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 21:51, Teo En Ming
<singapore.mr.teo.en.ming at gmail.com> wrote:
> On 17/09/2014 04:34, Colin Law wrote:
>>
>> 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
>>
>
> Dear Colin,
>
> As far as I can recall, Ubuntu failed to create device nodes. That's why it
> cannot mount the USB mass storage devices automatically.

That may be enough for someone to help, but I think we will need the
actual messages.

Colin