[SOLVED] Can't read SD card (no medium found)

[daaaaang]

The SD card reader completely works with the install CD from April 21 (2.6.37-gentoo-r4):

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# uname -a
Linux livecd 2.6.37-gentoo-r4 #1 SMP Thu Apr 21 13:22:25 \
    UTC 2011 x86_64 Intel(R) Core(TM) i3 CPU M 370 @ 2.40GHz \
    GenuineIntel GNU/Linux

Here is what dmesg has to say when I insert the card:

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# dmesg | tail -n 17
usb 1-1.4: new high speed USB device using ehci_hcd and address 6
usb 1-1.4: New USB device found, idVendor=058f, idProduct=6366
usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1.4: Product: Mass Storage Device
usb 1-1.4: Manufacturer: Generic
usb 1-1.4: SerialNumber: 058F63666433
scsi6 : usb-storage 1-1.4:1.0
scsi 6:0:0:0: Direct-Access     Multiple Card  Reader     1.00 PQ: 0 ANSI: 0
sd 6:0:0:0: Attached scsi generic sg1 type 0
sd 6:0:0:0: [sdb] 3962880 512-byte logical blocks: (2.02 GB/1.88 GiB)
sd 6:0:0:0: [sdb] Write Protect is off
sd 6:0:0:0: [sdb] Mode Sense: 03 00 00 00
sd 6:0:0:0: [sdb] Assuming drive cache: write through
sd 6:0:0:0: [sdb] Assuming drive cache: write through
 sdb: sdb1
sd 6:0:0:0: [sdb] Assuming drive cache: write through
sd 6:0:0:0: [sdb] Attached SCSI removable disk

Here is what fdisk has to say about it:

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# fdisk -l /dev/sdb

Disk /dev/sdb: 2028 MB, 2028994560 bytes
55 heads, 54 sectors/track, 1334 cylinders, total 3962880 sectors
Units = sectors of 1 * 512 = 512 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             251     3962879     1981314+   6  FAT16

It mounts and umounts just fine, and the data is not corrupted. Here's what dmesg says when I remove the card:

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# dmesg | tail -n 1
usb 1-1.4: USB disconnect, address 6

This is all great, except it does not happen when I boot from my hard
drive instead:

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# uname -a
Linux hazel 2.6.39-gentoo #14 SMP PREEMPT Mon May 23 \
    08:10:50 EDT 2011 x86_64 Intel(R) Core(TM) i3 CPU \
    M 370 @ 2.40GHz GenuineIntel GNU/Linux

Here's what dmesg has to say about it:

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# dmesg | tail -n 19
[  393.198642] hub 1-1:1.0: state 7 ports 6 chg 0000 evt 0010
[  393.198912] hub 1-1:1.0: port 4, status 0101, change 0001, 12 Mb/s
[  393.303147] hub 1-1:1.0: debounce: port 4: total 100ms stable 100ms status 0x101
[  393.314099] hub 1-1:1.0: port 4 not reset yet, waiting 10ms
[  393.376004] usb 1-1.4: new high speed USB device number 5 using ehci_hcd
[  393.386979] hub 1-1:1.0: port 4 not reset yet, waiting 10ms
[  393.461658] usb 1-1.4: default language 0x0409
[  393.462448] usb 1-1.4: udev 5, busnum 1, minor = 4
[  393.462454] usb 1-1.4: New USB device found, idVendor=058f, idProduct=6366
[  393.462460] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  393.462465] usb 1-1.4: Product: Mass Storage Device
[  393.462469] usb 1-1.4: Manufacturer: Generic
[  393.462473] usb 1-1.4: SerialNumber: 058F63666433
[  393.462571] usb 1-1.4: usb_probe_device
[  393.462574] usb 1-1.4: configuration #1 chosen from 1 choice
[  393.462784] usb 1-1.4: adding 1-1.4:1.0 (config #1, interface 0)
[  393.462819] ub 1-1.4:1.0: usb_probe_interface
[  393.462822] ub 1-1.4:1.0: usb_probe_interface - got id
[  394.737464] drivers/usb/core/inode.c: creating file '005'

The only device that appears is /dev/uba, but:

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# fdisk -l /dev/uba
# fdisk /dev/uba
fdisk: unable to open /dev/uba: No medium found

In case it isn't obvious, /dev/uba1 never even shows up. Here is the
dmesg when I remove it:

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# dmesg | tail -n 7
[ 1720.604265] hub 1-1:1.0: state 7 ports 6 chg 0000 evt 0010
[ 1720.604675] hub 1-1:1.0: port 4, status 0100, change 0001, 12 Mb/s
[ 1720.604801] usb 1-1.4: USB disconnect, device number 5
[ 1720.604807] usb 1-1.4: unregistering device
[ 1720.604812] usb 1-1.4: unregistering interface 1-1.4:1.0
[ 1720.609300] usb 1-1.4: usb_disable_device nuking all URBs
[ 1720.713260] hub 1-1:1.0: debounce: port 4: total 100ms stable 100ms status 0x100

And, of course, /dev/uba disappears.

In anticipation of questions about the kernel, here are a few pieces of my kernel:

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SCSI device support  --->
< > RAID Transport Class
-*- SCSI device support
< > SCSI target support
[*] legacy /proc/scsi/ support
    *** SCSI support type (disk, tape, CD-ROM) ***
<*> SCSI disk support
< > SCSI tape support
< > SCSI OnStream SC-x0 tape support
<*> SCSI CDROM support
[*]   Enable vendor-specific extensions (for SCSI CDROM)
<*> SCSI generic support
< > SCSI media changer support
[*] Probe all LUNs on each SCSI device
[*] Verbose SCSI error reporting (kernel size +=12K)
[ ] SCSI logging facility
[*] Asynchronous SCSI scanning
    SCSI Transports  --->
[ ] SCSI low-level drivers  --->
< > SCSI Device Handlers  --->
< > OSD-Initiator library

[*] USB support  --->
<*>   USB Mass Storage support
[*]     USB Mass Storage verbose debug
<M>     Realtek Card Reader support
<M>     Datafab Compact Flash Reader support
<M>     Freecom USB/ATAPI Bridge support
<M>     ISD-200 USB/ATA Bridge support
<M>     USBAT/USBAT02-based storage support
<M>     SanDisk SDDR-09 (and other SmartMedia, including DPCM) support
<M>     SanDisk SDDR-55 SmartMedia support
<M>     Lexar Jumpshot Compact Flash Reader
<M>     Olympus MAUSB-10/Fuji DPC-R1 support
<M>     Support OneTouch Button on Maxtor Hard Drives
<M>     Support for Rio Karma music player
<M>     SAT emulation on Cypress USB/ATA Bridge with ATACB
<M>     USB ENE card reader support
<*>   USB Attached SCSI

<*> MMC/SD/SDIO card support  --->
[*]   MMC debugging
[ ]   Assume MMC/SD cards are non-removable (DANGEROUS)
[ ]   MMC host clock gating (EXPERIMENTAL)
      *** MMC/SD/SDIO Card Drivers ***
<*>   MMC block device driver
(8)     Number of minors per block device
[*]     Use bounce buffer for simple hosts
< >   SDIO UART/GPS class support
< >   MMC host test driver
      *** MMC/SD/SDIO Host Controller Drivers ***
<M>   Secure Digital Host Controller Interface support
<M>   SDHCI support on PCI bus
[ ]     Ricoh MMC Controller Disabler  (EXPERIMENTAL)
<M>   SDHCI support on the platform specific bus
<M>   Winbond W83L51xD SD/MMC Card Interface support
<M>   TI Flash Media MMC/SD Interface support  (EXPERIMENTAL)
<M>   ENE CB710 MMC/SD Interface support
<M>   VIA SD/MMC Card Reader Driver
<M>   USB SD Host Controller (USHC) support

<*> Sony MemoryStick card support (EXPERIMENTAL)  --->
[*]   MemoryStick debugging
      *** MemoryStick drivers ***
[ ]   Allow unsafe resume (DANGEROUS)
<M>   MemoryStick Pro block device driver
      *** MemoryStick Host Controller Drivers ***
<M>   TI Flash Media MemoryStick Interface support  (EXPERIMENTAL)
<M>   JMicron JMB38X MemoryStick interface support (EXPERIMENTAL)
<M>   Ricoh R5C592 MemoryStick interface support (EXPERIMENTAL)

Any ideas?

Thanks for reading; let me know if there's anything I missed!
Matt

[edit -- added "SOLVED"]

[BradN]

Does this problem also occur with, for example, usb flash drives, or usb hard drives? (testing one or the other should be enough)

[daaaaang]

No -- both work fine in all three USB ports (two USB 2 ports and one USB 3).

If it means anything, USB drives also appear as /dev/ubx.

[BradN]

Figured it out: You're using an alternate USB mass storage driver that doesn't support certain things.

Turn it off inside Device Drivers > Block Devices

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CONFIG_BLK_DEV_UB:

  │ This driver supports certain USB attached storage devices
  │ such as flash keys.

  │ If you enable this driver, it is recommended to avoid conflicts
  │ with usb-storage by enabling USB_LIBUSUAL.  

  │ If unsure, say N.

  │ Symbol: BLK_DEV_UB [=n]
  │ Type  : tristate
  │ Prompt: Low Performance USB Block driver
  │   Defined at drivers/block/Kconfig:328
  │   Depends on: BLK_DEV [=y] && USB [=y]
  │   Location:
  │     -> Device Drivers
  │       -> Block devices (BLK_DEV [=y])

[daaaaang]

That was completely it. Thank you Brad!