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Thread: connecting two external monitors with Ubuntu 22.04

  1. #1
    Join Date
    Oct 2024
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    2

    connecting two external monitors with Ubuntu 22.04

    I know this question has been addressed several times but I can't find the right answer to my problem -- sorry for posting again about this.


    I have a HP Elitebook with a a Mesa Intel GPU. The OS is Ubuntu 22.04.


    I can plug one external monitor with the built-in HDMI port of the laptop. This works. I want to plug a second HDMI monitor through one of the USB-C port, with a USB-C/HDMI adaptor.


    This used to work, and it suddenly stopped working, I have no idea why.


    This is NOT a cable or adapter issue. They all work when tested separately.


    What are the software solutions I should try?


    Everything I read is about Nvidia, not Intel GPU.


    Thanks!

  2. #2
    Join Date
    Aug 2017
    Location
    melbourne, au
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    Distro
    Lubuntu Development Release

    Re: connecting two external monitors with Ubuntu 22.04

    I'd explore when this issue first started occurring, and what change(s) were made in the session BEFORE the problem appeared.

    I don't know how often you use your machine, how often you apply upgrades & security fixes; but if you can't recall making a change yourself, I'd explore system logs for update fixes.

    eg. some many weeks ago the HWE kernel stack for 22.04 switched from 6.5 to 6.8 kernel and thus your change maybe related to that for example; your logs will show when that change occurred and if that occurred at that time, the easy workaround maybe switching from the HWE kernel stack to GA, but before even doing that I'd reboot the machine & select an older kernel (you may still have a 6.5 kernel installed) and see if the problem occurs there.. If it doesn't, and only when you boot 6.8 kernels; you have at least something to work with... This is said only as example; as I don't know what you're actually using (you mention only 22.04, and you may be using the GA kernel stack thus this paragraph doesn't even apply).

    My 2c thought anyway.

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