HDMI: external monitor is not detected

User Support Hardware Issues
1

Hey folks,

I am using a

  • TUXEDO Pulse 14 (AMD Ryzen 7 4800H, Radeon RX Vega, integrated graphics)
  • with Qubes-R4.0.4-x86_64
    and already found some solutions for several problems.

There are still two things on my list which are maybe connected.
It is not possible to reduce the brightness of the build in monitor. I found a topic for that (not resolved so far):
https://forum.qubes-os.org/t/gpu-driver-necessary-for-functional-backlight-control/3544/

The issue for this topic: After connecting several different external monitor with several suitable cables via HDMI the monitor is not detected.
Using other distros this setup works => hardware is OK.

Output of xrandr -q

[x3@dom0 Documents]$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected 1920x1080+0+0 0mm x 0mm
   1920x1080     77.00*

$ lspci -k
    00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1630
    	Subsystem: Device 1d05:109f
    00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Device 1631
    	Subsystem: Device 1d05:109f
    00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1632
    00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1634
    	Kernel driver in use: pcieport
    00:01.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1634
    	Kernel driver in use: pcieport
    00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1632
    00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1634
    	Kernel driver in use: pcieport
    00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1632
    00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1635
    	Kernel driver in use: pcieport
    00:08.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1635
    	Kernel driver in use: pcieport
    00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 51)
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: piix4_smbus
    	Kernel modules: i2c_piix4, sp5100_tco
    00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
    	Subsystem: Device 1d05:109f
    00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1448
    00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 1449
    00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144a
    00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144b
    	Kernel driver in use: k10temp
    	Kernel modules: k10temp
    00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144c
    00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144d
    00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144e
    00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 144f
    01:00.0 Network controller: Intel Corporation Device 2723 (rev 1a)
    	Subsystem: Intel Corporation Device 0084
    	Kernel driver in use: pciback
    	Kernel modules: iwlwifi
    02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: pciback
    	Kernel modules: r8169
    03:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a808
    	Subsystem: Samsung Electronics Co Ltd Device a801
    	Kernel driver in use: nvme
    	Kernel modules: nvme
    04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 1636 (rev c6)
    	Subsystem: Device 1d05:109f
    	Kernel modules: amdgpu
    04:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 1637
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: snd_hda_intel
    	Kernel modules: snd_hda_intel
    04:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Device 15df
    	Subsystem: Device 1d05:109f
    04:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 1639
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: pciback
    	Kernel modules: xhci_pci
    04:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 1639
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: pciback
    	Kernel modules: xhci_pci
    04:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] Device 15e2 (rev 01)
    	Subsystem: Device 1d05:109f
    	Kernel modules: snd_pci_acp3x
    04:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Device 15e3
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: snd_hda_intel
    	Kernel modules: snd_hda_intel
    05:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 81)
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: ahci
    05:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 81)
    	Subsystem: Device 1d05:109f
    	Kernel driver in use: ahci

Also tried to use the xfce system tool “Display” (configure new displays when connected) without success.

Do you have an idea how to get the external monitor working via HDMI?
If you need more information / logs, please let me know.

Thanks in advance!

Xorg.0.log (26.1 KB)

2

My HDMI Output is not working also.
But my MiniDP is working without problem.
Why? I do not know.

3

Can you show dom0 X logs and lspci -k please

4

@billystonka
I added the missing information in the original post.
Sorry for not providing earlier…

5

@devnull had to add some markdown formatting to your post as it had too much text. I’ve also replaced the Xorg.0.log text dump with an uploaded .log file. You can do the same in the future.

Xorg.0.log (26.1 KB)

6

@deeplow Thanks for your work, will use files in the future.
I am very excited about the polite way people interact in the forum.
Good to be here.

1 Like