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hattenn
Asked: 2010-12-28 03:25:19 +0800 CST

SD Card only mounted after a reboot

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I have a Kingston 2GB MicroSD and I plug it in via an inconix MicroSD Adapter to the internal card reader of my Samsung N210 Netbook with Ubuntu 10.10, but it doesn't show up. Only if I reboot the system when the card's plugged in it shows up. Why does it need a reboot for mounting?

sudo fdisk -l gives the output below. But I can only see the drive when I reboot the computer while the card's plugged.

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x9a5a7990

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        1959    15728640   27  Unknown
Partition 1 does not end on cylinder boundary.
/dev/sda2   *        1959        1972      102400    7  HPFS/NTFS
/dev/sda3            1972       18992   136718750   83  Linux
/dev/sda4           18992       19458     3738625    5  Extended
/dev/sda5           18992       19458     3738624   82  Linux swap / Solaris

Disk /dev/sdb: 1973 MB, 1973420032 bytes
60 heads, 59 sectors/track, 1088 cylinders
Units = cylinders of 3540 * 512 = 1812480 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        1089     1927100+   6  FAT16
10.10 card-reader automount

6 Answers

  1. Workaround: Try after insert sd card to slot run as root

    echo  1 > /sys/bus/pci/rescan
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  2. i found the temp solution. insert and remove card 5 times. it works on fifth time.

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  3. It is likely your card has been accessed many times, and is beginning to show its age. I've had SD cards do this often.

    Unfortunately there is not much of a "solution" - the only thing you can do really is manually mount the card (usually just a matter of going to "Computer" in nautilus, right clicking the SD card, and choosing mount).

    After looking at your output etc, it seems your adapter is faulty/being turned on after the system has been on at least once (thus only shows up on reboot - hard to explain what I mean correctly). Maybe it is a hardware problem.

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  4. This may be totally off but I had--and solved--a similar problem. If I booted my laptop (Ubuntu 10.10), the card reader wasn't recognised. However, if I rebooted with a card in the card reader, it was recognised. After much searching and head scratching, I stumbled upon the solution while enabling VMX extensions in the BIOS...

    There was an (enabled) BIOS setting to make the card reader use a 'power saving' mode. I turned off this setting and sure enough, the card reader was recognised when the machine booted; without having to insert a card at boot time.

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  5. I had a similar problem with Ubuntu 10.04 onto Acer Extensa 5620-4020. I tried different recipes but no one help me. On this PC I have also WinXP and the same SD card just works fine. Accidentally I found the solution :-) May be ( this is my simply opinion ) some timing in Linux kernel/drivers is not long enough and after years of use the contacts on SD card or contacts on the PC socket become bad. If I just push the SD card Ubuntu doesn't recognize it, BUT, if I push the card SLOWLY I always have a mounted SD card and Ubuntu pop up a window to ask me do I wish to open my digital photos with Open F-Spot. Hope this can help you.

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  6. A comparable problem happens to me on a ubuntu 18.04 virtual machine guest on a vmware host. The hardware is a Realtek USB2.0-CRW card reader. Workaround is to reload the handling module, in my case rtsx_usb_sdmmc

     sudo modprobe -r rtsx_usb_sdmmc     
 sudo modprobe rtsx_usb_sdmmc
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