Comment 72 for bug 925760

Running 12.04 LTS on 64-bit AMD setup with a generic USB attached Multi-card reader. With all the slots in the reader empty (CF/SD/USB etc) the following appears in kern.log and syslog, repeating the whole block approximately every 55 seconds.

Oct 26 12:59:38 chi kernel: [238967.019095] sd 8:0:0:0: [sdd] Test WP failed, assume Write Enabled
Oct 26 12:59:38 chi kernel: [238967.021168] sd 8:0:0:0: [sdd] Asking for cache data failed
Oct 26 12:59:38 chi kernel: [238967.021174] sd 8:0:0:0: [sdd] Assuming drive cache: write through

Inserting a card or stick into any of the device slots generates 6 additional lines in the logs then stops the cycle. In other words this is only a problem when the device is 'empty'

FYI - the reader does NOT appear to have any specific card sensing mechanism, either switch or sensor, built in.

Rather than blacklisting the module, which I may want to use one day, I stuck an old SD card in the reader and the logs are quiet...