Help with unknown tablet and display aspect ratio - Android Q&A, Help & Troubleshooting

So my father-in-law gave me an used/bricked tablet that apparently is a A13F9 (chinese, clone, no idea) and I managed to recover it with the firmware on the description of this video:
Tablet PC A13 Cortex A8 Android( Firmware )
My tablet looks like the one on the video. No back camera, only one at one front corner.
But the aspect ratio is messed up (by factory, I'm afraid). In landscape mode the circles are like smashed and in portrait mode there are stretched. You can notice it a little bit on the video.
Is there a solution for that?
I can't be 100% sure but it looks like a A13F9, 9 inches and I don't know eighter what rom is, or if it is official. it's MAPAN something, but I have tried a few and I always have the same problem. I'm 99% sure that the problem is there always, even with original FW and all that.
I think it's just the way the tablet is because it is so cheap and that.
But is there any correction?
I have tried an app called "Resolution Changer" but it only works for a few seconds, it resizes the display but after some seconds the "stock" aspect ratio comes back again n(the display is stretched but the AR remains the same).
Thanks.

Related

[Q] Display resolution

Love the tab but have little issue .
The screen resolution does not play well with my 4 eyes . I tried density changer and absolute system tools to tinker with everything but it still weird to me . My brothers I pad has 1024x768 and I can stare at it all day without my eyes getting tired . How could I change resolution to 1024x768 ??????????????
You can't. The only thing you can do is have the device rescale everything to draw 1024 dots across the display, 768 down. The result... no. Try changing your favorite PC to 1024x768 on a 1280x1024 display, with scaling enabled. It's horrible.
There are font options you can mess with. Haven't done so myself, but there's threads around here that mention it. Also look at the Accessibility features in Settings.
Do pay a visit an optometrist and bring the tablet with you. If you're having contrast issues with the display, there may be something else going on that needs attention. Perhaps he'll just congratulate you for hitting 40 or something, who knows - or maybe you're about to fail that stupid puff test and your own pixels are dying. A good friend of mine lost 70% of his vision in 3 months due to that stuff, because he waited. Don't make that error.
Good luck,
-sbb

Touch is off near edges on large-format screen

Hello all,
I'm relatively new to android, but I've been playing with RemixOS trying to see if it would be a suitable replacement for Android x86 on various devices.
Right now, I'm using RemixOS on a 55" 4k touch display, running at 3840x2160 resolution, with a dpi setting of 160 (to make the OS readable/touchable reliably).
Here's the issue: in the middle of the screen, touch is spot-on accurate, but the closer I get to the horizontal edges, it skews a bit, until it is about a full inch off near the absolute edge. Changing the screen resolution and dpi settings seems to have no effect on touch. It seems as though the OS thinks that the touch area is a couple of inches larger than it actually is.
Does anyone know a fix for this particular issue?
Thanks!
been bashing my head against this problem all day, and I've made a few steps in the right direction: namely, I see what the issue is, but I have no idea how to go about fixing it. When I do a dumpsys display, I see that the resolution that the system is reporting for the monitor is 4096x2160, but that's not what it actually is - it's 3840x2160. This explains the offset touch around the horizontal edges of the screen, but I have no idea how to force the resolution for both the video and touch down to the right resolution. I've tried wm, which does work to correct the video, but has no effect on touch, and i've tried setting the resolution as a boot parameter, which does basically the same as wm.
I hope that makes sense, my brain is mush after today.
halp.

Replacement display => lower resolution?

Hi there.
My cousin dropped his phone and completely shattered the front glass. Phone still worked fine though. Went shopping for a replacement LCD+Touch glass part and finally found a shop which charged him about 60 bucks (this included service).
The display is not terrible, but it's definitely a no-brand spare, it's darker, has a blue-ish tint to it and on top of that, it seems to run on a lower resolution. It works fine for looking at memes on social media and stuff, but text and icons look jagged. The system effectively believes it's running untouched at 1080x1920 (checked via "wm size"), but the display itself is pushing less pixels than that.
He can live with that, though, so here comes my question point for discussion: Is there any practical way to measure the actual, physical resolution of this display?
I just thought it would be nice for Android to render everything at this display's native resolution. Jagged edges wont be gone, but I'm pretty sure using appropiate graphics assets and proper density is better than whatever downscaling is happening here.
Regards.
Get a magnifying glass and count the number of physical pixels.
All jokes aside, if you're rooted you can first try figure out what panel you have with "dmesg | grep panel" in terminal.
Other than that you should go back to the store your cousin got the screen repaired and demand an explanation from them and a refund.
Attached is the output I get on my own Z2 which has a OEM display. I didn't need root for this hehe. Lets see what it looks like on his phone next time I meet with him.
I really think requesting a refund is out of the question, it's been a few weeks since the repair took place and service technicians are a PITA to deal with 'round here.
Anyhow, what I'm worried about the most is software updates on the repaired Z2. Chinese knock-off parts are known to stop working or straight out break when treated with non-factory default firmware. It's sitting on 5.1 as we speak.
Update: The replacement display works after an upgrade to M build .291, the phone is now rooted and equiped with TWRP. I'll try to run
Code:
wm size 540x960
and
Code:
wm density 240
on it and see what happens. It could very well be a half-resolution panel, or a FWVGA one, we'll see.
UPDATE #2: The display looks worse after the fact. There's no saving it haha.
you buy a stock dislay from Sony or others?
Are they jagged or actually interlacing? I got a replacement that looked jagged but then I noticed they were actually interlacing which kind of looks like every other pixel is tearing slightly.
That gave it a jagged look. So it may be the right resolution, but just a faulty LCD. I was sent a new screen on request (ebay).
Either way you should get a replacement.
i got some low res display cheap from china. it was horrific resolution.. device also crashed ala bluescreen-of-death, especially when plying blossom blast or watching fb video. i ordered a display from eu on ebay, and now i'm happy again. and so is the device.
Same here and how to make things better
Flash kcal flashable mod and then use these settings R=255
Green=250 blue=245
Saturation =65
Value=135
Contrast =135
Ok turns out he broke the display again. This second replacement actually looks great, there's little difference when compared side-by-side with my Z2. Good thing he's no longer doomed to a bad display haha.
xRevengerZee said:
Flash kcal flashable mod and then use these settings R=255
Green=250 blue=245
Saturation =65
Value=135
Contrast =135
Click to expand...
Click to collapse
Not sure how this is supposed to help with resolution. Perhaps it would help with the blue tint, but the stock white balance does this as well.
Da Iceman said:
Are they jagged or actually interlacing? I got a replacement that looked jagged but then I noticed they were actually interlacing which kind of looks like every other pixel is tearing slightly.
That gave it a jagged look. So it may be the right resolution, but just a faulty LCD. I was sent a new screen on request (ebay).
Either way you should get a replacement.
Click to expand...
Click to collapse
Now that you mention it, that could explain the scanlines effect when looked up close.
rbrandser said:
i got some low res display cheap from china. it was horrific resolution.. device also crashed ala bluescreen-of-death, especially when plying blossom blast or watching fb video. i ordered a display from eu on ebay, and now i'm happy again. and so is the device.
Click to expand...
Click to collapse
Glad to know that. Who is this "eu"? Europe? Lol I'm out of touch here. Glad to know you got a fine display.
I REALLY hope to never ever need to go through display replacement lottery.
Compared to other devices, this Xperia is not hard to repair, and there are cheap spare parts, and quality parts available from a number of EUropean sellers.
Anyway, it's Friday, good to see this forum again, it's really a nice place.
Oh yeah, my daughter after terrorizing me for years finally made me buy her an iPhone, well... I'm waiting for replacement display nr5 for this 5s in a year now. Lol.
Pixelado said:
Hi there.
My cousin dropped his phone and completely shattered the front glass. Phone still worked fine though. Went shopping for a replacement LCD+Touch glass part and finally found a shop which charged him about 60 bucks (this included service).
The display is not terrible, but it's definitely a no-brand spare, it's darker, has a blue-ish tint to it and on top of that, it seems to run on a lower resolution. It works fine for looking at memes on social media and stuff, but text and icons look jagged. The system effectively believes it's running untouched at 1080x1920 (checked via "wm size"), but the display itself is pushing less pixels than that.
He can live with that, though, so here comes my question point for discussion: Is there any practical way to measure the actual, physical resolution of this display?
I just thought it would be nice for Android to render everything at this display's native resolution. Jagged edges wont be gone, but I'm pretty sure using appropiate graphics assets and proper density is better than whatever downscaling is happening here.
Regards.
Click to expand...
Click to collapse
Can you send me a link for the original replacement display?
napyaninja said:
Can you send me a link for the original replacement display?
Click to expand...
Click to collapse
Sorry, he bought his display from a brick and mortar store, I have no idea where they get their parts from

Lenovo Tab 3 Essential (8GB+Wifi) display aspect incorrect

I ordered the tablet from amazon and received it today, upon booting the tab, i find that the display aspect is a tiny bit incorrect, in portrait mode it looks like everything is taller, and in landscape mode, everything looks wider, is there any fix for this? android version is 5.0.1 and thats the latest update, when i look at youtube videos, the display seems to be fine, any help in this matter will be appreciated.. thanks

Samsung galaxy s9+ completely freeze (pictures included sorry for bad quality)

https://imgur.com/a/UhXtsMz
Today come across some weird bug while using smart view when i change aspect ratio to 16:9 my screen on phone completely freeze and then i have some white spots on top of the screen and something else idk how to explain that but i just turn off tv and everything is back to normal should i be worried?

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