# USB Devices Not Recognized - Strange Side Effects

Hi.

I've just installed Fedora 20 onto my HP Pavilion G6 laptop, and everything was working well, for a little while.

Since I use the machine essentially as a second desktop, It's got a full compliment of accessories to go with it - a mouse, a keyboard, a hard drive, all of which are USB devices.

Upon initial install, all of the devices were working as expected.

When I restarted the computer, it hung on the final line of output "Rebooting.", which looks something like this:

[ OK ] Failed unmounting /home
[ OK ] Failed unmounting /boot
[ OK ] Failed unmounting temporary directory
[ OK ] Reached target Unmount All Filesystems
[ OK ] Stopped target Local File Systems (Pre).
Stopping Remount Root and Kernel File Systems...
[ OK ] Stopped Remount Root and Kernel File Systems.
[ OK ] Started Show Plymouth Reboot Screen.
[ OK ] Started Restore /run/initramfs.
[ OK ] Reached Target Shutdown.
Cannot finalize remaining file systems and devices, giving up. # Hah, right!
dracut Warning: Killing all remaining processes
dracut Warning: Cannot mount /oldroot
dracut Warning: Blocking umount of /oldroot [487] /usr/lib/systemd/systemd-udevd
dracut Warning: lrwxrwxrwx. 1 root 0 0 Dec 23 21:03 /proc/487/exe -> /oldroot/usr/lib/systemd-udevd
dracut Warning: total 0
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 0 -> /oldsys/dev/null
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 1 -> /oldsys/dev/null
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 10 -> socket:[11580]
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 11 -> /oldroot/etc/udevd/hwdb.bin
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 13 -> socket:[11513]
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 2 -> /oldsys/dev/null
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 3 -> anon_inode:[signal15]
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 4 -> /oldsys/dev/null
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 5 -> socket:[11520]
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 6 -> socket:[11518]
dracut Warning: lrwx-------. 1 root 0 64 Dec 23 21:03 7 -> /oldsys/dev/null
Rebooting.


This is transcribed as accurately as possible - I took (blurry) pictures.

Similarly, powering off the computer, with both GUI and CLI, provided extremely similar errors. When I am forced to kill power to turn off my computer, I boot without issue (or so I believe) and none of the USB devices work. If I have booted with a device plugged in, powering off gives me error output to reflect this - similar to what is posted above.

This happens every time the computer is booted/rebooted/powered-down with a USB peripheral - there is nothing in dmesg to indicate a USB is detected, yet the dracut warnings signal the device IDs that are assigned to the ports when everything is working correctly (Before ...

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So connecting ANY single usb device to any port causes shutdown hangs? Is your Fedora fully up-to-date? One can distinguish between systemd and kernel problems http://freedesktop.org/wiki/Software/systemd/Debugging/#diagnosingshutdownproblems . If it points the kernel you have a choice of 3.11, 3.12 and 3.13 kernels (from rawhide: yum install fedora-release-rawhide; yum install kernel --enablerepo=rawhide): Other than this: check for bios updates, try installing e.g. ubuntu

( 2014-01-04 07:08:37 -0500 )edit

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Firstly, I apologize for the duplicate question https://ask.fedoraproject.org/question/37748/usb-devices-not-recognized-strange-side-effects/ (here).

But the problem has been solved with lucky voodoo magic: A complete reinstall (for a fourth time) fixed the problem; same edition, same MD5, etc.

Whatever the issue was, it's gone now. Because the checksum is and was the same across all repeated downloads, this must have been either a problem with my hardware (maybe the USB install drive), or a software bug. What precisely the problem was, escapes me, but it is no longer relevant.

As such, if anyone has the same problem, I suggest you simply re-download the disk image, verify it, and burn the drive again.

Thanks.

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Okay, I can't post links: check marcindulak's comment above for the link to the dupe if you want, for some reason.

( 2014-01-06 15:39:06 -0500 )edit

Are you sure it isn't a USB3/2 problem. I've had trouble connecting USB2 devices to USB3 ports :S

( 2014-01-07 11:00:27 -0500 )edit