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I'm facing a frustrating issue with my Dell XPS 15 7590 after upgrading to Kubuntu 24.04 with kernel 6.8. The system won't boot normally and gets stuck during the boot process, but it does boot successfully if I use the nomodeset parameter in Grub. Here is the configuration from my /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=1"
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=1 i915.enable_rc6=1 i915.enable_fbc=1 i915.enable_psr=1"

I tried uncommenting the other lines one by one, but the system only boots with the first configuration. The problem is that with 'nomodeset', my system doesn't recognize my second monitor, which I need for work.

Here's a summary of my situation:

  • Laptop Model: Dell XPS 15 7590
  • Graphics: Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630]
  • OS: Kubuntu 24.04 with kernel 6.8

If anyone has encountered a similar issue or has suggestions on how to resolve this while still being able to use my second monitor, I would greatly appreciate your help!

Thanks in advance for your support!

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  • What is the full kernel number of the kernel in use? It may work if you move down 1 kernel version. Example 6.8.41 move down to 6.8.35, these are just examples.
    – David
    Commented 2 days ago
  • Did you boot the Kubuntu 24.04 LTS ISO in live mode and test it on your hardware before upgrade (I gather you did;' especially since the upgrade from 22.04 isn't yet deemed stable) as you don't mention how that testing showed it worked. If it worked in that environment, I'd expect it to work on your upgraded system too (assuming you read the caveats on upgrade & none of them applied; sorry I've not looked for your hardware, but I assume you did; ie. release notes, release status tracking etc)
    – guiverc
    Commented 2 days ago
  • "What is the full kernel number of the kernel in use?" It's a 6.8.0-35-generic
    – Roman Arkharov
    Commented yesterday
  • "Did you boot the Kubuntu 24.04 LTS ISO in live mode and test it on your hardware before upgrade" - No, shame on me, but unfortunately I didn't do it :(. Updated from 20.04 to 22.04 was completed smoothly and I didn't expect any issues in this case :(
    – Roman Arkharov
    Commented yesterday

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