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No HDMI output on Bulseye

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rootoid
Posts: 1
Joined: 2022-06-28 17:43

No HDMI output on Bulseye

#1 Post by rootoid »

I have a Thinkpad X1 Extreme Gen 3 laptop and after installing Debian 11 (Bullseye) I noticed that I cannot output video by plugging in an external monitor on the HDMI port.

The monitor and cable are fine; I use them with a different laptop without issues.
I tried to manually configure the monitor to be used with KDE's "Display Configuration" program, but it does not show up.

Also, I did `xrandr --listmonitors` and saw that only the internal display is present in the output:

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Monitors: 1
 0: +*eDP-1 3840/344x2160/194+0+0  eDP-1
Doing `sudo journalctl -f` I noticed the following output:

- when plugging in the HDMI cable:

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Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper: RRScreenChangeNotify
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Window: 58720261
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Root: 2393
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Rotation:  "Rotate_0"
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Size ID: 0
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Size:  3840 2160
Jun 28 20:48:19 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         SizeMM:  1016 571
Jun 28 20:48:20 slim org.kde.KScreen[1748]: kscreen.xrandr: Emitting configChanged()
- when pulling the cable out:

Code: Select all

Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper: RRScreenChangeNotify
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Window: 58720261
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Root: 2393
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Rotation:  "Rotate_0"
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Size ID: 0
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         Size:  3840 2160
Jun 28 20:48:27 slim org.kde.KScreen[1748]: kscreen.xcb.helper:         SizeMM:  1016 571
Jun 28 20:48:28 slim org.kde.KScreen[1748]: kscreen.xrandr: Emitting configChanged()
Here's what `lspci -k -vv` shows about my video card:

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01:00.0 VGA compatible controller: NVIDIA Corporation TU117M [GeForce GTX 1650 Ti Mobile] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: Lenovo TU117M [GeForce GTX 1650 Ti Mobile]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 185
        IOMMU group: 1
        Region 0: Memory at ad000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at 80000000 (64-bit, prefetchable) [size=256M]
        Region 3: Memory at 90000000 (64-bit, prefetchable) [size=32M]
        Region 5: I/O ports at 3000 [size=128]
        Expansion ROM at ae080000 [virtual] [disabled] [size=512K]
        Capabilities: <access denied>
        Kernel driver in use: nvidia
        Kernel modules: nvidia
My kernel is `5.10.0-15-amd64`.

What could be the problem?

Segfault
Posts: 993
Joined: 2005-09-24 12:24
Has thanked: 5 times
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Re: No HDMI output on Bulseye

#2 Post by Segfault »

Quick internet search shows it likely has hybrid graphics. I did not search further, thus I don't know if it is Optimus or something else. This should get you started. Figure out the nature of your graphics and follow proper documentation.

panpan
Posts: 61
Joined: 2015-09-18 17:07
Has thanked: 3 times

Re: No HDMI output on Bulseye

#3 Post by panpan »


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