22.04 beta live cd hangs

[Rob Peters]

Thinkpad t510. Create live CD and then boot. Shortly after desktop launched the session hangs due to the intel_iommu being set to on. If I change boot line to intel_iommu=off the live session works correctly.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-25-generic 5.15.0-25.25
ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30
Uname: Linux 5.15.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu80
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rob 20717 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: Budgie:GNOME
Date: Sun Apr 10 08:28:37 2022
MachineType: LENOVO 4384AJ9
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-25-generic root=UUID=fee8c01f-ad0a-4c46-a956-7d692183fffc ro quiet splash intel_iommu=off vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-25-generic N/A
 linux-backports-modules-5.15.0-25-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/26/2012
dmi.bios.release: 1.82
dmi.bios.vendor: LENOVO
dmi.bios.version: 6MET92WW (1.52 )
dmi.board.name: 4384AJ9
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.ec.firmware.release: 1.33
dmi.modalias: dmi:bvnLENOVO:bvr6MET92WW(1.52):bd09/26/2012:br1.82:efr1.33:svnLENOVO:pn4384AJ9:pvrThinkPadT510:rvnLENOVO:rn4384AJ9:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:sku:
dmi.product.family: ThinkPad T510
dmi.product.name: 4384AJ9
dmi.product.version: ThinkPad T510
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.