Ubuntu

MP3 player will not mount in most recent Ubuntu 16.04

Asked by Bruce MacAlister

About two months ago my MP3 player mounted to my Ubuntu 16.04 machine as a USB mass storage device. It has worked that way for two years. Yesterday I connected it again and it is not "seen" by Ubuntu on either my 64bit or my 32bit machines. Looking for diagnostic help I ran several terminal commands. Here are the results:

After connecting MP3 player

dmesg | tail
[ 56.823685] wlp2s0: authenticated
[ 56.824076] wlp2s0: associate with ec:1a:59:20:0a:f4 (try 1/3)
[ 56.825136] wlp2s0: RX AssocResp from ec:1a:59:20:0a:f4 (capab=0x411 status=0 aid=3)
[ 56.830912] wlp2s0: associated
[ 56.830991] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[ 81.857527] i2400m_usb 1-1.5:1.0: device rebooted: reinitializing driver
[ 85.137748] i2400m_usb 1-1.5:1.0: untested minor fw version 9.3.2
[ 85.137757] i2400m_usb 1-1.5:1.0: firmware interface version 9.3.2
[ 935.045866] perf interrupt took too long (2508 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
[ 2231.748970] perf interrupt took too long (5013 > 5000), lowering kernel.perf_event_max_sample_rate to 25000

susb
Bus 002 Device 003: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 8086:0186 Intel Corp. WiMAX Connection 2400m
Bus 001 Device 003: ID 064e:a219 Suyin Corp. 1.3M WebCam (notebook emachines E730, Acer sub-brand)
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Software:
SanDisk Clip Sport
Version 1.36, Memory 7852MB

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial

Linux bruce-ubuntu 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

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Bruce MacAlister
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Bruce MacAlister (w4bru) said : 		#1

It was a USB cable with power but no data connection. With a replacement USB cable the connection works as before. FYI, here's how the terminal probes look when the connection works:

 7358.237829] scsi 5:0:0:1: Direct-Access SanDisk Clip Sport PQ: 0 ANSI: 0 CCS
[ 7358.238526] sd 5:0:0:0: Attached scsi generic sg2 type 0
[ 7358.238931] sd 5:0:0:1: Attached scsi generic sg3 type 0
[ 7358.241163] sd 5:0:0:1: [sdc] Attached SCSI removable disk
[ 7358.242677] sd 5:0:0:0: [sdb] 8048640 1024-byte logical blocks: (8.24 GB/7.68 GiB)
[ 7358.243233] sd 5:0:0:0: [sdb] Write Protect is off
[ 7358.243238] sd 5:0:0:0: [sdb] Mode Sense: 00 c0 00 00
[ 7358.243682] sd 5:0:0:0: [sdb] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
[ 7358.254291] sdb:
[ 7358.259552] sd 5:0:0:0: [sdb] Attached SCSI removable disk

lsusb
Bus 002 Device 005: ID 0781:74e7 SanDisk Corp.
Bus 002 Device 003: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 8086:0186 Intel Corp. WiMAX Connection 2400m
Bus 001 Device 003: ID 064e:a219 Suyin Corp. 1.3M WebCam (notebook emachines E730, Acer sub-brand)
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub