Public bug reported: [Steps to reproduce this issue]
1. Install a focal base image 2. Attach an AMD R7 430 graphic as dGPU without connecting any monitor on it. 3. Attach DP monitor on iGPU (no matter the iGPU is Intel(i915), or AMD(amdgpu)). 4. After logging it, the display shows laggy. [Additional information] 1. doesn't see this issue if selecting 'Wayland' ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xserver-xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.10.0-1019.20-oem 5.10.18 Uname: Linux 5.10.0-1019-oem x86_64 ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 CasperMD5CheckResult: skip Date: Fri Apr 9 16:23:42 2021 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-stella-focal-amd64-20210324-1458+pc-stella-cmit-focal-amd64+X00 DistroCodename: focal DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 / Radeon 520 OEM] [1002:6611] (rev 87) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Oland [Radeon HD 8570 / R7 240/340 / Radeon 520 OEM] [103c:3375] Advanced Micro Devices, Inc. [AMD/ATI] Renoir [1002:1636] (rev da) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Renoir [103c:872b] InstallationDate: Installed on 2021-04-09 (0 days ago) InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20210324-23:53 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.10.0-1019-oem root=UUID=027c2398-aef7-43d2-a339-6a2163287914 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/30/2020 dmi.bios.release: 2.0 dmi.bios.vendor: HP dmi.bios.version: S09 Ver. 02.02.00 dmi.board.name: 872B dmi.board.vendor: HP dmi.board.version: KBC Version 09.94.00 dmi.chassis.type: 3 dmi.chassis.vendor: HP dmi.ec.firmware.release: 9.148 dmi.modalias: dmi:bvnHP:bvrS09Ver.02.02.00:bd12/30/2020:br2.0:efr9.148:svnHP:pn:pvr:rvnHP:rn872B:rvrKBCVersion09.94.00:cvnHP:ct3:cvr: dmi.product.family: 103C_53307F HP EliteDesk dmi.sys.vendor: HP 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 2:1.20.9-2ubuntu1.2~20.04.1 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: oem-priority Importance: Critical Assignee: jeremyszu (os369510) Status: Confirmed ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal oem-priority originate-from-1916427 stella ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1923153 Title: Display output laggy from iGPU when operating on desktop with attaching AMD R7 430 graphic (dGPU) To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1923153/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
