Comment 68 for bug 925760

I am running ubuntu 12.04 LTS 64 bit on a Dell Vostro 3550 and I have experienced this issue as well. However, the problem has been SOLVED by simply removing the factory installed dummy from the SD slot. Apparently, the relevant driver is designed to detect a SD module via the slot plug-in switch activation. As such, any object with the right shape that could activate this switch will be detected as a valid SD module. The ensuing syslog messages are a result of the automout trying (every ~ 45 seconds) to mount what is in fact an invalid device.

Should these messages be generated with an empty SD slot, I would suspect the slot plug-in switch to be faulty ("on" all the time).

Consequently, I do not believe this to be a kernel bug, although it may be possible to find a more reliable way to detect a valid SD module for the device driver.

Regards