Cannot mount USB Mass Storage Device in Canon Compact Camera and USB External Harddisks in Ubuntu 14.04 LTS

[Colin Law]

On 16 September 2014 21:25, Teo En Ming
<singapore.mr.teo.en.ming at gmail.com> wrote:
> On 17/09/2014 03:46, Colin Law wrote:
>>
>> On 16 September 2014 20:30, Teo En Ming
>> <singapore.mr.teo.en.ming at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> Recently I helped my friend assemble his desktop computer. His
>>> motherboard
>>> is the Asus H97 Pro. I installed Ubuntu 14.04 LTS on his desktop
>>> computer.
>>>
>>> Then I tried to plug in his Canon compact camera using a USB cable.
>>> Executing "dmesg" shows that the Canon compact camera was detected. But
>>> Ubuntu is unable to mount the USB mass storage device in the Canon
>>> compact
>>> camera.
>>>
>>> Subsequently, I tried to plug in his USB external harddisk. Executing
>>> "dmesg" again shows that the USB external harddisk was detected, but
>>> Ubuntu
>>> cannot mount the USB mass storage device.
>>>
>>> Is this a Ubuntu 14.04 LTS bug? Because my friend told me he can mount
>>> the
>>> Canon compact camera and USB external harddisk in Ubuntu 12.04 LTS.
>>
>> Post what you see in dmesg for the two devices.
>>
>> Colin
>>
>
> I am sorry but I don't have access to my friend's computer right now. Is the
> problem reproducible in your Ubuntu 14.04 LTS installation?

No, that is why I am asking for more details.  Hopefully there will be
a clue in the dmesg output.  In case you do not know, you can copy
from a terminal window using Ctrl-Shift-C, once you can get access to
the machine.

Colin