P377SM-A with 1070N, Need help; screen not recognized

So i install a msi 1070N in my p377sma. First, it is recognized as "unknow" in bios. ( PremaMod bios)
Then during installation ( .inf mod), after i accept installing this unknow driver, the screen became black. i wait 10mn to be sure driver is installing even with this black screen. i reboot, gpu still as unknow in bios, i can see my screen but once i reach the new windows logo, the screen start to flicker some weird color ( green arround corner ) for a second then it become black. i boot windows with my fingerprint. I install with my hdmi a projector and i can see my desktop. But in nvidia or windows display setting, my internal screen is not detected. Is it a conflict because i am not sure i am uefi 100% or something else?? Thanks for all advise. Gonna test now the gpu to see if it clock well during game

My screen is a auo 4k edp connected running at 4.85-5.12v
my hdmi screen is a benq w710st projector

Thanks for any help!

 

Benchmarking good, gaming gta5 perfect....just my screen not recognized. i have to travel soon so i dont have time to test my 120Hz edp screen. Someone has an idea why this screen doesnt want to work?

with an original edp 120hz lg screen where hotkey worls, its working..

with 4k mod screen( hotkey brightness not working), it boot but once reaching windows boot logo, blackscreen (i can use an external screen)
Something in this gpu doesnt want to start up with my 4k mod screen.

well.. i remembered its was working before i instal any .inf mod driver. But latency was very slow.

 

You might want to get into ouch with @Prema. Might some handshake thing going on. Does the laptop have Optimus/iGPU?
Or only the dGPU.?

 

only Dgpu.
Something weird....i uninstal only nvidia driver, restart and the screen work but disgusting, like 30hz and not well color.. i check display setting and the screen is at 64Hz..... thats why it is weird maybe... how to downclock it?? i cant even with CRU i doesnt change anything. i cant try with nvidia because once driver installed, display not recognized.

 

Try making an export of all non-dummy panel edids with MonInfo.

Something's not right; 64 Hz would never turn up as an 'official' value, so the drivers appear to be confused. You may need to clean up the registry in order to fix this; navigate to 'HKLM\SYSTEM\CurrentControlSet\Enum\DISPLAY\' and check the data and/or export the lot.

 

The BIOS name string is a simple detection that puts text in that box, it has no other impact other than that so don't worry about that.

 

Thanks for info. as i just leave, cannot test it during this week
But how can i know if this gpu is not with an gsync vbios? is there a way to see it.

Because even with black screen and driver installed. if i shutdown and switch with 120hz edp, working.
So i dont know if its a bad driver mod...but it cant be that bcse i still dont understand why my system will detect without nvidia driver my screen at 64hz... Best way to know is someone with this same panel, same gpu and look in windows if display is also clocked at 64hz. i dont know if i can try a non gsync vbios.

 

Have you tried creating a "custom" profile with 60hz for the internal panel to see if it is the problem? 64hz is about as good as any B173ZAN01.0 I've heard of. Mine (label on the back says HW V2) tops at 63 but when it warms up I get graphic corruption, 64hz causes instant black screen. Even at default 60hz I get corruption on Chrome sometimes with certain pages and certain tables at certain zoom factors, the worst is actually NBR and some of the EVOC / HID graphics in some users' sigs! Extremely wierd. I can run the same pages on FF with no issue.

Also, my panel shows as Gsync capable in the control panel, have set it and haven't noticed any tearing so have to assume it's working.

edit: I have no brightness control though, I tried all the regedit key hacks with no success. It's stuck at full bright so it's all good

 

64Hz is because of the EDP bandwith limit at 4k.

 

I have a different question...

exactly how did you get a 1070N to fit in this machine? Did you find a MXM-B variant of a GTX 1070? And what 4K panel did you put in the machine, and how did you make it fit? As far as I know the lid dimensions and screw mounting orientation are all completely different, and there is no possible way you could fit a GTX 1070N into either slot.

I'm certain you'll need the vBIOS modified and likely a sBIOS mod as well to get the GPU up and running better.

 

The MXM format is the same AFAIK. Only the card layout and form has changed depending on the brand.

 

so how you fit the 1070 into the laptop???
temps??
throttling?

 

As far as I can tell, the heatsinks won't fit. The Zotac card is indeed MXM, though. It'll physically fit on the board, but still I feel something on the card will not be properly set.

It's a bad shot, but look at the heatsink and primary (right side) MXM GPU here.
Then look at the Zotac 1070N here. The row of components below the VRMs at the top of the card should cut into the edge of the heatsink, I think. That's just my rough estimate.

Maybe if you cut the edges with a dremel, but that'd require rather precise engineering, and then the edges may not be designed to pull heat from properly (as you will need to thermal pad them). Hence I want to know, how did he fit a 1070N in there? And I don't think it will cool very well either. Pascal is most certainly hotter than Kepler and Fermi; even a stock 1070N should be rather near thermal throttle unless in a rather cool environment with the laptop propped up; potentially cooling-modded as well.

 

Yeah, the heatsinks do need quite a bit of modding depending on the system. The 980M heatsink perfectly works with the MSI 1070N in the P870DM1 though.

 

Yeah. I have 980M heatsinks for my P370SM though, and they even need cutting for 980Ms to fit properly. 1070N is a flat no-go for this thing, as far as I can tell.

Hence, why I really want to know what he did, and how he got a 4K panel in the machine. Different eDP cable, different lid size, different screw mounting orientation (and number of screws), I don't understand this. It's like he isn't talking about a P37xSMx model

 

For the 4k panel he had to splice up a cable. That much know. I think he made a thread about it as well.

 

i wonder if that bypass wire is the reason why it works for me?

 

Yeah, I know modding the eDP cable can work. But the fit and everything... I'm amazed it has enough bandwidth for 4K 64Hz, since the current eDP models are one revision higher and should have more bandwidth. *shrugs*. Then again this is 50-pin vs 30-pin. Oh well.

I'd like to see pictures and varying other evidence to this is all.

Edit: seems he got a custom cable created and used tape instead of screwing it in, and needs to run it under 50% brightness to prevent burning the screen from overvoltage or something to that effect. Eh, not for me.

 

Doubt it.
If the EC was the issue, then it wouldn't even work with an external monitor.
It's probably something related to the mods he had to do to get the 4k panel working . Since the other panel works fine.

 

I ask the sellor ( it is hard with english traduction from chinese...) i guess he told me this gpu is gsync possible. he says if laptop is gsync it work gsync, if no, not.
So this Vbios is a gsync one right??

My screen is Auo b173zan01.0
i remembered with both 980m max 64Hz but i cant use any software to mod Hz bcse no nvidia driver is installed.

Because i am saying...why with a 120hz edpscreen it doesnt bug, but with a 60hz edp it does. If gpu detect a 120hz screen, it disable gsync?

some pictures of mod:
temp are perfect....gaming at 1080p ultra, core is not even at 100% use.. i have 62*c with grizzly paste. Sorry for bad quality... had to convert size.

i post a thread somewhere how i install this 4k in this model. we are 2 having done it
i mod the frame, the barebone, and the cable

i run brightness 100%. and still at 5v its been more thzn 5months now. still perfect

wich laptop do u have? its weird u screen bug like that even at 60Hz... me its perfect, max oc was 64 but more it was flickering. i want to understand why it put automaticly at 64hz...i hope its a corruption due of a gsync vbios..

 

Ok, well done. I see one of the MSI cards can fit due to no upper protrusion; I had thought it might not have. It looks also like you could SLI 1070s in this with two power adapters, because there is a spot for a SLI cable.

I guess all you need now is a fix. Personally I'd have modded in the Chi Mei 1080p 120Hz panel to fit the way you did the 4K and seen if 1070 SLI could work and be cooled, and ran with that.

 

ues i plan to sli it, i will cut for the second gpu a bit in the hdd space.
For first gpu, i had to cut a barebone part from cpu fan

well i have a lg 120hz display and it is working perfectly. i didnt put a picture because as i was leaving and didnt have time to test it deeply.. but i was just curious if it gonna work. So for now, its working with hdmi, edp 120hz screen. LVDS screen will not work ( reported from another chinese forum ).
Need to find a fix to make this functional with auo 4k panel
i praise my gpu is gsync so i will just need to instal a non gsync vbios^^

 

That 120hz gaming goodness though...

 

yeaa.. but once i saw uhd screen...cant come back to 1080p x) i think best option is "3k" 120hz ( b173qtn01.0) BUT i first need help to find a solution to make available modded screen with 1070N...maybe as it is 120hz, it gonna work... so this means it was a gsync issue.


To anyone with a gsync laptop, if by the way one day u will upgrade nvidia driver, can someone show me the value of his screen Hz without any nvidia driver installed? so i can see if value will be 60hz-64hz or 75Hz.

 

The 4k panel will not go over 64hz, because of the eDP bandwidth being at its limits.

 

That and the display controllers themselves pumping all those pixels, they have to cope with 4x the workload for every Hz over 60 compared to 1080p panels.

 

wow so I could put a 1070m in my p377sm-a with very little modding?

 

If you have an 120Hz edp screen yes. But i will give more info and test later. we need to see if it still run in a long period without crash.

 

The problem likely has nothing to do with gsync, and if it did, the B173QTN01.0 is also a gsync panel like the B173ZAN01.0 you're currently using.

The problem you're encountering is that the 1070N likely needs some modding of its EC to properly display things for you. A vBIOS update, and possibly system BIOS update, would be required. That's what my guess is. To this respect, you'd need to get Prema to do one or both for you, however he seems to be busy with his current-gen system mods. @Prema any thoughts on this?

 

What brand GPU and what vBIOS/BIOS/EC revision is on that thing now?

 

Thanks for you reply Prema,
well the gpu is a 1070N from MSI with an SLI port, i baught it on taobao( i guess the sellor told me that it was in a msi machine who support gsync)
the vbios version is 86.04.10.00.17
Device id: 10de-1ba1

The bios and ec of my p377sma is your last bios on your website.

i see but then why its working on old edp screen and not this auo? if it was an ec problem, even the lg screen shouldnt work right?

 

Well maybe, maybe not. It could be that the bios not having the AUO screen in it is the problem?

Sent from my A0001 using Tapatalk

 

well it this screen was working perfectly with 980m sli.
Its working weirdly with this 1070n without driver, and with driver, black screen and not detected by hwinfo. But during booting it seem to look fine till windows os start. I am talking with Prema he will help me

 

Yes, it's probably the EC. 900M series is BIOS supported by the latest mod; 1070N is not. The fact that windows needs to load a driver AND you need an unsupported screen as far as your notebook BIOS is concerned (you say it worked with your 120Hz, yes?) suggests it's a problem along those lines. You showed it works on an external projector with the drivers, no?

Sent from my A0001 using Tapatalk

 

yes its working with my lg 120hz ( an " official panel supported by bios") and a projector in hdmi was a picture i uploaded.

 

Yeah then it's probably that being the issue. You need mods is all.

 

Remember that modern cards have dropped LVDS support so only eDP will work.

 

It's both eDP, he is using the B173ZAN01.0 that the 17" clevo models do, with a custom modded cable

Sent from my A0001 using Tapatalk

 

Some update:

I receive the help of prema for a vbios, but it is still not working hoplessly but i guess he gave me a non gsync vbios so its still nice for my laptop to avoid conflict lately.
Something i discover while switcging from lg ( lp173wf2) and auo ( b173zan01.0),
both display without driver are running at 64hz and have the same weird issue without driver ( latency, but i notice in the auo display even some color issue at close look..might be the cause of 64hz)

Between lg and auo edp cable, only one cable from lg cable wasnt connected with the auo display, it a pin named NC..as there are 3 NC pin from auo display... i dont know were to connect it. so i disconnect it from my lg cable and the lg display still work as original, so i dont know the utility of this pin.. in schematic of p377sma panels,, its C49 and C48.

@Mr. Fox , If you have some free time, do you have an idea if it is linked to a .inf mod driver not well done?
my subid sys is: PCI\VEN_10DE&DEV_1BA1&SUBSYS_03761558&REV_A1\4&270CD41B&0&0008
i tried by installing this line in nvcvi. it is working with my lg screen. Blackscreen during driver installation with auo display

Is it normal that in bios my gpu is recognized as "unknow" ?
So i still have no idea why it doesnt work with auo display? Is it because i am not in uefi? i still wasnt with my 980m sli.
or still a gsync error, or maybe because this gpu want an official compatible panel inserted..

 

I answered the question about the BIOS identification already

 

The 'C's simply stands for 'capacitor' in the schematics, their purported purpose is 'DP_DCLK(#)'. Either it is the 4th lane or it is the auxiliary channel. Follow the cable and trace them back to the pins of the LG, then you'll know for certain and also where it has to wind up on the AUO. Also point out the pin numbers of the NCs on the AUO:

Spoiler: B173ZAN01.0 - pin configuration

Spoiler: LP173WF2-TPB2 - pin configuration

Which WF2 is this, btw? There's at least four versions and the TPB1 disagrees with the others regarding the pin designations. Probably an error, but just in case ...

 

i have tpb1 but yes it is pin 50 which i just unplug it and still work...well then it is just a 2d-3d switcher.. a bit useless i guess^^

 

i ordered an AUO b173qtn01.0 ( 120hz 1440p) to test it.

 

Not working too...even if its 120hz.. what can be wrong :s

 

What is your LG 120hz screen type of ? What strings does it have or model number?
Will the MSI GTX 1070 work on stock P377SM-A screen ?
I don't care about, replacing it.

 

Only eDP - e.g. LG LP173WF2 (TP)(B2).
I can sell you proper cable.

 

So I should also upgrade screen to this LG ?

 

Yes. Or you can search for other eDP screens used in Clevos with 50-pin connector.

 

If it came specced with a 120Hz/3D (LG) panel you will not need to upgrade since that is already eDP. If you just have a standard 1080p60 (Chimei or Phillips) panel, your panel is LVDS, and you will get no internal display since pascal dropped LVDS support (look in my thread, link in sig, you can see the workarounds I had to do). I have a LP173WF2TPB1 in transit and a eDP cable from P170HM3 which is pin compatible and according to CEG being a little longer than P370EM3 cable (which they were OOS of) should work fine.

 

Is this laptop same as the p377sm without an ''a'' or ''-a''