Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: SD card reader for Acer AO756

  1. #1
    Join Date
    Jul 2012
    Beans
    15

    SD card reader for Acer AO756

    I'm running xubuntu 12.04 on my Acer 756 netbook; everything works except for the sdcard: It does not show up under lspci (I tried to boot with or without the sdcard inserted). It does work in window 7. After some digging I found this thread

    http://ubuntuforums.org/showthread.php?t=1506925&page=2

    (note that this thread is for the atom netbook whereas the 756 is bascially sandy bridge, which is why I start a new thread). I tried the various suggestions in that thread but none works. The suggestions in post #70 there does help a bit:

    (1) edit /etc/default/grub with

    GRUB_CMDLINE_LINUX_DEFAULT="pciehp.pciehp_force=1 pciehp.pciehp_poll=1 elevator=noop quiet splash"

    (2) add to /etc/moduels

    pciehp
    And if you reboot the machine WITH THE SDCARD then it works! And lspci gives

    04:00:1 SD Host controller: Broadcom Corporation Nextreme BCM57765 Memory Card Reader (Rev 10)

    Unfortunately, if you umount the card and reinsert it the card is not longer recognized.

    This is driving me crazy... any help and suggestion is most appreciative!

  2. #2
    Join Date
    Aug 2012
    Beans
    3

    Re: SD card reader for Acer AO756

    I'm having the same problem. After inserting a card all I see is this message repeating in the kernel log

    Code:
    mmc0: Timeout waiting for hardware interrupt.
    A strange workaround I've found is to reload the tg3 network driver while the card is inserted, perhaps the two devices share some parts in the broadcom chip and need special care?

    Code:
    rmmod tg3; modprobe tg3

  3. #3
    Join Date
    Jul 2012
    Beans
    15

    Re: SD card reader for Acer AO756

    I just discovered something interesting: If I boot the xubuntu 12.04 live CD *without* an sdcard plugged in, the sdcard reader works fine -- I can hotplug/unplug sdcards at will and the card reader works. But

    * you need to install the Broadcomm restricted drivers

    * it takes 3-4 seconds for the sdcard to be recognized, whereas usb thumb drivers work right away

    * I've booted this several times to be sure, and the system crahsed once when I plug/unplug 3-4 times in a roll (and since I'm running this off live CD I don't know how to make a log)

    * when I revert back to normal boot from hdd then the sdcard reader fails again...

    This is so weird... Suggestions and comments are most welcome!

  4. #4
    Join Date
    Jul 2012
    Beans
    15

    Re: SD card reader for Acer AO756

    Quote Originally Posted by bee4oo View Post
    A strange workaround I've found is to reload the tg3 network driver while the card is inserted, perhaps the two devices share some parts in the broadcom chip and need special care?

    Code:
    rmmod tg3; modprobe tg3
    Thanks for the update. I tried this on my 756 and I got this error message: > sudo rmmod t3g; sudo modprobe t3g > ERROR: Module t3g does not exist in /proc/modules > FATAL: Module t3g not found The weird thing is that when I type "more /etc/modules" I got > tg3 152032 0 - Live 0x(log string of zeros) Puzzles...

  5. #5
    Join Date
    Aug 2012
    Beans
    3

    Re: SD card reader for Acer AO756

    Quote Originally Posted by saou View Post
    sudo rmmod t3g; sudo modprobe t3g > ERROR: Module t3g does not exist in /proc/modules > FATAL: Module t3g not found
    The module's name is tg3, not t3g. Or does it fail even with tg3?

  6. #6
    Join Date
    Aug 2012
    Beans
    3

    Re: SD card reader for Acer AO756

    Perhaps this patch will fix the problem?

    http://patchwork.ozlabs.org/patch/174095/

  7. #7
    Join Date
    Aug 2012
    Beans
    7

    Re: SD card reader for Acer AO756

    I have just ordered an Acer like this.
    I hope I won't have such troubles, though I am planning to stick with Ubuntu 10.10.

  8. #8
    Join Date
    Jul 2012
    Beans
    15

    Re: SD card reader for Acer AO756

    Quote Originally Posted by bee4oo View Post
    Perhaps this patch will fix the problem?

    http://patchwork.ozlabs.org/patch/174095/
    Interesting! Questions:

    (1) This patch seems (?) to address the issue of reactivating the card reader after the user ejects a sdcard. But what about recognizing the sdcard after a freshboot (without the card already plugged in)?

    (2) How do we apply/test this patch?

    Thanks!
    p.s. Thanks for noting the typo in post #4; I'm travelling now; I will test that again as soon as I get home...

  9. #9
    Join Date
    Nov 2012
    Beans
    1

    Re: SD card reader for Acer AO756

    Quote Originally Posted by saou View Post
    Interesting! Questions:

    (1) This patch seems (?) to address the issue of reactivating the card reader after the user ejects a sdcard. But what about recognizing the sdcard after a freshboot (without the card already plugged in)?

    (2) How do we apply/test this patch?

    Thanks!
    p.s. Thanks for noting the typo in post #4; I'm travelling now; I will test that again as soon as I get home...
    Has anyone tried installing the patch? I'm not sure where to place it before running it.

  10. #10
    Join Date
    Feb 2013
    Beans
    5

    Re: SD card reader for Acer AO756

    hi everybody,
    i'm having the same problem with my memory card reader. i don't know if i'm wrong but
    dmesg in /var/log tells me:
    tg3.c:v3.121
    seems to be the version number.

    broadcom offers a driver download at https://www.broadcom.com/support/eth...me_desktop.php
    unzipping the linux driver says the version is v3.124c

    so probably installing this could help?
    am i right if i follow the steps in the README.TXT with the non-rpm installation?

    regards
    mtambo

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •