Hi,
I’m experiencing a strange system (Fedora 40 KDE) behavior after connecting an external 15-inch touch display.
Connecting the display causes:
- waiting several seconds for
sudo
(issued in bash Konsole) password prompt to appear - waiting several seconds for file picker dialog to appear
- waiting several seconds for Dolphin to appear
- once opened, navigating is a breeze, as it should be
- opening any additional Dolphin window has the same lag time
Konsole, Firefox and many other are not affected.
There is nothing different from when the external monitor is disconnected upon performing any of the problematic actions in:
journalctl -f
sudo dmesg
Disconnecting the display makes all the lagging go away.
What could be the cause? Where to look for clues? How are sudo
password prompt and Dolphin window both affected in the same way (long wait time for) by connecting the external display?
The display is:
- connected with HDMI (laptop) <> miniHDMI (display)
- powered with USB-C (laptop, no DisplayPort or PowerDelivery port capability) <> USB-C (display)
- like this one https://www.amazon.com/Wstirhy-Portable-Monitor-Freestanding-Built/dp/B0CRDWG1X8 (I can’t find the exact one anymore but it’s this brand on it - Wstirhy)
I almost always use my laptop with (desk) external monitors without any issues. I have used this portable 15’’ one in the past (last time in April) without issues as well.