I have a few dodgy cheap SSDs, so I’m not surprised by slow I/O performance in general. But my Plasma desktop frequently freezes for 1-3 seconds (including the cursor!) whenever there is high IO load, for example while installing a Steam game.
Updating the screen should be completely independent from I/O, shouldn’t it? Is there anything I could’ve misconfigured in my Arch Linux? I’m running Plasma 6.1.4 in Wayland.
Chiming in to say that I’ve also experienced this on systems with an unresponsive NFS mount, although in that case it hangs until the connection is restored or the network operation times out.