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56 lines
2.0 KiB
Markdown
56 lines
2.0 KiB
Markdown
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---
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title: Card Reader of the Acer Aspire One
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layout: default
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created: 2008-10-04 13:15:04 +0200
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updated: 2009-12-29 15:58:15 +0100
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toc: false
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tags:
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- know-how
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- hardware
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- acer
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- aspire
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- cardreader
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---
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**Model:** [JMicron JMB38x](http://www.jmicron.com/Product_JMB38X.htm) PCI Express to 1394a OHCI and Memory Card Host Controller
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<p><div class="notetip" markdown="1">
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Since *Ubuntu Karmic Koala*, the card reader seems to be recognized fine - but only, **if there is a card inserted upon bootup**.
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</div></p>
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Enabling the device
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===================
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The cardreader device seems to be hidden on bootup and you have to enable it by issuing:
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setpci -d 197b:2381 AE=47
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This didn't work on the commandline but inside the `rc.local`, my 16GiB SDcard in the left slot was recognized fine.
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Multicard-reader driver
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=======================
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The right-hand SD slot is actually a multi-card reader for MMC, SD, xD and MemoryStick. This device doesn't seem to be
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recognized by my Ubuntu.
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There's a project called [TI FlashMedia xx12/xx21 driver](http://tifmxx.berlios.de) which also contains the kernel
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modules for the jmb38x. The Linpus Linux on the A150L loads modules with exactly those names: `jmb38x_xd`,
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`flash_bd`, `memstick`, `mspro_block`, `xd_card` and `jmb38x_ms`.
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The [UbuntuForums](http://ubuntuforums.org/showpost.php?p=5778068&postcount=70) contain a HowTo for installing the
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TI-part of that driver. I proceeded the same way but installed those modules mentioned above instead of the TI ones.
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Modprobing them on command-line worked fine, but after adding the modprobes to the `rc.local`, the next boot ended up
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in continuous *soft lockups*.
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So make sure you keep an USB stick with the [SysRescCD](http://www.sysresccd.org/Sysresccd-manual-en_How_to_install_SystemRescueCd_on_an_USB-stick) handy.
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*[PCI]: Peripheral Component Interconnect
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*[OHCI]: Open Host Controller Interface
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*[MMC]: MultiMediaCard
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*[SD]: Secure Digital
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*[xD]: xD-Picture Card
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*[TI]: Texas Instruments
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*[USB]: Universal Serial Bus
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