[Bug 2084046] Re: [i915] Phantom "Unknown" display detected on Intel Meteor Lake

I have added the above-mentioned part to the kernel command line (file
/etc/default/grub), done "sudo update-grub", and rebooted.

After that, the ghost screen is still there (I only had used the
temporary workaround before booting).

I have run

sudo dmesg > dmesg-boot-log-20241031.txt

to obtain a boot log and attach the output.

** Attachment added: "dmesg-boot-log-20241031.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2084046/+attachment/5833459/+files/dmesg-boot-log-20241031.txt

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https://bugs.launchpad.net/bugs/2084046

Title:
[i915] Phantom "Unknown" display detected on Intel Meteor Lake

Status in linux package in Ubuntu:
Confirmed

Bug description:
Settings is reporting a second display ("Unknown") is connected. This
is on a laptop which has nothing plugged in and only an Intel GPU.

It appears the problem is once again (like bug 2060268) SimpleDRM:

Node: /dev/dri/card0
├───Driver: simpledrm (DRM driver for simple-framebuffer platform devices) version 1.0.0 (0)
--
Node: /dev/dri/card1
├───Driver: i915 (Intel Graphics) version 1.6.0 (0)

Linux version 6.11.0-8-generic (buildd@lcy02-amd64-042) (x86_64-linux-
gnu-gcc-14 (Ubuntu 14.2.0-4ubuntu2) 14.2.0, GNU ld (GNU Binutils for
Ubuntu) 2.43.1) #8-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 16 13:41:20 UTC
2024 (Ubuntu 6.11.0-8.8-generic 6.11.0)

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