Created attachment 131317 [details] SSD to HDD crash SUMMARY Copying files from faster drives to slower ones, maxes out their throughput and causes Dolphin to crash if you try to browse folders on the slower drive. reproducibility: always Bugs which might have the same root cause: 208888, 411213, 410760 STEPS TO REPRODUCE 1. Copy something from a faster drive to a slower 2. Try to browse folders on the slower drive OBSERVED RESULT Dolphin crashes EXPECTED RESULT Dolphin remains useable SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20200826 KDE Plasma Version: 5.19.4 KDE Frameworks Version: 5.73.0 Qt Version: 5.15.0 Kernel Version: 5.8.2-1-default OS Type: 64-bit Processors: 12 × AMD Ryzen 5 2600 Six-Core Processor Memory: 15,6 GiB of RAM ADDITIONAL INFORMATION Copying from an SSD or 3.0 USB to HDD causes a crash, however copying from 2.0 USB to HDD doesn't. Both the SSD and the USB remain useable during copying, but browsing the HDD crashes
Created attachment 131318 [details] USB3.0 to HDD crash
> The Wayland connection broke. Did the Wayland compositor die Can you try on X11? This doesn't look IO-related.
It doesn't crash on X11, but it's very sluggish. On wayland the compositor doesn't die, just dolphin
The reason is that UI queues aren't working fast enough, so Wayland thinks the connection broke. X11 handles this situation better. I suggest to report this to QtWayland developers; they may know which component in the Wayland stack needs improvements.