Setting two screens via HDMI on ZorinOS Core

Hardware Support
1

Hi,

Just installed ZorinOS Core and tried to setup two monitors via HDMI cable *(one connected to the motherboard, another to the graphics card), but the one on the motherboard is not detected by the OS.

I had the same problem about a year ago on an older PC, but resolved that via resources found on this forum.

But now nothing works - Windows10 on the same device detects the monitors correctly - but ZorinOS does not.

What am I missing on the new PC?

root@BEAST:/home/stefan# xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00*+  50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x800      60.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  

root@BEAST:/home/stefan# get-edid
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
No EDID on bus 1
No EDID on bus 2
No EDID on bus 3
No EDID on bus 4
No EDID on bus 6
2 potential busses found: 0 5
Will scan through until the first EDID is found.
Pass a bus number as an option to this program to go only for that one.
Bus 0 doesn't really have an EDID...
256-byte EDID successfully retrieved from i2c bus 5
�������$��5x*��UO�&PT���������@��:�q8-@X,E(!�GVEL5HA098301�24P1W1
      �2LS
      ��K#	�e
                  �
Њ �->�(!rQ� n(U(!�
Њ �->�(!�
Looks like i2c was successful. Have a good day.
А @1

Any support is appreciated.

2

Some HDMI cables are uni-directional. Try flipping the cable.

3

Yes, already tried that.

On the ZorinOS installation screen, the monitor worked fine via motherboard HDMI port, but after installation, only the one on the graphics card is working..

4

Can you please post the output of

sudo lshw -C video

5

Also post the output of:
xrandr

6 
stefan@BEAST:~$ sudo lshw -C video
[sudo] password for stefan:           
  *-display                 
       description: VGA compatible controller
       product: Advanced Micro Devices, Inc. [AMD/ATI]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:0b:00.0
       version: c7
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=amdgpu latency=0
       resources: irq:65 memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:e000(size=256) memory:fca00000-fcafffff memory:c0000-dffff
7 
stefan@BEAST:~$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00*+  50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x800      60.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08 ```
8

Do you, by any chance, have SecureBoot enabled?

mokutil --sb-state

9

Currently no

stefan@BEAST:~$ mokutil --sb-state
SecureBoot disabled
Platform is in Setup Mode
10

Ok, that removes one avenue by which the video driver wouldn't work... researching.

Please post the output of:
uname -a

and:
apt list --installed | grep -i amdgpu

1 Like
11

This is the dedicated card? The integrated graphics are Intel, correct?
This is a first. I have never seen the intel integrated graphics just utterly not detected. What a strange one...

12 
stefan@BEAST:~$ uname -a
Linux BEAST 5.15.0-67-generic #74~20.04.1-Ubuntu SMP Wed Feb 22 14:52:34 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

stefan@BEAST:~$ apt list --installed | grep -i amdgpu

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libdrm-amdgpu1/focal-updates,focal-security,now 2.4.107-8ubuntu1~20.04.2 amd64 [installed,automatic]
libdrm-amdgpu1/focal-updates,focal-security,now 2.4.107-8ubuntu1~20.04.2 i386 [installed,automatic]
xserver-xorg-video-amdgpu/focal-updates,now 19.1.0-1ubuntu0.1 amd64 [installed,automatic]
13

Could this be causing a conflict? I have pretty much the same setup as you (just with a wimpier AMD GPU which somehow, impossibly, has the ability to connect 4 monitors (which it'd never be able to run all at once)... the eDP built-in display, two DisplayPorts, one HDMI port), and I don't have that package.

Here's mine:

sudo apt list --installed | grep -i amdgpu
libdrm-amdgpu1/focal-updates,focal-security,now 2.4.107-8ubuntu1~20.04.2 amd64 [installed,automatic]
xserver-xorg-video-amdgpu/focal-updates,now 19.1.0-1ubuntu0.1 amd64 [installed,automatic]
14

@pejcha1994 , is your architecture 32 bit?

15

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