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[Q] Black Screen on Instagram/Vine (bQ tablet)

I am rather new here so I don't really know were to post this. Anyways, I have a bQ Maxwell Plus tablet with android 4.1.1. The problem is everytime I try to watch a video on Instagram or Vine I am presented with a black screen and the sound of the video. I tried reinstalling the apps but nothing seems to work. What can I do solve this?

Nexus 5 vibration trouble :(

Hello everyone ... on my Nexus 5 once again happened some incredible problem with vibration ... Here's the thing: Last night my Nexus just lay on the bed and when I took it, at this point I found the lack of vibration. First, I turned on Vibrate when pressing the navigation keys, and found no vibration. At first I began to sin on the vibrating motor, but I remembered that I was already have this problem a few months ago, in the same way. When I downloaded from the Market program to test the vibration and turned her to work constantly, I found that the vibration motor that works but is very weak, as if barely barely turns .. As if he did not have enough energy. But! Motor is spinning so bad until not "turn off the screen." After blocking in a few seconds the vibration motor is working again as if nothing had happened! As well and clearly. However, once you unlock it as soon as the problem returns, vibration works very poorly. I have tried different programs for vibration control, no result. Found a video on YouTube of the problem, attach below. If the problem is simply to reiterate, I would like to know the cause .. This problem is very infuriated me yesterday, vibration at all almost no and I missed a few calls. I understand the engine is all right and I think that this is some sort of deep software problem...
I have already booked two motors, then try to replace, but not sure it will help .. Phone never fell or dropped, handle carefully. (but the body have a little small scratches ) A very long time looking for information on this issue on the internet, but found nothing ..
I dont want to go to the service center, I want to understand itself, with your help, of course ..
Factory reset or Reflashing ROM to any other doesn't help too...
Model - D281 16GB white.
ROM - CM11 Snapshot M9
Kernel - ElementalX 1.04cm
Recovery - TWRP 2.7.1.1
Can not listen to what people say on the video, the main thing to hear the vibration motor.
P.S. Sorry for my bad english, I'm from Russia and I write through Google translator... Hope on your help, guys..

Touchscreen issue (bad grounding)

When I put the device on to any insulating surface such as pillow/bed/couch/table I cannot normally operate it. Touch is being interrupted very frequently. This means in practice that I unintentionally press links while sliding through web pages, it is impossible to organize icons (since icon is dropped quickly), pinch-zoom is difficult, unlocking the device is hard, when text-typing it often doubles the letters etc.
Problems goes away as soon as I plug the charger, or take the device in my hand. This looks to me like a grounding issue, which was annoyingly present in some of OnePlus One and Nexus 7 devices in the past. Desperate users were hoping for a software update to solve the issue but it never came out.
Is anyone else experiencing similar problems with Mi 4c? I also tried flashing different MIUI versions, nothing helped.
Here is a video demonstrating the issue (you can enter hardware test menu by calling *#*#64663#*#* and try it by yourself):

I tested, mine is ok

I never really use my phone that way but out of curiosity, I tested it. Can confirm, issue is there. Touch screen goes crazy when scrolling facebook posts, chrome browser, possibly anywhere until I lift the phone up.
Just noticed that I needed to tap and scroll up/down harder than I used to otherwise I would miss it and the scroll would stop halfway through and will tap on whatever it is on the screen when it stopped.
Basically when I don't tap hard enough when doing the scrolling gesture, that's the time that the touchscreen goes crazy

works proper at my mi4c

I had the exact same problem. It is a defective screen. The problem started appear for me after 3 days of use, so I returned it to the store for an immediate exchange. I am not sure if you are in China or not, but if you are, you can just walk into the store and get a new one on the spot.

for me works perfect

Works ok on mine

Works fine here...

I can't even get the touch test started, running cm12.1, dailing *#*#*2664#*#*does nothing, as well as no other I've tried tested

Stenudd said:
I can't even get the touch test started, running cm12.1, dailing *#*#*2664#*#*does nothing, as well as no other I've tried tested
Click to expand...
Click to collapse
Try it with some app. For a single-touch this one is just fine: play.google.com/store/apps/details?id=com.tsaysoft.touchtest
It draws a continous line and if you lift a finger (or if you have faulty screen) the line disappears.
To test a multitouch function you can play with: play.google.com/store/apps/details?id=com.the511plus.MultiTouchTester

andrazek said:
Try it with some app. For a single-touch this one is just fine: play.google.com/store/apps/details?id=com.tsaysoft.touchtest
It draws a continous line and if you lift a finger (or if you have faulty screen) the line disappears.
To test a multitouch function you can play with: play.google.com/store/apps/details?id=com.the511plus.MultiTouchTester
Click to expand...
Click to collapse
Thank you, I'll try those.
---------- Post added at 09:56 AM ---------- Previous post was at 09:20 AM ----------
Mine is working as expected as well

found solution(the grounding problem is still a thing but this makes it less of an ass)
1) root the phone or just use the developer rom from xiaomi
2)then install Pimp my Rom from google play and grand root
3)go to tweaks-> touch-screen & display-> multi touch amount
and put it on 5.

Hello,
Yes. As a proud owner of one (unfortunately defunct cause I dropped) nexus 7 2013 I can confirm that the behavior is the same... Definitely a grounding problem.
When you leave the phone on a pillow or couch without holding it,bthe screen response is erratic. When you hold it or attach charger.. No problem.
Still beautiful device (the 4c), especially for the price. Snappy.
And smiu is very good made. (not a fan of miui roms...)

This happens only on 16gb version? What about using a plastic case? Does it solve the issue?

Ydraulikos said:
This happens only on 16gb version? What about using a plastic case? Does it solve the issue?
Click to expand...
Click to collapse
I have the 32/3. Same behavior. Not tried wit a case..

i have also found another touchscreen problem, multitouch on sides doesn't work, here the video
https://www.youtube.com/watch?v=uPC7Z2ploxc

Lenovo A7010 (Vibe, X3 Lite) Gyroscope / Accelerometer Issues

Hey guys, I recently bought this Lenovo Vibe A7010 phone. I'm really liking it, but noticed that the Gyroscope and Accelerometer are not working properly.
I'm not sure if it's a software/rom issue, since I updated the phone immediately after getting it, or hardware. If it's hardware I'll take it to tech support to repairs.
Thing is, I've seem some people around complaining about the issue and talking that it might be a bug from the newest updates...
What happens is that gyroscope/accelerometer are always tilting towards one direction (to the right and randomly down and left in my case): 360º Youtube videos are unwatchable. Google maps accuses me of spinning around in my position.
I was eager to test the Google Cardboard with this, but it seems like it will be impossible.
I entered Engineer menu through a code and there is a calibration option, but it doesn't work properly. It makes some adjustments but nothing changes.
There's another menu that is accessible through a reboot with power+volUp, but it all in chinese.
Here are some pics and videos of the bugged sensors:
https://vid.me/AXTa
https://imgur.com/a/Ob3Se
Do you guys think it's software, or should I just take it to the store and ask for another?

Poco X2 Touch Issues, Just me?

I had already made a similar thread(https://forum.xda-developers.com/poco-x2/help/backspace-virtual-keyboard-missing-t4069481) but I did not want to revive that or change that, maybe Mods can delete the old one.
Anyway, I am facing touch issues with the backspace but after some testing, I found out that it is bottom two corners. Topside is hard to diagnose.
I am linking a video showing these issues.
The problems I faced are
1) Backspace has some lag compared to other keys
2) sometimes backspace does not even register
If you watch the video you will see that sometimes even though touch is being acknowledged there seem to be some software edge padding or something which does not let the UI react to the touches, or it may be a hardware issue, idk. In the video, while touching at the corner you will see some gaps in-between touches which are actually totally unregistered touches which come as gaps in between touches.
Do you guys also have this issue?
App used : Multi Touch Test
Watch video at 0:15, 1:35, 2:55
https://www.youtube.com/watch?v=QygeYqOJ-ow

@tinted
Your touchscreen looks fine cuz it correctly displays white dots you touched.
I guess Miui ignores touch events if Miui thinks there's not enough touched area.
I think Xiaomi may adjust it in the future.
I tried that testing app, my K30 shows same with your video.

Martensite said:
@tinted
Your touchscreen looks fine cuz it correctly displays white dots you touched.
I guess Miui ignores touch events if Miui thinks there's not enough touched area.
I think Xiaomi may adjust it in the future.
I tried that testing app, my K30 shows same with your video.
Click to expand...
Click to collapse
Do you also have a problem with backspace being different in response compared to other keys?
I asked some other Poco X2 users in telegram group and they said they dont have that issue.

tinted said:
Do you also have a problem with backspace being different in response compared to other keys?
I asked some other Poco X2 users in telegram group and they said they dont have that issue.
Click to expand...
Click to collapse
I haven't faced any issue about keyboards yet...
How about installing eu rom?
I'm on latest beta(weekly).

Martensite said:
I haven't faced any issue about keyboards yet...
How about installing eu rom?
I'm on latest beta(weekly).
Click to expand...
Click to collapse
I am returning the phone since its only been 4 days but after I get a replacement I will root and stuff. Don't know if I will change the ROM entirely, will have to do some research on what features I will get vs what I will loose.