Public bug reported:

Initially, only the mouse works in the gnome lock screen, without any
way to get a password prompt.  It's likely only happening when returning
from suspend with lid open.

It's possible to ssh into the machine or to press Fn+Ctrl+Alt+F?? and
login without gnome.  After this, Fn+Ctrl+Alt+F1 brings up a purple
ubuntu login screen, but then after login you simply return to the lock
screen with no working keyboard.  I never found any method to force
unlock from ssh or another vt though, so this always still required a
reboot, or killing all of gnome.

I've randomly tried some solutions from
https://askubuntu.com/questions/1242110/after-upgrading-to-
ubuntu-20-04-lockscreen-not-working  including reinstalling many gnome
components.  After this, the behavior initially disappeared by returning
from suspend merely took a long time, like 30 seconds or 1 minute.  It's
possible the delay stems from memory size, but a previous identical
lenovo x1 had no such problems.

I've now a worse problem just a few hours later where unsuspend went
directly to a purple ubuntu login screen, but neither the mouse nor
keyboard worked.  I've not yet been able to test ssh on this problem.

It's possibly all connected to recent firmware upgrades, so I'm happy to
try downgrading the firmware, but I've not found any instructions on
doing so, or even identifying the firmware upgrade log.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.14.0-1027.30-oem 5.14.21
Uname: Linux 5.14.0-1027-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar 17 03:44:49 2022
DistUpgraded: Fresh install
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for the OEM CDs
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-sutton-focal-amd64-20210412-218+sutton-newell-focal-amd64+X00
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GpuHangFrequency: Several times a day
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Within the last week or two
GraphicsCard:
 Intel Corporation Device [8086:9a49] (rev 01) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:22d5]
InstallationDate: Installed on 2021-04-15 (335 days ago)
InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20210412-22:07
MachineType: LENOVO 20XWCTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.14.0-1027-oem 
root=UUID=6a411137-06bb-4de1-be93-c2fcd4f44a5a ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/02/2021
dmi.bios.release: 1.51
dmi.bios.vendor: LENOVO
dmi.bios.version: N32ET75W (1.51 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20XWCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.32
dmi.modalias: 
dmi:bvnLENOVO:bvrN32ET75W(1.51):bd12/02/2021:br1.51:efr1.32:svnLENOVO:pn20XWCTO1WW:pvrThinkPadX1CarbonGen9:rvnLENOVO:rn20XWCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20XW_BU_Think_FM_ThinkPadX1CarbonGen9:
dmi.product.family: ThinkPad X1 Carbon Gen 9
dmi.product.name: 20XWCTO1WW
dmi.product.sku: LENOVO_MT_20XW_BU_Think_FM_ThinkPad X1 Carbon Gen 9
dmi.product.version: ThinkPad X1 Carbon Gen 9
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.107-8ubuntu1~20.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.6-0ubuntu0.1~20.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal freeze ubuntu

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https://bugs.launchpad.net/bugs/1965219

Title:
  gnome lock screen does not permit reentering password

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