Hi AceLan, Would you mind to read this thread and evaluate whether it is helpful or not by kernel downgrade? https://bugzilla.kernel.org/show_bug.cgi?id=202541 BTW, would you mind to the shared pcap file permission as well? -Harry ________________________________________ 從: AceLan Kao [acelan.kao@xxxxxxxxxxxxx] 寄件日期: 2019年12月25日 上午 11:15 至: Alan Stern 副本: Greg Kroah-Hartman; Kai-Heng Feng; Thinh Nguyen; Pan, Harry; David Heinzelmann; Andrey Konovalov; Nicolas Saenz Julienne; Mathieu Malaterre; linux-usb@xxxxxxxxxxxxxxx; Linux-Kernel@Vger. Kernel. Org 主旨: Re: [PATCH] usb: hub: move resume delay at the head of all USB access functions Here[1] are the dmesg and the usbmon log from wireshark, and /sys/kernel/debug/usb/usbmon/0u. I verified this issue on Dell XPS 13 + Dell Salomon WD19 docking station(plug-in 3 USB disk on it) After s2idle 7 times, 2 usb disks lost. But from wireshark log, the packets look normal, no error. So, I re-do the test again and log the usbmon/0u output, but it's greek to me. Hope you can help to find some clues in the logs. Thanks. 1. https://people.canonical.com/~acelan/bugs/usb_issue/
