USB cut off

maxmonz · 12-30-2021, 10:56 AM

Hi,

I have a Lenovo Thinkpad T580 notebook connected to an i-Tec docking station via usb-c cable. All USB peripherals (mouse, keyboard, etc.) and 2 monitors (HDMI) are connected to the docking station.
I used DisplayLink driver to make everything working fine until the version 5.4.0.89 of Linux kernel.
With version 5.4.0.90 and the latest 5.4.0.91 a strange situation occurs. Occasionally the monitors darken and even the mouse does not respond. From in-depth analysis it seems that there is a problem on the USB bus for which the devices are disconnected for a few seconds until everything starts working again.
It is definitely a problem related to the new kernels because everything was fine with the previous ones.
Anyone have an idea and can help me?
Thanks

12-30-2021, 10:56 AM	#1
maxmonz Junior Member Join Date: Dec 2021 Posts: 5	USB cut off Hi, I have a Lenovo Thinkpad T580 notebook connected to an i-Tec docking station via usb-c cable. All USB peripherals (mouse, keyboard, etc.) and 2 monitors (HDMI) are connected to the docking station. I used DisplayLink driver to make everything working fine until the version 5.4.0.89 of Linux kernel. With version 5.4.0.90 and the latest 5.4.0.91 a strange situation occurs. Occasionally the monitors darken and even the mouse does not respond. From in-depth analysis it seems that there is a problem on the USB bus for which the devices are disconnected for a few seconds until everything starts working again. It is definitely a problem related to the new kernels because everything was fine with the previous ones. Anyone have an idea and can help me? Thanks