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I have an ASUS Transformer and a ShowWX Classic Laser Projector. The laser projector comes with a VGA dock that allows you to connect it to a VGA device. I purchased an ASUS branded adapter/converter for HDMI and VGA (specifically, mini HDMI to VGA). It connects to the device fine, and the projector seems to recognize that something is there...but it says unsupported video.
This may be because the resolutions are wrong. The projector supports WVGA (848x480) resolution. I think the transformer's resolution has to be set to this, and force it out of HDMI somehow. My device is rooted.
Any advice? Thanks.
delson123 said:
I have an ASUS Transformer and a ShowWX Classic Laser Projector. The laser projector comes with a VGA dock that allows you to connect it to a VGA device. I purchased an ASUS branded adapter/converter for HDMI and VGA (specifically, mini HDMI to VGA). It connects to the device fine, and the projector seems to recognize that something is there...but it says unsupported video.
This may be because the resolutions are wrong. The projector supports WVGA (848x480) resolution. I think the transformer's resolution has to be set to this, and force it out of HDMI somehow. My device is rooted.
Any advice? Thanks.
Click to expand...
Click to collapse
did you find any solution.. im having the same problem with an HTC EVO 3D and the Showwx+ with the HML and VGA converter
delson123 said:
I have an ASUS Transformer and a ShowWX Classic Laser Projector. The laser projector comes with a VGA dock that allows you to connect it to a VGA device. I purchased an ASUS branded adapter/converter for HDMI and VGA (specifically, mini HDMI to VGA). It connects to the device fine, and the projector seems to recognize that something is there...but it says unsupported video.
This may be because the resolutions are wrong. The projector supports WVGA (848x480) resolution. I think the transformer's resolution has to be set to this, and force it out of HDMI somehow. My device is rooted.
Any advice? Thanks.
Click to expand...
Click to collapse
In troubleshooting this, here's the next step I'd take:
1) Instead of connecting the projector, connect to a VGA monitor. Usually, VGA monitors have a bit more range in supported resolutions. If you can get a picture on the monitor, you are on the right track. You can fiddle with the resolution to get something compatible.
One thing that's important to remember is that converting HDMI to VGA is a signal-conversion process. HDMI is digital and VGA is analog. Converting from one to the other is not a simple physical thing like using a gender-changer, coupler, or y-adapter. The signal needs to be processed and converted. There is no such thing as a passive (i.e. unpowered) signal converter. Just because you can get a physical adapter that allows you to connect one to the other is most often NOT sufficient. Some laptops that have only HDMI also put out an analog signal on some of the HDMI pins. This is to be used in conjunction with a passive HDMI -> VGA adapter. Remember that this only works because the device has been built to support a passive adapter. To my knowledge, the Prime does not fall into this category.
Hello everybody!
I an an Android app developer and I would like to attach my Galaxy Nexus to a projector (with VGA input unfortunately) in order to present my applications to other people when they are many. In this case I don't want to just start a presentation or show images, but I want the projector to reproduce what the screen is actually showing.
Is this possible? If yes, how?
I've seen that in USA it is possible to buy a micro-usb to VGA adapter that works with Galaxy Nexus, but it is not clear to me whether I'm able to see the screen or only media files. I think that a special app is needed to show the screen, do anyone know which one?
I would look at getting a projector with an HDMI, that way you can hook up and HDMI and I am not 100% sure, may want to search online, but I believe it has mirror mode doesn't it!
Sent from my DROID3 using Tapatalk
VGA is analog and HDMI is digital, to convert between one another you'll need to find a unit that looks like a small box and requires power. Don't be fooled by cables that have HDMI on one end and VGA on the other, these are for desktops that support sending VGA over HDMI which isn't common.
Assuming it has no HDMI port, does it have a DVI port. DVI is just the digital video carrier of HDMI so a cheap pin converter cable will work.
Anyone having issue with the original samsung galaxy s3 EPL-3FHU MHL to HDMI outputing in 1080p at 24Hz.
I currently have a 60" 1080P LCD and a 47" 1080P LCD, when connected with the MHL to HDMI, it will only output to [email protected] which play video fine,
but game or menu have that lag/choppy look to it.
I did try it on a buddy 32" 720P LCD and the MHL output it to 720p @60Hz which display game without the choppiness.
Also test it on a 24" 1080P PC Monitor and MHL output 720p to it. Is there any way to change the MHL configuration so that it will output 720p @60Hz onto my big screen 60" and 47" or even a different Adaptor that will only do 720p.
I heard you can use a samsung galaxy s2 MHL with a 5 to 11 pin adapter, anyone have this combination to test what it output at on a 1080P LCD.
If that s2 MHL with adapter works, I will return this s3 MHL and go that route.
I can only get 1080i on all my devices, all my TVs / Monitors are capable of 1080p 60hz but there was no way of making the S3 output anything except 1080i seems it's quite buggy!!!
If it just could be more improved :S No possible settings on the phone, that sucks. I really wanted to choose the resolution myself. Samsung should work on this problem.1080i sucks on my tv, 720p is 1000 times better.
EDIT: Lolz, wtf?? Just tried to connect to my PC monitor, only get 576p, my monitor is 1680x1050p. And the best thing, no way to configurate the output signal :S
We need an app, or a point in the settings. Only then we can get the max out of our superphone.
And I never hard of that thing, that someone got a galaxys2 mhl connector working with a galaxys3.
What Hz or refresh rate are you guys getting with your 1080i, I have seen a picture of someone showing a 1080p @60Hz with a galaxy s2 MHL adapter. The S2 MHL adapter by itself won't work. You will need a samsung 5 to 11 pin adapter which connect in between the s3 phone and the s2 MHL.
guys, I actually didnt know it, but I have a 11-pin mhl-hdmi-adaptor, to be exactly, this one:
http://www.amazon.de/gp/product/B0080CXSOU/ref=oh_details_o01_s00_i00
But I cant connect more devices over the micro-usb slot. I thought that it is possible with this connector, cause it supports USB OTG and MHL at the same time, so what is up with this ****?
Wikipedia said:
11-pin MHL-USB Connector
The Samsung Galaxy S III uses a connector that is similar to the original 5-pin MHL-USB connector, but it uses 11-pins in order to achieve a few functional improvements over the 5-pin design.
It supports the use of USB and MHL simultaneously (note that the new Samsung 11-pin MHL-HDMI adapter also has a USB-OTG port).
Samsung’s Galaxy S III can power the MHL-HDMI adapter. Although this can theoretically also be done with the standard 5-pin micro-USB connector, the Galaxy S III's 11-pin connector is believed to be the first smartphone that supports this functionality.
Click to expand...
Click to collapse
So, wtf is up??
I have mhl for sgs 2 will it work with my sgs 3.
Sent from my GT-I9300 using xda premium
Amritttt said:
I have mhl for sgs 2 will it work with my sgs 3.
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Im afraid, it wont work.
You need the S3 MHL Or you can use S2 MHL with adapter.
Amritttt said:
I have mhl for sgs 2 will it work with my sgs 3.
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
You will need this 5 pin to 11 pin adapter for your s2 MHL adapter to work with the s3, search amazon for it,
"Original Samsung HDTV Adapter TIP (5 to 11 Pin Converter) EPL-FU10BEBSTD"
Does anyone found a solution for what was the initial question?
I'm having the same issue also using the original samsung galaxy s3 EPL-3FHU except that the display is limited to 30 Hz for me.
Maybe it will be fixed in jellybean.. doubt it very much though.
I am having the same issues ... I have a Vizio 1080p 240hz and I am getting choppy gameplay too. Very disappointing, considering that gaming was the sole reason I bought it =(
I wish Samsung with come up with a solution.
Does anyone know if you can buy these any cheaper than £25 ($50)?
Sent from my GT-I9300 using xda premium
AlexNC75 said:
I am having the same issues ... I have a Vizio 1080p 240hz and I am getting choppy gameplay too. Very disappointing, considering that gaming was the sole reason I bought it =(
I wish Samsung with come up with a solution.
Click to expand...
Click to collapse
i think they will fix it on galaxy note2 :silly::silly:
720p only
I have a whole different story going on...
With this aftermarket hdmi mhl adapter i only get 720p on tv, sound out of sync, flickering, display cutting in and out.
With same movie on droid charge via direct hdmi get 1080i on tv, perfect sync, all apps work flawless as usual.
This aftermarket adapter cant be that bad...?!
Any input?
UP
And..............only ma466 in the chargue electric not the ma999?, not sufficient foir chargue the battery the galaxy via MHL HDMI...
Is a joke?????
UP
no one more news or gadgets since?
I also have choppy output with my S3 MHL adaptor. I wonder if there's a way to force the refresh rate somehow?
Has anyone tried overclocking to boost the frame rate? I've had the same problem as everyone else when trying to watch 1080 video on a 46" 1080 TV, but it only skips once every second or two on random intervals. It's JUST enough skipping that you know something isn't right, but almost can't put your finger on it. I may try overclocking to boost it in the next few days. If I do I'll post back with results. For reference, I'm using an ATT GS3 rooted with the stock TW ROM.
I just get 1080I on my 1080P sony Led 55" and 1080I on my Dell 1080P monitor 24"
I rather get 720P than 1080I, but i cannot change it
Better but still an issue.
I just installed the Hyperdrive rom with the kernel that can overclock on my SCH-I535 S3 and tried the official 11 pin Samsung hdmi adapter and was getting 1080 at 30hz witch is better then before. Also my phone was syncing to 30hz. Before it was 1080 at 24hz and the phone was syncing to 60hz witch caused every thing to look extremely choppy. Now games are playable but still could be much better if we had 720 at 60hz.
I'm not sure what changed from the stock rom to Hyperdrive but it seems that the output can be changed some how.
Also I seen that the HTC One S has a kernel (ZeroMHL) that can force there hdmi output to 720 but I don't know if the same method could be applied here.
Edit:
It seems that ZeroMHL fixed the kernel by finding key words and changing the limitations. As a professional I'm a video game programmer but I'm going to try and see if I can modify kernel source to get 720 60hz. If I can do it ill post the kernel / source.
Another MHL question from me.
Does the XZU support 1080p output over MHL? I have a feeling before the KitKat update that it did. With KitKat update, when I plug in the MHL to my monitor, the monitor reports a 720p signal. There was another post where someone stated you can change the resolution settings but I don't seem to have that.
I use mine with mhl latest kk build and it's 1080p I don't know where you can change the resolution. The only thing that bothers me is that the mhl 1 standard that the zu uses only supports 30hz
Sent from my C6833 using xda app-developers app
Thanks for the info. I tried two MHL adapters on two different monitors and both report 720p though I know these monitors will support 1080p through HDMI as I get that resolution when plugging in a monitor. Maybe something weird with the HDCP handshake? I'll try on my HDTV when I get home. Hopefully I don't have to go questing for a different MHL adapter (had to go through three to find one that would charge my phone while using HDMI out).
I have one that it charges my phone directly from the TV but the TV has one hdmi with mhl built in. If you use one that you needs 5v from charger or USB you should try the I9100(S3) mhl dongle works perfectly with our zu
Sent from my C6833 using xda app-developers app
---------- Post added at 03:02 AM ---------- Previous post was at 03:00 AM ----------
My bad the I9100 is S2 the S3 mhl does not work it's a different dongle
Sent from my C6833 using xda app-developers app
Yes, same thing happens to me as well.
I bought this: http://www.ebay.com/itm/321336887491 and the output is 720p 60hz.
The image is blurry and it is very annoying
If I remember correctly same thing has happened both in 4.3 and in 4.4 (rooted locked bootloader)
Hi harisled, I haven't tried it on my HT setup yet but I think I know why it is not working (at least for me) on my computer monitors. I had forgotten that the MHL 1.0 spec only allows 1080p @ 30Hz until mr.joshuanice had mentioned it. The two monitors I tried it on initially are computer monitors so they probably don't support 1080p @ 30Hz. I'm guessing the HDCP handshake (or whatever it is called) reduced the resolution to 720p @ 60Hz which is supported by my monitor. However, this causes the monitor to upscale causing the image to be blurry (like you have experienced).
I will test it on my HT this weekend which should work (I remembered testing this out a while ago). The only thing that sucks is playing games @ 1080p. As some have experienced, playing PS Mobile games at 1080p resolution makes the game really sluggish (@ 720p is great). I remembered someone had show a screenshot of a menu which allowed you to change the resolution but it may have been a different Sony phone or a different ROM.
You are right, it did output 1080p 30hz on a tv
mr.joshuanice said:
I use mine with mhl latest kk build and it's 1080p I don't know where you can change the resolution. The only thing that bothers me is that the mhl 1 standard that the zu uses only supports 30hz
Sent from my C6833 using xda app-developers app
Click to expand...
Click to collapse
harisled said:
Yes, same thing happens to me as well.
I bought this: http://www.ebay.com/itm/321336887491 and the output is 720p 60hz.
The image is blurry and it is very annoying
If I remember correctly same thing has happened both in 4.3 and in 4.4 (rooted locked bootloader)
Click to expand...
Click to collapse
nOrbX187 said:
Hi harisled, I haven't tried it on my HT setup yet but I think I know why it is not working (at least for me) on my computer monitors. I had forgotten that the MHL 1.0 spec only allows 1080p @ 30Hz until mr.joshuanice had mentioned it. The two monitors I tried it on initially are computer monitors so they probably don't support 1080p @ 30Hz. I'm guessing the HDCP handshake (or whatever it is called) reduced the resolution to 720p @ 60Hz which is supported by my monitor. However, this causes the monitor to upscale causing the image to be blurry (like you have experienced).
I will test it on my HT this weekend which should work (I remembered testing this out a while ago). The only thing that sucks is playing games @ 1080p. As some have experienced, playing PS Mobile games at 1080p resolution makes the game really sluggish (@ 720p is great). I remembered someone had show a screenshot of a menu which allowed you to change the resolution but it may have been a different Sony phone or a different ROM.
Click to expand...
Click to collapse
You can enforce the output format by dialing *#*#7378423#*#* then navigate to Service tests -> TV-Out Test -> Video format. Note that "Video format" will only be modifiable when the MHL cable is plugged in.
fnf said:
You can enforce the output format by dialing *#*#7378423#*#* then navigate to Service tests -> TV-Out Test -> Video format. Note that "Video format" will only be modifiable when the MHL cable is plugged in.
Click to expand...
Click to collapse
I tried that on my PC monitor but, as expected, nothing changed since the monitor does not support 1080p 30hz
fnf said:
You can enforce the output format by dialing *#*#7378423#*#* then navigate to Service tests -> TV-Out Test -> Video format. Note that "Video format" will only be modifiable when the MHL cable is plugged in.
Click to expand...
Click to collapse
when i connect my zu to tv phone appear mhl connected but tv is black screen when open service menu
mhl is on
video fourmat N/A
HPD 1
TMDS off
what shall i do ???
please!!!!
I know this is old, but is there an option to save the MHL-Setting in the Service menu permanently? After each reboot, the screen resolution is scaled to the default settings again.
Everybody who has problems with screen resolution can simply set the resolution and fps in the service menu under "second screen" .. For that type *#*#7378423#*#* in the phone dialer
For me its not even switching to 1080p when I select it in the service menu. It says reconnect but then again its set to 720p. Xperia Z and Z2 only outputing 720p. Are they even capable of 1080p MHL?
Is it possible the MHL cable is just crap?
nurps said:
For me its not even switching to 1080p when I select it in the service menu. It says reconnect but then again its set to 720p. Xperia Z and Z2 only outputing 720p. Are they even capable of 1080p MHL?
Is it possible the MHL cable is just crap?
Click to expand...
Click to collapse
The Z Ultra has MHL 1.0 or most likely 2.0 since 2.0 requires 900mA and therefore an external power source is needed (which my cable has) while 1.0 only requires 500mA, which is provided through a regular USB/HDMI. Both 1.0 and 2.0 support uncompressed 1080p and Dolby 7.1. MHL 3.0 was released just a month before the Ultra hit the market, so it doesn't have 3.0, which supports 4K and some other stuff.
The Z2 and beyond have MHL 3.0, and yes, it could be your cable. Be sure that it's 3.0 for the Z2 and 1.0/2.0 for the Z.
I tried 2 MHL1.0 adapters before and the output was 720p only for my Sony Tablet Z4...
Luckily I found the MHL3.0 adapter last night and the the output become 1080P 60Hz for my projector now. Try to find the MHL 3.0 from Taobao or eBay.
Hi. Has anyone tried using a USB C-to-HDMI cable to connect Mate 10 to a monitor. How do you like it? Do apps scale well on monitor? Assuming you hooked up a bluetooth keyboard and mouse, have you tried editing a document? Thanks!
still waiting for my Mate 10! But one of the reasons for getting one is USB-C to HDMI. One thing I noted when sourcing a cable - if you use a "standard" cable you won't be able to stream Netflix/Amazon streaming due to lack of "HDCP" compliance. I got a cable that was compliant for a few euro more on Amazon. Just keep this in mind if you want to stream Netflix etc.
Does anyone know if this would work with a Surface Pro 4? The SP4 has a mini display port, so maybe with a mini display port adapter, we can connect Mate 10 to the SP4 and view desktop mode on the tablet. Would that work?
podgeandrodge said:
still waiting for my Mate 10! But one of the reasons for getting one is USB-C to HDMI. One thing I noted when sourcing a cable - if you use a "standard" cable you won't be able to stream Netflix/Amazon streaming due to lack of "HDCP" compliance. I got a cable that was compliant for a few euro more on Amazon. Just keep this in mind if you want to stream Netflix etc.
Click to expand...
Click to collapse
So how and where to buy a cable to bypass this restriction, I am trying to play xfinity app and it tells me there is a restriction OMG wth it becoming Apple this android
rjan22 said:
So how and where to buy a cable to bypass this restriction, I am trying to play xfinity app and it tells me there is a restriction OMG wth it becoming Apple this android
Click to expand...
Click to collapse
Well the cable I have purchased is the one linked below - which the manufacturer says (elsewhere) is the HDCP compliant one. I can't guarantee you that it will work though!
I am expecting my phone and this cable this week so will try out!
https://www.amazon.co.uk/gp/product/B06XS7T4GP
NOTE - this manufacturer also sells usb-c to hdmi cables that it says are NOT compliant. Only one above is one they say is compliant.
podgeandrodge said:
Well the cable I have purchased is the one linked below - which the manufacturer says (elsewhere) is the HDCP compliant one. I can't guarantee you that it will work though!
I am expecting my phone and this cable this week so will try out!
https://www.amazon.co.uk/gp/product/B06XS7T4GP
NOTE - this manufacturer also sells usb-c to hdmi cables that it says are NOT compliant. Only one above is one they say is compliant.
Click to expand...
Click to collapse
Thanks I'll look for it here in Amazon US, no problem returning so might as well try.
I tried it out briefly when I got the phone.
I used a type c to HDMI adapter, with a normal HDMI cable.
Some things I noticed:
I think this drained the battery more than anything else I've done with the phone (including gaming).
The phone was noticeable warm after the session.
My phone rebooted shortly after the desktop session. Like it crashed.
The phone states it's in reverse charge mode, like juice is also bring drained from the phone to the TV.
I couldn't get YouTube to work full screen without borders. Unless I was mirroring the phone screen (which means phone screen also remains on).
I've mixed feelings, it's early days I guess.
Ok, I am still waiting for the cable from Amazon but ended up purchasing an adaptor from Maplin.
Worked fine - as in outputted screen of phone (in phone or 'desktop' mode).
But I did notice that the screen resolution as outputted was far less than the resolution of the screen - I would have expected the 1080p display to mirror across to the TV.
It wasn't that it was bad, just blurry text and not crisp when looking at video. Whereas in the past, with a phone with an actual hdmi connection as opposed to usb-c, or indeed when outputting a media player with hdmi or casting using chromecast, the quality is perfect.
Perhaps I'm doing something wrong or perhaps the Maplin cable is not up to speed. Open to ideas.
podgeandrodge said:
Ok, I am still waiting for the cable from Amazon but ended up purchasing an adaptor from Maplin.
Worked fine - as in outputted screen of phone (in phone or 'desktop' mode).
But I did notice that the screen resolution as outputted was far less than the resolution of the screen - I would have expected the 1080p display to mirror across to the TV.
It wasn't that it was bad, just blurry text and not crisp when looking at video. Whereas in the past, with a phone with an actual hdmi connection as opposed to usb-c, or indeed when outputting a media player with hdmi or casting using chromecast, the quality is perfect.
Perhaps I'm doing something wrong or perhaps the Maplin cable is not up to speed. Open to ideas.
Click to expand...
Click to collapse
Interesting. Sounds like you are using Mate 10 Pro. Wonder if resolution is improved using Mate 10.
Jamdonut said:
I tried it out briefly when I got the phone.
I used a type c to HDMI adapter, with a normal HDMI cable.
Some things I noticed:
I think this drained the battery more than anything else I've done with the phone (including gaming).
The phone was noticeable warm after the session.
My phone rebooted shortly after the desktop session. Like it crashed.
The phone states it's in reverse charge mode, like juice is also bring drained from the phone to the TV.
I couldn't get YouTube to work full screen without borders. Unless I was mirroring the phone screen (which means phone screen also remains on).
I've mixed feelings, it's early days I guess.
Click to expand...
Click to collapse
I was wondering about the battery drainage. Some cables I've seen have an additional input for charger. Maybe that might help
mscion said:
Interesting. Sounds like you are using Mate 10 Pro. Wonder if resolution is improved using Mate 10.
Click to expand...
Click to collapse
No, normal Mate 10.
Other cable arrived and same situation. To clarify, it's fine, and perfectly watchable, just not crystal clear. It strikes me that this method seems like the usb-c to hdmi cable is simply mirroring the display of the phone rather than actually outputting the video file itself independently - as would happen with a HDMI connection as you used to get on some phones. Perhaps this is something to do with the issue.
podgeandrodge said:
No, normal Mate 10.
Other cable arrived and same situation. To clarify, it's fine, and perfectly watchable, just not crystal clear. It strikes me that this method seems like the usb-c to hdmi cable is simply mirroring the display of the phone rather than actually outputting the video file itself independently - as would happen with a HDMI connection as you used to get on some phones. Perhaps this is something to do with the issue.
Click to expand...
Click to collapse
......hope you post result of amazon cable! have a nice day!
It was amazon cable I referred to above. So same with maplin adaptor and amazon cable. Tried outputting a HD YouTube video but not much different. As I say, fine, but not as clear as would expect if you copied that file to a media player attached to a tv via hdmi
Hooked mine up with the Huawei supercharger and cable and it slowly drains the battery in desktop mode. Without charger it will suck down the battery fast. Benched with Antutu and got 175k on phone. In desktop on 30" monitor got 157k. Still faster than my Mate 9. My S8+ in Dex was just about worthless. Also with the M10 in desktop with wired mouse has zero lag. Bluetooth mouse a different story. So gaming is pretty good on a monitor.
Ok, I "solved" my problem by fluke. I would love if someone more techy than me could explain but this is what I did to fix the fact that the HDMI output looked more like 640x480 than a hi def picture.
Went to TV settings, and selected advanced, HDMI settings, and Changed HDMI "Auto" mode to HDMI Graphic mode (choice of Graphic/Video - video was default and was crap). As soon as I did this I had perfect outputted photos and videos.
According to one tv manual I found on a search:
"Graphic: HDMI input timing set to Graphic mode (PC) - The image is full scan.
Video: HDMI input timing set to Video mode. The image is over scan."
According to someone on a completely unrelated PS4 forum:
"Basically by changing the HDMI mode to graphic, the HDMI output (be it gaming console, pc, or cable) bypasses "extra" processing features of the TV that
make the game and TV broadcasts look crappy and also causes lag. By bypassing those features you will get a much clearer picture."
Either way, it's fixed. On my tv. And on a shop tv the same issue. So given that I've connected previous phones with hdmi connections a few years ago without issues, this suggests that it is something to do with how the Mate 10 outputs signals in a way that TV recognises?
Love to hear an explanation from the experts. Thanks.
Edit: someone else with a similar issue on another device - so it seems the issue is that the Mate 10 is not recognised by most Televisions as a "PC" which would correct hdmi mode to "graphics" ?
"When I switch between the Blu-Ray and the PC on two separate HDMI inputs, the TV doesn't detect that's it's connected to a PC, so it doesn't switch from video to graphics mode - which is required for it to look good as a computer monitor.
Since the TV deosn't recognize the PC and auto switch to graphics mode, when I switch from Blu-Ray to PC, I have to dig down into the menu and switch the HDMI mode to graphics manually - and then back when I go to the Blu-Ray. -- Major pain if I'm switching back and forth."
Any ideas? Is this something Huawei could fix in firmware?
podgeandrodge said:
Any ideas? Is this something Huawei could fix in firmware?
Click to expand...
Click to collapse
It looks like its related to the TV resolution : I have the same issue (640*480 resolution) when I connect the mate 10 pro to a 4K native TV but it works perfect when connected to a full HD TV !! It's a shame as 4K tend to be the standard display, so I guess Huawei should fix it whith a firmware update. Any other solution (HDMI 2.0 cable maybe??) ?