Well if I were you I would start by Googling “usb hot plugging linux Fedora 23” then for “24” and possibly look into how UEFI secure might affect what systems/modules are signed and therefor loaded.



On Sun, May 15, 2016 at 5:58 PM, Ed Greshko <ed.greshko@greshko.com> wrote:

On 05/15/16 19:22, Timothy Murphy wrote:

Fedora-23 does not see my USB ports, but Fedora-24 beta does:
===========================
[tim@william ~]$ cat /etc/fedora-release
Fedora release 24 (Twenty Four)
[tim@william Tel]$ lsusb
Bus 002 Device 003: ID 17ef:1003 Lenovo Integrated Smart Card Reader
Bus 002 Device 002: ID 8087:0020 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation
Bus 001 Device 004: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
Bus 001 Device 002: ID 8087:0020 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation

[tim@william ~]$ cat /etc/fedora-release
Fedora release 23 (Twenty Three)
[tim@william ~]$ lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
===========================

I'm running F-23 and F-24 (beta) on separate partitions.
I used to see the USB ports under F-23.
The change happened more or less when I installed F-24,
though I can't see how that could have caused the USB loss.
F-23 and F-24 share my /home partition,
so it is conceivable that some change there could be the cause.
Also the bootloader in /dev/sda presumably changed with F-24 installation

I'm afraid I'm completely ignorant of USB software.
I couldn't see what kernel module, if any, deals with USB.

Any suggestions or elucidation gratefully received.

I suppose that I would run "strace -o somefile lsusb" on both the F23 and F24 system to see if something obvious pops out.  Before that, I would also run lsusb as root on the F23 system for kicks.


--
You're Welcome Zachary Quinto

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