Pc crashes when second display is connected

[Massimiliano Piccinini]

From /var/log/kern.log :

Feb 5 11:01:59 nb-mpiccinini kernel: [ 8841.672031] i915 0000:00:02.0: [drm] *ERROR* [CRTC:131:pipe B] flip_done timed out
2832 Feb 5 11:02:44 nb-mpiccinini kernel: [ 8886.728515] i915 0000:00:02.0: [drm] *ERROR* flip_done timed out
2833 Feb 5 11:02:44 nb-mpiccinini kernel: [ 8886.728546] i915 0000:00:02.0: [drm] *ERROR* [CRTC:131:pipe B] commit wait timed out
2834 Feb 5 11:02:44 nb-mpiccinini kernel: [ 8886.742775] rfkill: input handler enabled
2835 Feb 5 11:02:44 nb-mpiccinini kernel: [ 8886.983817] audit: type=1400 audit(1707127364.544:73): apparmor="DENIED" operation="capable" class="cap" profile="/snap/snapd/20671/usr/lib/snapd/snap-confine
2836 Feb 5 11:02:44 nb-mpiccinini kernel: [ 8886.983824] audit: type=1400 audit(1707127364.544:74): apparmor="DENIED" operation="capable" class="cap" profile="/snap/snapd/20671/usr/lib/snapd/snap-confine
2837 Feb 5 11:02:54 nb-mpiccinini kernel: [ 8897.224772] i915 0000:00:02.0: [drm] *ERROR* [CRTC:131:pipe B] flip_done timed out

After that the system hung. Nothing is working. Also num lock and caps lock not light up the keyboards led.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-headers-6.5.0-15-generic 6.5.0-15.15~22.04.1
ProcVersionSignature: Ubuntu 6.5.0-15.15~22.04.1-generic 6.5.3
Uname: Linux 6.5.0-15-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Feb 5 11:13:23 2024
InstallationDate: Installed on 2022-10-13 (479 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-hwe-6.5
UpgradeStatus: No upgrade log present (probably fresh install)