Public bug reported:

When inserting an SDHC card into the Ricoh e823 card reader on my
Thinkpad T420s, the card is not mounted and the block device is never
created.  There is a similar bug #773524, but the workaround provided
there and the updated kernel version haven't solved my problem. I would
love to help get this solved and am willing and able to test various
solutions.

In dmesg,  I see "mmc0: error -110 whilst initialising SD card" after
inserting the card.

tom@whaam ~ $ sudo lspci -v -d 1180:e823
05:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 07)
        Subsystem: Lenovo Device 21d2
        Flags: bus master, fast devsel, latency 0, IRQ 10
        [virtual] Memory at d0d00000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Power Management version 3
        Capabilities: [80] Express Endpoint, MSI 00
        Capabilities: [100] Virtual Channel
        Capabilities: [800] Advanced Error Reporting
        Kernel driver in use: sdhci-pci
        Kernel modules: sdhci-pci

For reference, this is what happens when I run the workaround in comment
#13 on bug #773524
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/773524/comments/13):

Mar 26 00:04:15 whaam kernel: [  413.265533] sdhci: Secure Digital Host 
Controller Interface driver
Mar 26 00:04:15 whaam kernel: [  413.265535] sdhci: Copyright(c) Pierre Ossman
Mar 26 00:04:15 whaam kernel: [  413.271153] sdhci-pci 0000:05:00.0: SDHCI 
controller found [1180:e823] (rev 4)
Mar 26 00:04:15 whaam kernel: [  413.271232] sdhci-pci 0000:05:00.0: found PCI 
INT A -> IRQ 10
Mar 26 00:04:15 whaam kernel: [  413.271241] sdhci-pci 0000:05:00.0: sharing 
IRQ 10 with 0000:00:16.3
Mar 26 00:04:15 whaam kernel: [  413.271256] sdhci-pci 0000:05:00.0: sharing 
IRQ 10 with 0000:00:1c.3
Mar 26 00:04:15 whaam kernel: [  413.271757] sdhci-pci 0000:05:00.0: setting 
latency timer to 64
Mar 26 00:04:15 whaam kernel: [  413.271793] mmc0: no vmmc regulator found
Mar 26 00:04:15 whaam kernel: [  413.271832] Registered led device: mmc0::
Mar 26 00:04:15 whaam kernel: [  413.272094] mmc0: SDHCI controller on PCI 
[0000:05:00.0] using DMA
Mar 26 00:05:08 whaam kernel: [  465.984670] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:08 whaam kernel: [  466.439245] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:09 whaam kernel: [  466.614932] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:09 whaam kernel: [  466.777559] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:09 whaam kernel: [  466.946194] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:09 whaam kernel: [  467.115316] mmc0: error -110 whilst 
initialising SD card
Mar 26 00:05:09 whaam kernel: [  467.290641] mmc0: error -110 whilst 
initialising SD card

Additional info:

tom@whaam ~ $ cat /proc/version_signature 
Ubuntu 3.0.0-16.29-generic 3.0.20

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/965280

Title:
  Thinkpad T420s - Ricoh e823 not working with SDHC cards (11.10)

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