Public bug reported:

This started to happen after installing the last update last week. If I
lock the screen (using either Win+L or opening the menu and clicking
Lock) the screen turns to black and it doesn't come back anymore. I know
the system is still operational since the NumLock button still responds
(turns on and off If I press it) and the HotSpot still works on my
phone, but the screen just doesn't come back from black. This wasn't an
issue before the update, it is very recent. Thank you very much!

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
Uname: Linux 5.4.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Jun 12 22:51:13 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 6.1.6, 5.4.0-33-generic, x86_64: installed
 virtualbox, 6.1.6, 5.4.0-37-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GpuHangFrequency: Several times a day
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Within the last week or two
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 
0b) (prog-if 00 [VGA controller])
   Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:0640]
   Subsystem: Dell Radeon R7 M260/M265 [1028:0640]
MachineType: Dell Inc. Inspiron 5447
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-37-generic 
root=UUID=45c56570-89cf-4b2d-8f15-ee1ce0d54f68 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/12/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0MHP6R
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A05
dmi.modalias: 
dmi:bvnDellInc.:bvrA05:bd08/12/2014:svnDellInc.:pnInspiron5447:pvrA05:rvnDellInc.:rn0MHP6R:rvrA01:cvnDellInc.:ct8:cvrA05:
dmi.product.family: 00
dmi.product.name: Inspiron 5447
dmi.product.sku: Inspiron 5447
dmi.product.version: A05
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102+git2006051830.5ab603~oibaf~f
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2~git2006110730.27b7b8~oibaf~f
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2~git2006110730.27b7b8~oibaf~f
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1
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: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal freeze third-party-packages ubuntu

** Description changed:

- This started to happen after I install the last update last week, at
- first it would occur a few times, but now is every time. If I lock the
- screen (using either Win+L or opening the menu e click Lock) the screen
- turns to black and it doesn't come back anymore. I know the system is
- still operational since the NumLock button still responds (turns on and
- off If I press it) and the HotSpot still works on my phone, but the
- screen just doesn't come back from black. This wasn't an issue before
- the update, it is very recent. Thank you very much!
+ This started to happen after installing the last update last week. If I
+ lock the screen (using either Win+L or opening the menu and clicking
+ Lock) the screen turns to black and it doesn't come back anymore. I know
+ the system is still operational since the NumLock button still responds
+ (turns on and off If I press it) and the HotSpot still works on my
+ phone, but the screen just doesn't come back from black. This wasn't an
+ issue before the update, it is very recent. Thank you very much!
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Jun 12 22:51:13 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
-  virtualbox, 6.1.6, 5.4.0-33-generic, x86_64: installed
-  virtualbox, 6.1.6, 5.4.0-37-generic, x86_64: installed
+  virtualbox, 6.1.6, 5.4.0-33-generic, x86_64: installed
+  virtualbox, 6.1.6, 5.4.0-37-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Within the last week or two
  GraphicsCard:
-  Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] 
(rev 0b) (prog-if 00 [VGA controller])
-    Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:0640]
-    Subsystem: Dell Radeon R7 M260/M265 [1028:0640]
+  Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] 
(rev 0b) (prog-if 00 [VGA controller])
+    Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:0640]
+    Subsystem: Dell Radeon R7 M260/M265 [1028:0640]
  MachineType: Dell Inc. Inspiron 5447
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-37-generic 
root=UUID=45c56570-89cf-4b2d-8f15-ee1ce0d54f68 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/12/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0MHP6R
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A05
  dmi.modalias: 
dmi:bvnDellInc.:bvrA05:bd08/12/2014:svnDellInc.:pnInspiron5447:pvrA05:rvnDellInc.:rn0MHP6R:rvrA01:cvnDellInc.:ct8:cvrA05:
  dmi.product.family: 00
  dmi.product.name: Inspiron 5447
  dmi.product.sku: Inspiron 5447
  dmi.product.version: A05
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.102+git2006051830.5ab603~oibaf~f
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.2~git2006110730.27b7b8~oibaf~f
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.2~git2006110730.27b7b8~oibaf~f
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1
  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

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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1883334

Title:
  Xorg freezes after Lock (win+L or via Menu>Lock)

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