Thanks for the bug report. Your kernel log is showing a couple of different problems that would explain poor performance:
[ 1432.047693] pcieport 0000:00:1c.4: AER: Corrected error received: 0000:00:1c.4 [ 1432.047705] pcieport 0000:00:1c.4: AER: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID) [ 1432.047713] pcieport 0000:00:1c.4: AER: device [8086:9d14] error status/mask=00000001/00002000 [ 1432.047718] pcieport 0000:00:1c.4: AER: [ 0] RxErr (First) [ 1434.967857] amdgpu: VI should always have 2 performance levels In both cases they are kernel (or hardware) issues. ** Tags added: amdgpu ** Tags added: performance ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Package changed: linux (Ubuntu) => linux-hwe-5.8 (Ubuntu) ** Summary changed: - lagg display + [Lenovo V330-15IKB] lagg display -- 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/1933194 Title: [Lenovo V330-15IKB] lagg display Status in linux-hwe-5.8 package in Ubuntu: Incomplete Bug description: lagg display ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.8.0-55.62~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-55-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Jun 22 11:46:23 2021 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu GraphicsCard: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo UHD Graphics 620 [17aa:3973] Subsystem: Device [03ea:1af4] InstallationDate: Installed on 2021-06-20 (1 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 005: ID 06cb:0081 Synaptics, Inc. Bus 001 Device 003: ID 04ca:7070 Lite-On Technology Corp. Integrated Camera Bus 001 Device 006: ID 1bcf:0005 Sunplus Innovation Technology Inc. Optical Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 81AX ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-55-generic root=UUID=dd6defad-6211-4700-8037-049192e91a9b ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/19/2018 dmi.bios.release: 1.41 dmi.bios.vendor: LENOVO dmi.bios.version: 6SCN41WW dmi.board.asset.tag: No Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo V330-15IKB dmi.ec.firmware.release: 1.19 dmi.modalias: dmi:bvnLENOVO:bvr6SCN41WW:bd12/19/2018:br1.41:efr1.19:svnLENOVO:pn81AX:pvrLenovoV330-15IKB:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrLenovoV330-15IKB: dmi.product.family: V330-15IKB dmi.product.name: 81AX dmi.product.sku: LENOVO_MT_81AX_BU_idea_FM_V330-15IKB dmi.product.version: Lenovo V330-15IKB dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.8/+bug/1933194/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
