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    Acer Aspire 5943G - Jmicron JMB380 devices disappeared (firewire and card reader)

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by swarm, Nov 20, 2012.

  1. swarm

    swarm Notebook Geek

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    Hi there! I hope there is somebody who can help me...

    I'm the less lucky guy with the worst firewire chipset ever - Jmicron JMB380. It's impossible to use it for connecting professional audio hardware but ok, I don't mind. I thought it can't be worse, but few months ago, JMB380 devices disappeared from device manager in Windows 7 and now there is no way how to bring them back to live. I don't care much about firewire now, but this chipset is shared also for card reader functionality.

    Both devices can't be probed on PCIe bus in Windows 7 (Acer preload) and Linux. I have found that JMB380 can disable itself to save an energy, so it has its own PCIe bus (PCI 4:00.0) with firewire and card reader devices. Unfortunately there are some problems reported on forums over the world (with many laptops from different vendors - DELL, Toshiba, HP, Alienware, Acer,...), but no solution.

    I tried installing different drivers but nothing changed - drivers can't find the hardware.

    I tried flashing different BIOS versions and even changed platform.ini in insyde flash module to force flash everything (and clear CMOS). No change.

    I tried booting in Linux with kernel parameter "pciehp.pcihp_force = 1" and tried sudo sh -c "echo 1 > /sys/bus/pci/rescan" command with SD card inserted. No change.


    Still I love my Acer Aspire 5943G but it's little bit uncomfortable to use an external card readers. So I hope that somebody knows the solution for my problem.

    ----

    There are some link to similar problems with JMB380:

    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/768497
    Won't stop trying to install device driver - TechSpot Forums
    SD card reader and IEEE 1394 port don't work (Qosm... - Toshiba Forums
    [SOLVED] Card reader only works if inserted at boot time - Ubuntu Forums
    HP Communities - 6460b - Event Viewer Error - JMicron PCIe SD Host ... - Enterprise Business Community
     
    swarm, Nov 20, 2012
    #1
  2. Hobgoblinpie

    Hobgoblinpie Notebook Evangelist

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    It sounds like the internal connection has come loose. Have you checked it? Aside from it being destroyed, I don't think that there are many options - From my experience at least, Windows is great at telling me when hardware isn't working (and then offering no solution, but that's a different story).
     
    Hobgoblinpie, Nov 21, 2012
    #2