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I'm currently running Ubuntu 14.04 LTS on a Dell XPC 8700 Desktop. Sometime in the past the past 6 weeks or so my desktop no longer recognizes my compact flash drive(s). When I insert a SD card nothing happens anymore. I've looked at the "Disks" application and the icons for the various usb CF drives are there but nothing appears to happen when I insert or remove a card.

I've tried manually mounting /dev/sdd (per information from Disks) but I only get an error message:

mount: no medium found on /dev/sdd

(the card is inserted fully). I've also tried /dev/sdc, /dev/sde and /dev/sdf on the off chance that something isn't configured right but the same error message appears.

When I enter sudo fdisk -l from the command line I get information about my hard drives /dev/sda /dev/sdb; /dev/mapper/ubuntu--vg-root and /dev/mapper/ubuntu--vg-swap_1 even though I have an SD card inserted. I assume that something has happened as a result of the recent updates over the past few weeks but now I have no clue how to fix this problem.

I assume that the problem started with one or more of the updates I've installed over the past 4-6 weeks (maybe more) since I've made no other changes to my system. Does anybody have any suggestions???? I desperately need to get this fixed ASAP!!!

Neil
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Tim Jensen
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1 Answers1

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If you are sure that the hardware itself is not an issue;

Run 

$ dmesg -T | tail

The -T option prints human readable timestamps.

Insert the device and run

$ dmesg -T | tail

again and see if anything has changed in the output. If your computer sees the new device, you will find a note of it here. This will include a /dev/sd? you can use to try and manually mount it somewhere, but be warned

$ sudo mount /dev/sdd /mnt

is an attempt to mount the raw disk as opposed to, say, the first partition like:

$ sudo mount /dev/sdd1 /mnt

If this still doesn't help, here are some more powerful tools to investigate. How to detect an USB device?

Community
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user387334
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