How to connect an HDMI monitor?

[Member Andy3142]

I’m new to linux. I’ve got an external HDMI monitor connected to my HDMI port, but it’s dead in arandr. (it’s switched on!) How do I access it please??

xrandr –auto doesn’t do anything and xrandr –query says

VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS-1 connected primary 1366×768+0+0 (normal left inverted right x axis y axis)

Many thanks
Andy

Attachments:

1. Full_info_1.txt

[Member ModdIt]

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HiAndy* not dead in xrandr, disconnected, means the hdmi port is inactive.

xrandr --query output was  HDMI-1 disconnected (normal left inverted right x axis y axis)
Please try    
xrandr --output HDMI-1    The external monitor should be connected when you boot.

You will probably have to unmute sound to HDMI in alsamixer and set a reasonable level.
use left and right arrow to move between channels or devices, M key will toggle mute unmute.
Please be careful with pre amo level, set it low, about 18 at first, you can go higher later.

Have no device details, some need BIOS settings or have specific keys to switch output to external.

Should you have no handbook a search for device name then manual should be successful.
Whenever possible I have a copy of user manual and service manual kept localy.

[Member Andy3142]

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Hi @moddit, this alas doesn’t work. Any further ideas please? I’m searching “dual monitor debian” and things like that but so far there’s not much and it’s way over my head.

[Moderator BobC]

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Connect and turn the HDMI monitor before you boot.

After you boot use Arandr to make it active.

Try Forum >> Search with HDMI randr to see previous threads

look at this one: https://www.antixforum.com/forums/topic/monitor-display-configuration/

[Moderator BobC]

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BTW, when you make it active, you might also need to rearrange the layout, etc. Once you have it all the way you want it, you need to save the layout to ~/.screenlayout/default.sh

[Moderator caprea]

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Graphics:  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics vendor: Dell 
           driver: i915 v: kernel bus-ID: 00:02.0 chip-ID: 8086:0116 class-ID: 0300 
           Device-2: NVIDIA GF108M [GeForce GT 525M] vendor: Dell driver: N/A alternate: nouveau 
           bus-ID: 01:00.0 chip-ID: 10de:0df5 class-ID: 0300 
           Device-3: Quanta type: USB driver: uvcvideo bus-ID: 1-1.4:3 chip-ID: 0408:2fb1 
           class-ID: 0e02 
           Device-4: N/A type: USB driver: hid-generic,snd-usb-audio,usbhid,uvcvideo 
           bus-ID: 2-1.2.3:6 chip-ID: 534d:2109 class-ID: 0300 
           Device-5: Logitech C922 Pro Stream Webcam type: USB driver: snd-usb-audio,uvcvideo 
           bus-ID: 2-1.2.4:7 chip-ID: 046d:085c class-ID: 0102 serial: <filter> 
           Display: x11 server: X.Org 1.20.4 driver: loaded: modesetting unloaded: fbdev,vesa 
           display-ID: :0.0 screens: 1 
           Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.2x8.0") 
           s-diag: 414mm (16.3") 
           Monitor-1: LVDS-1 res: 1366x768 hz: 60 dpi: 101 size: 344x194mm (13.5x7.6") 
           diag: 395mm (15.5") 
           OpenGL: renderer: Mesa DRI Intel Sandybridge Mobile x86/MMX/SSE2 v: 3.3 Mesa 18.3.6 
           compat-v: 3.0 direct render: Yes 

According to the inxi output this is a hybrid graphic laptop.I don’t have any experience with hybrid graphic, i hope BobC has.
Are both cards enabled in the Bios? Might the Hdmi port belongs to the nvidia card.
Please post
xrandr --listproviders

[Moderator BobC]

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Yes, 3 of my laptops have optimus/intel/nvidia video with HDMI, and I sometimes hook a 44″ screen to the laptop via HDMI. The others are all normal video, but some have HDMI as well.

The issue I mentioned above was the problem I was having.

[Member Andy3142]

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@caprea,here is xrandr –listproviders
Providers: number : 1
Provider 0: id: 0x45 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 4 associated providers: 0 name:modesetting

dmidecode is attached.

I looked inside the BIOS and I couldn’t see anything relevant. There is one reference to VGA, no other reference to graphics or graphics cards, no reference to HDMI, and everything is enabled.

Attachments:

1. dmidecode.txt

[Moderator BobC]

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Did you look at my suggestion above?

Did you make sure the HDMI cable and screen were connected and on before booting? If not, do that.

Then run and post the results froma terminal when you of run:
xrandr

• This reply was modified 1 year ago by BobC.

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