Como diz na lata, eu tenho flash drive que há alguns dias funcionou muito bem, mas agora não montará nem será reconhecido pelo utilitário Disks. Eu não tenho ideia do porque isso está acontecendo, mas quero consertar isso. O conteúdo da unidade é descartável, por isso não se preocupe com isso. Eu tenho o Ubuntu 16.04LTS de 64 bits.
Edit: Foi perguntado sobre a saída de dmesg|tail -50 , que está abaixo
[56868.407682] ata1.00: configured for UDMA/133
[56868.412174] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[56868.416116] ata2.00: configured for UDMA/133
[56868.876250] [drm] ib test on ring 2 succeeded in 0 usecs
[56868.876354] [drm] ib test on ring 3 succeeded in 0 usecs
[56868.876434] [drm] ib test on ring 4 succeeded in 0 usecs
[56869.396256] [drm] ib test on ring 5 succeeded
[56869.417109] [drm] ib test on ring 6 succeeded
[56869.417950] [drm] ib test on ring 7 succeeded
[56871.519812] [drm] probing gen 2 caps for device 1022:1425 =733d01/e
[56871.519817] [drm] enabling PCIE gen 3 link speeds, disable with radeon.pcie_gen2=0
[56872.997201] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[56872.997366] radeon 0000:01:00.0: WB enabled
[56872.997370] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0xffff8800352b8c00
[56872.997373] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 0xffff8800352b8c04
[56872.997375] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 0xffff8800352b8c08
[56872.997378] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0xffff8800352b8c0c
[56872.997380] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 0xffff8800352b8c10
[56872.997383] radeon 0000:01:00.0: VCE init error (-22).
[56873.419752] [drm] ring test on 0 succeeded in 1 usecs
[56873.419758] [drm] ring test on 1 succeeded in 1 usecs
[56873.419765] [drm] ring test on 2 succeeded in 1 usecs
[56873.419777] [drm] ring test on 3 succeeded in 4 usecs
[56873.419784] [drm] ring test on 4 succeeded in 4 usecs
[56873.419908] [drm] ib test on ring 0 succeeded in 0 usecs
[56873.419951] [drm] ib test on ring 1 succeeded in 0 usecs
[56873.419991] [drm] ib test on ring 2 succeeded in 0 usecs
[56873.420040] [drm] ib test on ring 3 succeeded in 0 usecs
[56873.420060] [drm] ib test on ring 4 succeeded in 0 usecs
[56873.448640] PM: resume of devices complete after 5778.716 msecs
[56873.453722] PM: Finishing wakeup.
[56873.453724] Restarting tasks ... done.
[56873.480410] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[56873.480416] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[56873.482216] Bluetooth: hci0: rom_version status=0 version=1
[56873.735190] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[56874.437221] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[56874.439141] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[56874.450159] r8169 0000:02:00.0 enp2s0: link down
[56874.450256] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[56874.562416] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[56876.296340] wlp4s0: authenticate with 3c:8c:f8:83:e8:0c
[56876.326261] wlp4s0: send auth to 3c:8c:f8:83:e8:0c (try 1/3)
[56876.353559] wlp4s0: authenticated
[56876.356213] wlp4s0: associate with 3c:8c:f8:83:e8:0c (try 1/3)
[56876.382707] wlp4s0: RX AssocResp from 3c:8c:f8:83:e8:0c (capab=0x411 status=0 aid=3)
[56876.385118] wlp4s0: associated
[56876.385140] IPv6: ADDRCONF(NETDEV_CHANGE): wlp4s0: link becomes ready
[56906.414545] [UFW BLOCK] IN=wlp4s0 OUT= MAC=40:b8:9a:84:d6:8f:3c:8c:f8:83:e8:0c:08:00 SRC=192.168.10.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=50500 PROTO=2
[56966.322162] [UFW BLOCK] IN=wlp4s0 OUT= MAC=40:b8:9a:84:d6:8f:3c:8c:f8:83:e8:0c:08:00 SRC=192.168.10.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=50514 PROTO=2