I have similar problem. I'm currently using Ubuntu 22.04.4 LTS (x86_64). Since some days (maybe three?) I see very odd behaviour from programs running in gnome-terminal (or xfce4-terminal if it does not matter, I guess the problem is not the terminal itself but VTE probably or similar? - no problem when using KDE's Konsole for example!). I also have nvidia's driver.
Some programs "only" have very significant input delay, sometimes like 1 sec or so. However interestingly some programs (most notably neomutt) has "infinite" delay, ie, it lags behind exactly one key. For example if I move upwards in the email list, then pressing down still moves up once. And so on, it seems to be true for all keys. Other applications running in terminal seems to "only" have more significant delay, but it's not always consistent. Especially ssh'ing to a remote machine is a very bad experience now, but even on the local host, without any ssh involved just the shell, it's very notable. $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.4 LTS Release: 22.04 Codename: jammy $ dpkg -l | grep mutter ii gir1.2-mutter-10:amd64 42.9-0ubuntu7 amd64 GObject introspection data for Mutter ii libmutter-10-0:amd64 42.9-0ubuntu7 amd64 window manager library from the Mutter window manager ii mutter-common 42.9-0ubuntu7 all shared files for the Mutter window manager -- 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/2059847 Title: Input lag in native terminal on Nvidia desktops with X11 Status in Mutter: New Status in mutter package in Ubuntu: Triaged Bug description: There is a noticeable delay in input while using the native terminal. I belive it was caused by a recent software update, as this issue is relatively new. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 6.5.0-26.26~22.04.1-generic 6.5.13 Uname: Linux 6.5.0-26-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia wl ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Mar 30 19:57:13 2024 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash --- InstallationDate: Installed on 2024-03-30 (0 days ago) InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240220) SourcePackage: ubiquity Symptom: installation UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/2059847/+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