Public bug reported:

xorg 1:7.7+23ubuntu3

Using FDE with fully up to date Ubuntu 24.04 as single boot on Intel mac
mini 2018.

This is the first install where I used FDE, it's been running fine, with 
updates for a couple of months.
I recently moved from HDMI-HDMI to USB-C-DP primarily because hot-swapping 
display with another macmini works well.

However, on the most recent update, today, on rebooting, after selecting 
ubuntu(ie at the boot level, rather than say rescue mode), the display 
subsequently failed to show FDE login.
After a few reboots, I tried changing cable back to HDMI-HDMI and was able to 
login.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 7.0.0-34.34~24.04.1-generic 7.0.14
Uname: Linux 7.0.0-34-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct  1 15:08:41 2026
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630] [8086:3e9b] (prog-if 00 
[VGA controller])
   Subsystem: Apple Inc. CoffeeLake-H GT2 [UHD Graphics 630] [106b:0207]
InstallationDate: Installed on 2026-07-18 (75 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
MachineType: Apple Inc. Macmini8,1
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-34-generic 
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2026
dmi.bios.release: 0.1
dmi.bios.vendor: Apple Inc.
dmi.bios.version: 2103.100.6.0.0 (iBridge: 23.16.15067.0.0,0)
dmi.board.name: Mac-7BA5B2DFE22DDD8C
dmi.board.vendor: Apple Inc.
dmi.board.version: Macmini8,1
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-7BA5B2DFE22DDD8C
dmi.modalias: 
dmi:bvnAppleInc.:bvr2103.100.6.0.0(iBridge23.16.15067.0.0,0):bd04/18/2026:br0.1:svnAppleInc.:pnMacmini8,1:pvr1.0:rvnAppleInc.:rnMac-7BA5B2DFE22DDD8C:rvrMacmini8,1:cvnAppleInc.:ct9:cvrMac-7BA5B2DFE22DDD8C:sku:pfaMacmini:
dmi.product.family: Mac mini
dmi.product.name: Macmini8,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.125-1ubuntu0.1~24.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 25.2.8-0ubuntu0.24.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.17-2ubuntu0.1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble ubuntu wayland-session

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https://bugs.launchpad.net/bugs/2169160

Title:
  When using FDE at boot display using USB-C to DP fails

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