samples and get reference schemas, rather start from SoC(OMAP4460 for eg.)+PMIC pair, then decide about the rest.

4) Don't forget about extension slots like USB ports, DC supply, serial converters, whatsoever.

5) Start designing PCB board. IMO it's impossible for begginer to project any usable PCB for embedded system, I'm begginer and I'm failing with simplest boost HF DC/DC converters (like 10-20 parts on board), while such board would have thousands of elements on it, and multi layer board to fit it everything in some rational size.

6) Find company that will make prototype for you - they should make board + solder all the components you provide them - one with no professional (and very, very expensive) soldering stations is not able to solder BGA components at home.

7) Test it out.

Relatively, assuming that main components are free engineering samples, this might be not so money-expensive way to create some useful stuff. But for sure it's very, very time expensive, and begginer alone will nearly for sure fail.

//edit:

I just re-read my post and figured it might be pretty demotivating. I'm not saying it's impossible, but I'd suggest you to start from something easier - ARM dev board is the thing you need. As Quiggers stated above.
[Hardware Hacking General] Rebellos:
Just noticed these - cheap and powerful dev boards:

http://wiki.xbmc.org/index.php?title=Allwinner_A10#Other
[Hardware Hacking General] csir:
Custom design

I'm looking to do the same, has this worked for you? I'm looking to build a custom android based mobile device as the original poster. I haven't had any look finding the correct electrical or device engineer to provide me any assistance. Are you available to assist?
[Hardware Hacking General] yevar:
Technexion

I have used OMAP3530 CPU. The TAO3530 is a good starting point and you can get a Tsunami board.
[Hardware Hacking General] KindsKoPP:
s8500 board with tablet touchscreen

hi dudes,

i have an old wave s8500 but the screen is broken. and i have an old tablet screen 7" from herotab8/dropad8.

can i use the tablet screen with the s8500 board? is not drivers necessary for the touchscreen? and where will i get the drivers?

and do i not need the datasheets of the pins to connect?

:o)
[Hardware Hacking General] bitbang3r:
What we REALLY need is for someone to make a SoC that's basically like the one in the Raspberry Pi, but substitutes a FPGA for the GPU that's big enough to re-implement GPU functionality... long after the chip has left the fab & gotten soldered onto an open-ended generic ARM stick with no specific purpose, and thus manages to officially avoid getting infected by DRM-mandated licensing terms (ie, anything *officially* licensed to support h.264 or HDMI) that keep making totally open drivers nearly impossible. After all, if the drivers were 100% open source, there's no way they can stop you from commenting out the part responsible for implementing Cinavia, or lying to endpoint devices (like your home theater amp) about HDCP compliance ;)

To deflect infringement claims, a company that made Android boards from the FPGA-equipped SoCs could make it with a soldered-on DVI port instead of HDMI (HDMI connectors are encumbered by viral licensing, DVI isn't), and put a reference design on their website for a wacky octopus cable that used the DVI-A pins to output unbuffered 3-bit pseudo-VGA, and used the remaining pins as a high-density breakout connector for a bunch of half-duplex RS-485 ports and GPIO lines that just *happened* to use DVI/HDMI logic levels ;)

Of course, you'd never be able to legally sell a product based upon that board to end users in the US with the taboo technologies supported "out of the box", but other companies outside the US not subject to our self-inflicted wackiness could, and hopefully WOULD, buy enough of those boards to drive the price down enough to make them cheap for American hobbyists to buy on eBay and use for our own guerrilla Android-powered hardware projects.

In theory, the Xilinx Zynq 7000 series sort of does this... but at the moment, they're so ungodly expensive, you could almost buy a half-dozen Nexus 7 tablets for the price of their Android-capable dev board.
[Hardware Hacking General] networmx34:
sounds great dude
[Hardware Hacking General] papafizzle:
Nice

Nice post
[Hardware Hacking General] Lauggidadiero:
Hardware for Android D

Its not even turning on now...guess i will have to take it to a computer shop now, are you sure it has to be major things like "dead hard drive to a burned up chip to a bad motherboard."?
[Nexus 7 Q&A, Help & Troubleshooting] AZImmortal:
I've read that the Nexus 7 charges via regular micro USB (no proprietary port or cable) and that the charger is a 2A charger. Has anyone figured out the proprietary aspects of the charger that signal to the Nexus 7 that it's connected to the charger and that it's ok to draw 2A?
[Nexus 7 Q&A, Help & Troubleshooting] AZImmortal:
Bump.
[Nexus 7 Q&A, Help & Troubleshooting] tylerwatt12:
I think it just dumps 2A into all the devices. 99% of USB devices have resistors in them to limit the current
[Nexus 7 Q&A, Help & Troubleshooting] pixelchemist:
It needs a 2amp charger... 1amp will keep it on indefinitely but wont charge... with less than 1amp (say keyboard USB port) the battery will lowly drain on while the power indicator shows charging and eventually the screen will go nuts and the device will crash/shutoff
[Nexus 7 Q&A, Help & Troubleshooting] dchn2:
Don't think you are accurate. If computer usb can charge the device (0.5A from usb port on computer), any charger can charge n7, albeit charger with lower current will take longer to fully charge the device. Tried 1A charger on N7, no problem.
[Nexus 7 Q&A, Help & Troubleshooting] bitbearmi:
There is the standard CYA in the manual to only use the cable and charger supplied with the unit. If it is fully powered down, pretty much any microUSB will charge it... eventually. That's not necessarily the best thing for the battery. If the power is under 2A as suggested, depending upon what you're doing with the tablet, it may just be enough to keep it running, or, could actually drop to zero even in use. (This happened with my Nook Color, for example). YMMV, but on the stock charger, the recharge is pretty quick. My only quibble is that there is no notification light to alert you to charge completion, or other notifications you might get (gMail, texts through Google voice, etc.).
[Nexus 7 Q&A, Help & Troubleshooting] AZImmortal:
This is incorrect. It's not up to the charger to push 2A, but rather up to the device to pull 2A through signaling of specific voltages on the data lines. For example, if you were to normally plug any tablet besides an iPad into an iPad charger (2.1A), the most you can expect to pull is 1A because the tablet doesn't know that it's connected to a 2.1A charger. The internals of the iPad charger will only tell an iPad that it's connected to a 2.1A charger. In order to charge at 2A with another tablet on the iPad charger, you need to do something like this example with the Galaxy Tab:

http://xdaforums.com/showthread.php?t=845844

Or buy a pre-made adapter:

http://www.dealextreme.com/p/usb-ma...ung-galaxy-tab-p7500-more-black-127843?item=6

So the Nexus 7 charger must have something going on to tell the Nexus 7 that it's connected to the right charger because it can't try to pull 2A from every USB port that it's plugged into (some computers will actually shut down if something tries to draw too much power through the USB ports).

NoLED can alert you about notifications by flashing icons corresponding to the notification on the screen. It turns the screen on, which will obviously drain your battery, but there's a setting to disable turning on the screen when the proximity sensor is "close", so what you can do is put it screen-side down when it's off the charger to keep it from turning on the screen. It's not as elegant as a notification LED or backlight notifications (which is what I'm used to), but it's better than nothing.
[Nexus 7 Q&A, Help & Troubleshooting] gbroon:
Something I'd like to add not sure if its true but it was an explanation relating to this I saw when shopping around for an in car charger and makes some sense.

Android will reduce the power it pulls from a USB port if it detects it as a data port as opposed to an AC connection in order to conform to the official USB specs.

Apparently some chargers are wired incorrectly (data pins should be cross connected in chargers for it to be recognised as a charger if I remember the description) and will be picked up as a data port. Some devices will just use as much power as possible on data ports but ones that conform to the specs will take only the amperage outlined in USB specs.

Like I said its just something I remember don;t shout at me if I'm talking mince.

Sent from my Transformer while the N7 is lost in the Play Store Black Hole.

16gb N7 UK ordered 3rd July.
[Nexus 7 Q&A, Help & Troubleshooting] AZImmortal:
It's mildly related to proper charging. Basically, for any tablet, there are three charging states. The first is USB mode, where the data pins aren't shorted (as if the device was connected to a computer's USB port), which draws a maximum of 0.5A. The second is AC mode, where the data pins are shorted, which draws a maximum of 1A. The third mode is what I'll call high speed AC, and this is the mode we're after. Not only are the data pins shorted, but voltage is being applied to the data pins in a specific way to each device family. When the device detects this mode, it'll think that it's connected to its own charger and try to draw up to 2A.

Every device family has its own required voltages on the data lines, and by families, I mean products that have interchangeable chargers (like iPads, Galaxy Tabs, Transformers, etc) so if we can figure out what the Nexus 7 needs, then we can use any 2A charger with it (like using an iPad car charger). I just realized that others have said that they were able to charge at high speed with their Transformer charger, so I suspect that we can refer to Transformer charging adapters to get it working.
[Nexus 7 Q&A, Help & Troubleshooting] jeh_:
I haven't taken apart my Nexus 7 charger to see what's inside mainly because I've only got the one...

but I did verify that the D+ and D- pins on the USB are shorted, but there is no discernable voltage being applied to either.
[Nexus 7 Q&A, Help & Troubleshooting] jeh_:
So I set up my meter (and sacrificed my really short asus OEM charging cable) to measure the current draw while charging... this is what I found:

OEM charging cable appears to be just a regular old USB cable, unless there is something happening in the micro usb end, which I really doubt.. but I don't have any adapter to check if this is the case.

When D- and D+ are floating and not shorted together, the Nexus 7 draws ~1A but the charging indicator does not come on.

When D- and D+ are shorted together the Nexus 7 draws ~1A and the charging indicator does come on.

I could not get the Nexus 7 to draw 2A. Maybe I broke something :)

-J
[Nexus 7 Q&A, Help & Troubleshooting] AZImmortal:
Thanks for making the sacrifice. I guess more testing is needed. :)
[Nexus 7 Q&A, Help & Troubleshooting] nevertheless:
I think the theory that it doesn't draw more than 1.0a may be correct. But it is still finicky about the charger. I have a palm OEM charger with palm cable and it doesn't charge the N7. I have a Nokia 1.2a charger and Blackberry 1.8a charger and they both seem to charge near the same rate, as fast as the Asus OEM charger.
[Nexus 7 Q&A, Help & Troubleshooting] kmandel:
Just as another data point, I tried connecting my n7 to the ipad ac charger, which is a 2A charger. It doesn't charge at all against the ipad charger.
[Nexus 7 Q&A, Help & Troubleshooting] dmalovic:
Anybody with the N7 that charges on the iPad charger? If so, I want to return it.

Domi
[Nexus 7 Q&A, Help & Troubleshooting] kkeo:
Limited charging options

It won't charge off an OEM iPad charger, just checked. It also won't charge off a Monoprice 3x outlet with 2x 2.1a usb directly connected to the usb ports or a 2.1a backup battery. Damn device is really picky about the source.

It will charge off my Touchpad and Vizio tablet charger.

I'm really bummed out it won't charge off the monoprice 3x outlets 2x usb since I bought a bunch of them when they were on sale and put them through out my house.
[Nexus 7 Q&A, Help & Troubleshooting] The Afroman:
Same here.. just tried an ipad charger and it didn't work.. this is the oem ipad 3 charger. Also tried ipad 1 charger (should be same thing) didn't work.. going to try a charger for a Dell Streak 7.. see if it works.
[Nexus 7 Q&A, Help & Troubleshooting] burpootus:
Mine is also very picky. I used the stock Asus charger with a longer micro usb cable and it didn't charge while I was using the tablet over a period of around an hour. It maintained the % charge of the battery but didn't increase it. When I went back to the stock cable, it charged during use. Wouldn't be a real big deal if they hadn't scrimped on the cable to where it's only 3 feet long. What a pain.
[Nexus 7 Q&A, Help & Troubleshooting] jazzfreek:
A little OT, but my ASUS 1366 motherboard has an update you can install that allows the USB ports to charge an iPad at 1 amp instead of the normal .5 amp. I haven't tried it with the N7, but I suspect it won't work. Maybe another update will be released considering they make both devices, although my mb is kind of old...2009. I wonder if the USB2 specs allow for 2A charging and also if the newer USB3 spec allows more amps to be provided. If it doesn't, it should considering some of the latest power hungry devices.