What's the best thing to do if your pc decides, of its own volition, not to recognise any form of device, be it your MP3 player, your phone or a usb stick? Try to manually mount the thing? (Found some instructions.) Reboot?
It refused last night, it was fine this morning.
Bev.
On 23/05/18 19:48, Bev Nicolson wrote:
What's the best thing to do if your pc decides, of its own volition, not to recognise any form of device, be it your MP3 player, your phone or a usb stick? Try to manually mount the thing? (Found some instructions.) Reboot?
It refused last night, it was fine this morning.
I've had this happen to me on occasion, but generally with an older machine. I've tried various things. Look at the log files & dmesg & see if you can see why it's happening - in my case it was just not detecting that there was any changes in the number of USB devices installed. If it's not detecting a new device has been installed/connected, then I don't know that there's anything you can do. If on the other hand, you see some sort of error, you can try and fix it.
I don't have any good answers. Think if anything has changed or been updated. See if there are any updates you can apply. Reboot and/or live with it are the only options that I can think of.
It could be a hardware error, a software error or a configuration error & unless you can find an error message it may be hard to get to the bottom of. It might be worth, just in case, making backups of all important information, just in case!
Sorry I can't really be helpful.
Steve
On Wed, 23 May 2018 19:48:06 +0100 Bev Nicolson lumos@gmx.co.uk allegedly wrote:
What's the best thing to do if your pc decides, of its own volition, not to recognise any form of device, be it your MP3 player, your phone or a usb stick? Try to manually mount the thing? (Found some instructions.) Reboot?
Bev
By "any form of device" I'm assuming you mean "any form of USB device". For example, I also assume that your SATA disks are mounted.
First look in syslog (or wherever your USB evanets are logged - if you are not sure try "grep usb /var/log/*" to see which file(s) contains the events. Look for obvious errors such as "failed...". Then try watching that file as you attach a new USB device. For example: "tail -f /var/log/syslog" should give you something like:
May 24 16:20:51 shed kernel: [13358.269901] usb 1-7: new high-speed USB device number 7 using xhci_hcd May 24 16:20:51 shed kernel:[13358.412234] usb 1-7: New USB device found, idVendor=13fe, idProduct=1d00 May 24 16:20:51 shed kernel: [13358.412240] usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=3 May 24 16:20:51 shed kernel: [13358.412244] usb 1-7: Product: DataTraveler 2.0 May 24 16:20:51 shed kernel: [13358.412248] usb 1-7: Manufacturer: Kingston May 24 16:20:51 shed kernel: [13358.412252] usb 1-7: SerialNumber: 5B7307906BF3 May 24 16:20:51 shed kernel: [13358.412977] usb-storage 1-7:1.0: USB Mass Storage device detected
as you insert a USB data stick. If it doesn't you may have a hardware problem. But the error message (if there is one). should tell you something (perhaps the usbcore device driver has failed to load for example)
(As root or sudo as appropriate) try running "lsusb -v" or lsusb -t" to get as much info about what USB devices are on which bus and which port. That may tell you if and where you have a problem.
Get back to the list with as much diagnostic info as you can. Also let us know whether you have changed anything lately.....
Mick
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