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RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,780
Message 1 of 290

Lenovo P50 - HDMI not working

Hi,

 

I just got my new Lenovo P50 a few days ago, and so far it was a great experience.

The only thing that doesn't work is the HDMI connector. I understand the HDML is connected directly to the NVIDIA GPU. I assumed it will work when setting the BIOS to discrete graphics, but that didn't help as well.

Steps I took  (The HDMI cable is, of course, connected, and "Project" settings (Fn F7 or Windows-P) is set to "extend")

1) Update NVIDIA drivers

2) Use NVIDIA drivers recommended by lenovo

3) Reduce resolution to HD and Full HD (the projector I am connecting supports both resolutions)

4) many many restarts Smiley Happy

 

I have noticed another thing - In the BIOS there is a way to configue the device to which the boot screen will be sent to. The options are "ThinkPad Display", "DisplayPort" and "Display On Dock". But the documentation on the right side is also saying there SHOULD be an Option "HDMI". Which is not there.

 

When looking into the NVIDIA native system information, it shows 1 native output (the laptop's screen) which is "connected". Other than that ttere are 3 (!) display ports, all 3 not connected (thou the projector is on, and the cable is connected). To me it seems like the HDMI port is disabled, but I can't find any way to enable it!

 

Any help will be appreciated.

 

 

yipcw
Token Ring
Posts: 77
Registered: ‎05-20-2011
Location: US
Views: 124,555
Message 2 of 290

Re: Lenovo P50 - HDMI not working

RaananW wrote:

The only thing that doesn't work is the HDMI connector. I understand the HDML is connected directly to the NVIDIA GPU. I assumed it will work when setting the BIOS to discrete graphics, but that didn't help as well.

Steps I took  (The HDMI cable is, of course, connected, and "Project" settings (Fn F7 or Windows-P) is set to "extend")

1) Update NVIDIA drivers

2) Use NVIDIA drivers recommended by lenovo

3) Reduce resolution to HD and Full HD (the projector I am connecting supports both resolutions)

4) many many restarts Smiley Happy

 

 

When looking into the NVIDIA native system information, it shows 1 native output (the laptop's screen) which is "connected". Other than that ttere are 3 (!) display ports, all 3 not connected (thou the projector is on, and the cable is connected). To me it seems like the HDMI port is disabled, but I can't find any way to enable it!

 

 


 

don't know about HDMI port, i have seen similar problem with the miniDisplayPort->HDMI display.

 

i got it work in mirror mode (1920x1080) once when i first connect a monitor.

 

the next time i connect, somehow it thinks there are 2 displays mirrored to the internal P530 graphics, but limited to 1280x720, cannot change that.  the external display (connected to the M2000) shows nothing.

 

windows resolution, intel graphics control panel, nvidia control panel, none can fix it.

 

the only way i got it to work is switch to extended, the internal shows 4K option again and the external works as is.

 

if you look at the audio, it is kind of wonky also, sometimes it will say all 3 digital output are disconnected.  i have to reboot, then the mDP-HDMI audio works again, show #1 is connected.

 

i think the driver is just buggy like the previous intel+nvidia configurations.

 

also got some problem with Adobe Photoshop, can't get it to use auto GPU (Ps just disable it) or discreet, it keeps switch back to integrated, once that got selected, nvidia control panel won't change to anything else.

 

and some benchmarks, it just bombed

my running test note at

 

http://users.wfu.edu/yipcw/lenovo/2016/p50/

 

 

 

 

 

RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,539
Message 3 of 290

Re: Lenovo P50 - HDMI not working

Wanted to add one more thing - 

The cable is working - I use it with a different computer and with a Rasp-PI - both detect the projector with no problem.

Another reason I believe the HDMI is deactivated is Audio - Windows usually detects the projector as an audio output device, but with the P50 (and windows 10) it doesn't.

yipcw
Token Ring
Posts: 77
Registered: ‎05-20-2011
Location: US
Views: 124,535
Message 4 of 290

Re: Lenovo P50 - HDMI not working


@RaananW wrote:

Wanted to add one more thing - 

The cable is working - I use it with a different computer and with a Rasp-PI - both detect the projector with no problem.

Another reason I believe the HDMI is deactivated is Audio - Windows usually detects the projector as an audio output device, but with the P50 (and windows 10) it doesn't.


haven't trued Windows 10, I only use the OEM Windows 7 it came with so far.

 

Have you tried to control it with NVIDIA control panel?  I got it to work there sometimes better than Windows native control.  I think the three (plus Intel) all try to control the hardware, but not exactly communicating properly.  Sometimes I can't Windows-P to switch mode, it has no effect, have to use NVIDIA (I suspect nvidia is not writing everything back to registry control set, so Windows doesn't know what is being changed) 

RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,528
Message 5 of 290

Re: Lenovo P50 - HDMI not working

The problem is that the projector is not even recognized by the NVIDIA card as connected. Nothing is shown, even in the nvidia control panel (there is a "setup multiple devices" section tat shows all connected devices.)

I am not able to check with any other display at the moment, but I can really say that the projector is working correctly. This is an issue with the P50. Either software or hardware, but something's wrong (Maybe with my setup, but I really tried everything I could)

RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,526
Message 6 of 290

Re: Lenovo P50 - HDMI not working

This is how the NVIDIA's control panel looks like - 

http://imgur.com/a/RgIJW

No HDMI, just 3 display ports.

helloguys
Token Ring
Posts: 131
Registered: ‎05-02-2009
Location: USA
Views: 124,437
Message 7 of 290

Re: Lenovo P50 - HDMI not working

@RaananW:

 

Try to load the BIOS default and see if it fixes the problem?

 

RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,410
Message 8 of 290

Re: Lenovo P50 - HDMI not working

Didn't work, but I will surely try again.

 

I tried today with a different screen. Result - HDMI is simply not working. Connecting the screen using the DP connector worked in a second (with hybrid mode in the bios). 

marceldek
What's DOS?
Posts: 1
Registered: ‎02-11-2016
Location: Netherlands
Views: 124,308
Message 9 of 290

Re: Lenovo P50 - HDMI not working

I just received my Lenovo P50. It is incredible that when you receive an new mega expensive laptop that not all ports are working!! HDMI come on. I can't even extend my display. Hope someone comes with a solution. Should be Lenovo!! Deliver a laptop that does not work out of the box.

RaananW
Paper Tape
Posts: 10
Registered: ‎02-07-2016
Location: Berlin, Germany
Views: 124,300
Message 10 of 290

Re: Lenovo P50 - HDMI not working

So I understand I am not the only one with this problem Smiley Happy

Would be great to know what lenovo has to say about this.

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