Sometimes when I reboot, during login and use of Gnome, it is very lethargic (i.e. laggy). Maximizing windows might take a second or more. Clicking the panel to, say, make Bluetooth settings might take a second or two.
The fix is to either reboot, or turn my machine off for a bit, then turn it back on. Sometimes just rebooting helps, sometimes I have to power down.
I’ve looked at logs in the past, but they’re a lot of haystack, and not much needle.
This may very well be because I have two GPUs, an Intel Arc A380 that drives my displays, and an Nvidia RTX A4500 for CUDA/machine learning only.
A fix would be nice, but it’s definitely something I can work around, just a papercut 
john@beast
----------
OS: Bluefin (Version: 41.20250209.1 / FROM Fedora Silverblue 41) x86_64
Kernel: Linux 6.12.9-200.fc41.x86_64
Uptime: 21 mins
Packages: 2551 (rpm), 74 (flatpak), 276 (brew)
Shell: zsh 5.9
Display (LG SDQHD): 2560x2880 @ 60 Hz in 28" [External]
Display (LG SDQHD): 2560x2880 @ 60 Hz in 28" [External] *
Display (LG Ultra HD): 3840x2160 @ 60 Hz in 27" [External]
DE: GNOME 47.2
WM: Mutter (Wayland)
WM Theme: Adwaita
Theme: Adwaita [GTK2/3/4]
Icons: Adwaita [GTK2/3/4]
Font: Inter (12pt) [GTK2/3/4]
Cursor: Adwaita (24px)
Terminal: Ptyxis 47.6
Terminal Font: JetBrains Mono (18pt)
CPU: 13th Gen Intel(R) Core(TM) i9-13900K (32) @ 5.80 GHz
GPU 1: NVIDIA RTX A4500
GPU 2: Intel Arc A380 @ 2.45 GHz [Discrete]
Memory: 46.99 GiB / 125.48 GiB (37%)
Swap: 0 B / 8.00 GiB (0%)
Disk (/sysroot): 1.15 TiB / 1.82 TiB (63%) - btrfs [Read-only]
Disk (/var/mnt/nvme): 2.85 TiB / 3.64 TiB (78%) - btrfs
Disk (/var/mnt/tank): 24.24 TiB / 42.16 TiB (58%) - zfs
Local IP (eno1): 10.0.0.9/24
Locale: en_US.UTF-8
I have these (User) extensions installed:
Auto Move Windows
auto-move-windows@gnome-shell-extensions.geampax.github.com
Highlight Focus
highlight-focus@pimsnel.com
Just Perfection
just-perfection-desktop@just-perfection
Panel World Clock (Lite)
world_clock_lite@ailin.nemui
StreamController Integration
streamcontroller@core447.com
Workspaces indicator by open apps
workspaces-by-open-apps@favo02.github.com