I run the kubuntu 16.10 with all latest updates, kernel 4.8.0-38 x86_64 and I'm experiencing this problem:
The system used to work with all my USB flash drives perfectly and now it suddenly stopped. No USB drive is recognized or mounted. Here is my research:
- The flash drives are OK since they work fine on other computers.
- USB ports are OK. Other devices like USB keyboard or USB mouse work flawlessly in all USB ports.
- If I boot the kubuntu live CD (16.10) then the very same USB drives on the very same computer are recognized withouth any problem.
- I have another 2 computers with kubuntu 16.10 with the same updates and all the USB drives work fine there.
- The system knows about the USB drive being inserted into the USB port, because:
- the device is correctly listed in the lsusb list
- a message appears in dmesg and it says that new usb device being connected. But there is no info about /dev/sdx being assigned to it.
So the device is connected, but because it has no /dev/sdx it is not accessbale for fdisk or mount.
Also the sound output stopped working for no reason and it works fine in live-CD, but I don't know whether there is any relaion between this two issues.
Any ideas? Thanks in advance.
# tail -f /var/log/syslog kernel: [80138.724578] usb 2-1.5: new high-speed USB device number 15 using ehci-pci kernel: [80138.838130] usb 2-1.5: New USB device found, idVendor=0930, idProduct=6545 kernel: [80138.838133] usb 2-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 kernel: [80138.838135] usb 2-1.5: Product: USB Flash Memory kernel: [80138.838137] usb 2-1.5: Manufacturer: kernel: [80138.838139] usb 2-1.5: SerialNumber: 6C626DBED999ED607000235D mtp-probe: checking bus 2, device 15: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5" mtp-probe: bus: 2, device: 15 was not an MTP device