OK, please verify the kernel version you're seeing the glitch in by
running:

  uname -a

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1937072

Title:
  [Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws

Status in linux package in Ubuntu:
  Triaged
Status in linux-hwe-5.11 package in Ubuntu:
  Triaged

Bug description:
  In every 6/10 boot my ubuntu failed to start stuck on blank screen.
  Sometime touchpad stop working and unable to change my brightness
  after installation at first all feature are perfectly fine except
  screen glitch.Screen performance is laggy.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: xorg 1:7.7+22ubuntu1
  ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
  Uname: Linux 5.11.0-25-generic x86_64
  ApportVersion: 2.20.11-0ubuntu65.1
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: pass
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jul 21 17:13:28 2021
  DistUpgraded: Fresh install
  DistroCodename: hirsute
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00 
[VGA controller])
     Subsystem: Lenovo Iris Plus Graphics G7 [17aa:3a34]
     Subsystem: Lenovo GP107M [GeForce MX350] [17aa:3a34]
  InstallationDate: Installed on 2021-07-21 (0 days ago)
  InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  MachineType: LENOVO 82A1
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic 
root=UUID=178639d7-12e5-45ac-a728-0643b1c58d44 ro quiet splash nomodeset 
vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/14/2021
  dmi.bios.release: 1.31
  dmi.bios.vendor: LENOVO
  dmi.bios.version: DHCN31WW
  dmi.board.asset.tag: ���������������
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0Q55722 WIN
  dmi.chassis.asset.tag: ���������������
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Yoga Slim 7 14IIL05
  dmi.ec.firmware.release: 1.29
  dmi.modalias: 
dmi:bvnLENOVO:bvrDHCN31WW:bd01/14/2021:br1.31:efr1.29:svnLENOVO:pn82A1:pvrYogaSlim714IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0Q55722WIN:cvnLENOVO:ct10:cvrYogaSlim714IIL05:
  dmi.product.family: Yoga Slim 7 14IIL05
  dmi.product.name: 82A1
  dmi.product.sku: LENOVO_MT_82A1_BU_idea_FM_Yoga Slim 7 14IIL05
  dmi.product.version: Yoga Slim 7 14IIL05
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.105-3~21.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.1-2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200714-1ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1

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