This is a known issue.
1. The first big improvement was tracked in bug 1970291 but you have
that already. So it used to be worse...
2. The second big improvement is in Mutter 48.0 (Ubuntu 25.04) thanks to
mutter!4015 and mutter!4027. We should track those in this bug. If you
have a hybrid machine then you can /usually/ work around it by using the
USB-C ports wired to your iGPU for all external monitors.
3. The remaining performance gap in Ubuntu 25.10 is being tracked in bug
2081140.
The workaround you mention of enabling screen capture probably just
works be keeping clock frequencies high. That's not unusual, but also
not desirable in a laptop.
** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu)
** Changed in: gnome-shell (Fedora)
Importance: Unknown => Undecided
** Changed in: gnome-shell (Fedora)
Remote watch: gitlab.gnome.org/GNOME/mutter/-/issues #3461 => None
** Package changed: gnome-shell (Fedora) => ubuntu
** No longer affects: ubuntu
** Changed in: mutter (Ubuntu)
Milestone: None => ubuntu-25.04
** Changed in: mutter (Ubuntu)
Importance: Undecided => Medium
** Changed in: mutter (Ubuntu)
Status: New => Fix Released
** Also affects: mutter (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: mutter (Ubuntu Oracular)
Importance: Undecided
Status: New
** Also affects: mutter (Ubuntu Plucky)
Importance: Medium
Status: Fix Released
** Tags added: hybrid nvidia nvidia-wayland performance
** Changed in: mutter (Ubuntu Oracular)
Importance: Undecided => Medium
** Changed in: mutter (Ubuntu Noble)
Importance: Undecided => Medium
** Changed in: mutter (Ubuntu Oracular)
Milestone: None => oracular-updates
** Changed in: mutter (Ubuntu Noble)
Milestone: None => noble-updates
** Changed in: mutter (Ubuntu Oracular)
Status: New => Triaged
** Changed in: mutter (Ubuntu Noble)
Status: New => Triaged
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to mutter in Ubuntu.
https://bugs.launchpad.net/bugs/2105500
Title:
Low FPS on wayland when running dual monitors on laptop with Nvidia
GPU and iGPU
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