How Do You Properly Disconnect USB Camera

General Help
1

I have an cheap digital camera I use for photos. I connect it to my PC via a USB cable.

My question: What is the proper method for disconnecting prior to physical removal of the USB plug from the PC in Zorin 17.3.

I have used the following:

  • From Thunar >>> right click camera picture directory and then click "Safely Remove" -- I think that works but not sure if it is actually safely removing
  • From Thunar >>> right click camera picture directory and then click "Unmount" -- I think that also works but not sure if it is actually safely unmounting
  • From Xfce terminal >>> issue the umount command, but upon further review I think this is wrong because the system may still be accessing the camera files, plus I get not properly unmounted messages when I check dmesg (sorry, lost my recent dmesg history after reboot otherwise I would post actual dmesg output)

So, thoughts -- instructions -- what's the correct method?

2

That should be fine. I mean, it is called ''Safely Remove''. That should end the Processes and then You can unplug the Camera.

1 Like
3

Let me give that a shot again and see if anything weird pops up in dmesg.

The overall issue I was having relates to the camera not being able to mount sometimes which I was was thinking might be related to improperly unmounting or removing.

Thanks

4

Still having issues with this camera...I'm thinking the "Safely Disconnect" from the Thunar might not be actually safely doing it's thing.

Anywho, below is dmesg after camera connected and then bombed out (i.e. automatically disconnected itself or was disconnected by Zorin). Hopefully all this means something to a brighter mind then mine.

Everything below happened in a matter of about 2-3 seconds, I just plugged in the camera, received the pop-up menu on the camera LCD screen to select MASS STORAGE or PC CAMERA or USB CHARGE. Selected MASS STORAGE and then the camera connected to Thunar, tried to load picture directory and then disconnected.

Any help would be appreciated.

===========

[639567.914322] usb 2-1.6: new high-speed USB device number 52 using ehci-pci
[639567.993192] usb 2-1.6: New USB device found, idVendor=1b3f, idProduct=8301, bcdDevice= 1.00
[639567.993205] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[639567.993209] usb 2-1.6: Product: GENERALPLUS-MSDC
[639567.993212] usb 2-1.6: Manufacturer: Generic USB Mass Storage Device
[639567.993215] usb 2-1.6: SerialNumber: 2016000000001
[639567.993963] usb-storage 2-1.6:1.0: USB Mass Storage device detected
[639567.994343] scsi host7: usb-storage 2-1.6:1.0
[639568.000267] usb 2-1.6: USB disconnect, device number 52
[639569.706323] usb 2-1.6: new high-speed USB device number 53 using ehci-pci
[639569.785185] usb 2-1.6: New USB device found, idVendor=1b3f, idProduct=8301, bcdDevice= 1.00
[639569.785199] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[639569.785202] usb 2-1.6: Product: GENERALPLUS-MSDC
[639569.785205] usb 2-1.6: Manufacturer: Generic USB Mass Storage Device
[639569.785208] usb 2-1.6: SerialNumber: 2016000000001
[639569.786581] usb-storage 2-1.6:1.0: USB Mass Storage device detected
[639569.789314] scsi host7: usb-storage 2-1.6:1.0
[639570.853967] scsi 7:0:0:0: Direct-Access GENPLUS USB-MSDC DISK C 1.00 PQ: 0 ANSI: 0
[639570.854940] sd 7:0:0:0: Attached scsi generic sg3 type 0
[639570.857433] sd 7:0:0:0: [sdd] 61067264 512-byte logical blocks: (31.3 GB/29.1 GiB)
[639570.858181] sd 7:0:0:0: [sdd] Write Protect is off
[639570.858187] sd 7:0:0:0: [sdd] Mode Sense: 03 00 00 00
[639570.858806] sd 7:0:0:0: [sdd] No Caching mode page found
[639570.858811] sd 7:0:0:0: [sdd] Assuming drive cache: write through
[639570.868703] sdd: sdd1
[639570.868862] sd 7:0:0:0: [sdd] Attached SCSI removable disk
[639575.748348] FAT-fs (sdd1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[639576.190515] usb 2-1.6: USB disconnect, device number 53
[639576.190830] sd 7:0:0:0: [sdd] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
[639576.190839] sd 7:0:0:0: [sdd] tag#0 CDB: Read(10) 28 00 00 00 0a 94 00 00 f0 00
[639576.190842] I/O error, dev sdd, sector 2708 op 0x0:(READ) flags 0x84700 phys_seg 240 prio class 0
[639576.191600] sd 7:0:0:0: [sdd] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
[639576.191609] sd 7:0:0:0: [sdd] tag#0 CDB: Read(10) 28 00 00 00 00 38 00 00 08 00
[639576.191611] I/O error, dev sdd, sector 56 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[639576.191643] device offline error, dev sdd, sector 2948 op 0x0:(READ) flags 0x80700 phys_seg 240 prio class 0
[639576.191797] device offline error, dev sdd, sector 2708 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.191817] FAT-fs (sdd1): FAT read failed (blocknr 2676)
[639576.193559] device offline error, dev sdd, sector 56 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193570] Buffer I/O error on dev sdd1, logical block 24, async page read
[639576.193584] device offline error, dev sdd, sector 57 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193588] Buffer I/O error on dev sdd1, logical block 25, async page read
[639576.193597] device offline error, dev sdd, sector 58 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193601] Buffer I/O error on dev sdd1, logical block 26, async page read
[639576.193610] device offline error, dev sdd, sector 59 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193613] Buffer I/O error on dev sdd1, logical block 27, async page read
[639576.193623] device offline error, dev sdd, sector 60 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193626] Buffer I/O error on dev sdd1, logical block 28, async page read
[639576.193635] device offline error, dev sdd, sector 61 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[639576.193639] Buffer I/O error on dev sdd1, logical block 29, async page read
[639576.193846] Buffer I/O error on dev sdd1, logical block 30, async page read
[639576.193860] Buffer I/O error on dev sdd1, logical block 31, async page read
[639576.379106] usb 2-1.6: new high-speed USB device number 54 using ehci-pci
[639576.462261] usb 2-1.6: New USB device found, idVendor=1b3f, idProduct=8301, bcdDevice= 1.00
[639576.462286] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[639576.462290] usb 2-1.6: Product: GENERALPLUS-MSDC
[639576.462292] usb 2-1.6: Manufacturer: Generic USB Mass Storage Device
[639576.462294] usb 2-1.6: SerialNumber: 2016000000001
[639576.463166] usb-storage 2-1.6:1.0: USB Mass Storage device detected
[639576.463423] scsi host7: usb-storage 2-1.6:1.0
[639577.509055] scsi 7:0:0:0: Direct-Access GENPLUS USB-MSDC DISK C 1.00 PQ: 0 ANSI: 0
[639577.510036] sd 7:0:0:0: Attached scsi generic sg3 type 0
[639577.513521] sd 7:0:0:0: [sdd] 61067264 512-byte logical blocks: (31.3 GB/29.1 GiB)
[639577.514478] sd 7:0:0:0: [sdd] Write Protect is off
[639577.514484] sd 7:0:0:0: [sdd] Mode Sense: 03 00 00 00
[639577.517107] sd 7:0:0:0: [sdd] No Caching mode page found
[639577.517116] sd 7:0:0:0: [sdd] Assuming drive cache: write through
[639577.528533] sdd: sdd1
[639577.528707] sd 7:0:0:0: [sdd] Attached SCSI removable disk
[639580.965287] FAT-fs (sdd1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[639588.578066] sdd: detected capacity change from 61067264 to 0
[639596.414545] usb 2-1.6: USB disconnect, device number 54
[639596.603430] usb 2-1.6: new high-speed USB device number 55 using ehci-pci
[639596.896439] usb 2-1.6: device descriptor read/64, error -71
[639597.504441] usb 2-1.6: device descriptor read/64, error -71
[639598.468640] usb 2-1-port6: Cannot enable. Maybe the USB cable is bad?
[639598.468766] usb 2-1-port6: attempt power cycle
[639599.048446] usb 2-1.6: new high-speed USB device number 57 using ehci-pci
[639599.067483] usb 2-1.6: New USB device found, idVendor=1b3f, idProduct=8301, bcdDevice= 1.00
[639599.067492] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[639599.067494] usb 2-1.6: Product: GENERALPLUS-MSDC
[639599.067497] usb 2-1.6: Manufacturer: Generic USB Mass Storage Device
[639599.067498] usb 2-1.6: SerialNumber: 2016000000001
[639599.067946] usb-storage 2-1.6:1.0: USB Mass Storage device detected
[639599.068163] scsi host7: usb-storage 2-1.6:1.0
[639600.101290] scsi 7:0:0:0: Direct-Access GENPLUS USB-MSDC DISK C 1.00 PQ: 0 ANSI: 0
[639600.101986] sd 7:0:0:0: Attached scsi generic sg3 type 0
[639600.102617] sd 7:0:0:0: [sdd] Media removed, stopped polling
[639600.103277] sd 7:0:0:0: [sdd] Attached SCSI removable disk

5

Only to understand that right: Do You have any specific Issues with the Camera?

6

The camera is 100% fine, no issues with the camera itself.

The only issue is when it tries to connect to the PC running Zorin (so that I can download pictures in USB mode to view on PC or edit, etc)...connection to PC is hit & miss. As you can see from the dmesg info in post above, it connects does all sorts of haywire stuff then disconnects itself.

7

Did You tried a different USB Port or Cable?

8

Yes, same result