Hello I installed CentOS 8 on a clean system.I tested a pl2303 ic with different PID. If i use HP PID 0x4349,i will receive junk data after connecting, but the pl2303 PID 0x2303 work normally. Does someone know about how to fix this situation? thanks Test video link: HP VID/PID - https://www.dropbox.com/s/9hj7im5tr4e1v1u/HP.mp4?dl=0 Prolific VID/PID - https://www.dropbox.com/s/7vahhzjx64g1fs4/Prolific.mp4?dl=0 -- 雷寶科技股份有限公司 LABAU Technology Corp. Scott Chen TEL : 22182277 ext:382 FAX : 22185522 地址 :新北市新店區中正路531-1號9樓