It's fixed. I have two screens (one monitor on the left and one laptop display on the right). So the lag of the window on the right side of monitor was caused by setting laptop display to 125%. When I set the laptop display to 100%, the right side of the larger monitor no longer lags.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1907189 Title: Apps become unresponsive and lag when multiple windows opened Status in mutter package in Ubuntu: Incomplete Bug description: When I open an application like Firefox, I split them into 2 windows and place one to the left and place the other to the right. So each window gets half of the monitor. The right window gets slow when clicking and lags for 2 seconds. But the left window is normal. This happens to all applications when I have 2 windows. (When 1 window only, even if I put it to the right side of the monitor, it still works fine, no lag). Thank you! ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73 Uname: Linux 5.4.0-56-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.11-0ubuntu27.13 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Mon Dec 7 19:33:24 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu DkmsStatus: nvidia, 450.80.02, 5.4.0-54-generic, x86_64: installed nvidia, 450.80.02, 5.4.0-56-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation HD Graphics 630 [8086:591b] (rev 04) (prog-if 00 [VGA controller]) Subsystem: Dell HD Graphics 630 [1028:07be] Subsystem: Dell GP107M [GeForce GTX 1050 Mobile] [1028:07be] InstallationDate: Installed on 2020-06-23 (167 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 003: ID 0cf3:e301 Qualcomm Atheros Communications Bus 001 Device 002: ID 2f68:0082 Hoksi Technology DURGOD Taurus K320 Bus 001 Device 004: ID 0c45:6713 Microdia Integrated_Webcam_HD Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 15 9560 ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-56-generic root=UUID=30757229-adcc-4567-bf22-0a375e36d51d ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/21/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.20.0 dmi.board.name: 0JHP5H dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.20.0:bd07/21/2020:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn0JHP5H:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 15 9560 dmi.product.sku: 07BE dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.14.1+20.04.20200211-0ubuntu1 version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.6 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/mutter/+bug/1907189/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
