EM7305 USB ports lag in Ubuntu 22.04

Connectivity and Cloud Services
1

Describing a strange phenomenon:

The EM7305 modem initially starts as /dev/ttyUSB0.
After about 10 minutes, three more ports will be added automatically. ttyUSB1 to ttyUSB3.
This is accompanied by the status message:

Qualcomm USB modem converter now attached to ttyUSB1
Qualcomm USB modem converter now attached to ttyUSB2
Qualcomm USB modem converter now attached to ttyUSB3

How can I ensure that these ports are available immediately at startup?

Thanks.

2

do you see problem with Ubuntu 20?

I saw a lot of user saying Ubuntu 22 is slow

https://www.reddit.com/r/Ubuntu/comments/wyyc62/ubuntu_2204_is_absolutely_nightmare_slow_and_laggy/

3

I haven’t tested it in Ubuntu 20.
Ubuntu 22.04 runs fast on my laptop.

Yes, it might be a lack in the OS. Maybe it is caused by the network manager, who pings the hardware and takes a long time decision how to handle the tty-ports.

Maybe.