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Thread: mmc0 unknown controller - you may experience problems

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  1. #1
    Join Date
    Aug 2007
    Location
    Dundee
    Beans
    633
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: mmc0 unknown controller - you may experience problems

    just come across

    https://bugs.launchpad.net/ubuntu/+bug/323159

    where it is suggested to edit /etc/modprobe.d/blacklist.conf
    and insert the following

    blacklist sdhci-pci
    blacklist sdhci
    blacklist mmc_core


    whatever this is about, the message is now gone, and the cursor doesn't blink as long as before. A message comes out right before the desktop appears, but I don't manage to pause it to read it (any suggestion how to do this on a Dell Vostro 1310 keyboard? I thought it's enough to hit "pause"...).

    More on this message as soon as I've figured out how to read that message.

  2. #2
    Join Date
    Jun 2010
    Beans
    24

    Re: mmc0 unknown controller - you may experience problems

    I have the same issue running 10.04. I have all the current updates and the install was a clean install not upgrade.

    Kernel version:

    Linux version 2.6.32-22-generic (buildd@rothera) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #33-Ubuntu SMP Wed

    On boot I see a blinking cursor for a while the error blips up on the screen then the boot splash screen starts. My kern.log has:

    ------------------------------------------
    Jun 1 19:40:59 Workstation20 kernel: [ 14.158573] sdhci: Secure Digital Host Controller Interface driver
    Jun 1 19:40:59 Workstation20 kernel: [ 14.158577] sdhci: Copyright(c) Pierre Ossman
    Jun 1 19:40:59 Workstation20 kernel: [ 14.160559] sdhci-pci 0000:03:05.2: SDHCI controller found [1217:7120] (rev 1)
    Jun 1 19:40:59 Workstation20 kernel: [ 14.160583] sdhci-pci 0000:03:05.2: PCI INT A -> Link[LNKB] -> GSI 19 (level, low) -> IRQ 19
    Jun 1 19:40:59 Workstation20 kernel: [ 14.160617] mmc0: Unknown controller version (16). You may experience problems.
    Jun 1 19:40:59 Workstation20 kernel: [ 14.160723] Registered led device: mmc0::
    Jun 1 19:40:59 Workstation20 kernel: [ 14.160778] mmc0: SDHCI controller on PCI [0000:03:05.2] using PIO
    ------------------------------------------

    My card reader still works correctly. I recently copied images from an SD card.

    I'm on an Averatec 2300 series notebook.

    I'd love to resolve the issue. More importantly find a way to speed up my boot times. It probably sits on the blinking cursor for about 15 seconds (maybe more). Which is really annoying on boot.

  3. #3
    Join Date
    Jul 2007
    Beans
    175
    Distro
    Ubuntu 14.10 Utopic Unicorn

    Re: mmc0 unknown controller - you may experience problems

    I am also having this issue. I have this thread going:
    http://ubuntuforums.org/showthread.p...58#post9590058

    Problem with the blacklist thing is that I was to use my card reader. That would block it form being used.

    God bless,
    Johnathan
    Most of us do and say dumb things, think before you act. If you do plan on going the dumb route, please be sure to have the cameras rolling... you can at least give the rest of us a good laugh.

  4. #4
    Join Date
    Oct 2009
    Location
    Kuala Lumpur
    Beans
    17
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Cool Re: mmc0 unknown controller - you may experience problems

    Aug 1 14:59:47 Ubuntu kernel: [ 22.151942] acer-wmi: Brightness must be controlled by generic video driver
    Aug 1 14:59:47 Ubuntu kernel: [ 22.156922] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000
    Aug 1 14:59:47 Ubuntu kernel: [ 22.172921] sdhci: Secure Digital Host Controller Interface driver
    Aug 1 14:59:47 Ubuntu kernel: [ 22.172924] sdhci: Copyright(c) Pierre Ossman
    Aug 1 14:59:47 Ubuntu kernel: [ 22.174435] sdhci-pci 0000:0f:06.2: SDHCI controller found [1217:7120] (rev 2)
    Aug 1 14:59:47 Ubuntu kernel: [ 22.174459] sdhci-pci 0000:0f:06.2: PCI INT A -> GSI 22 (level, low) -> IRQ 22
    Aug 1 14:59:47 Ubuntu kernel: [ 22.174485] mmc0: Unknown controller version (2). You may experience problems.
    Aug 1 14:59:47 Ubuntu kernel: [ 22.174571] Registered led device: mmc0::
    Aug 1 14:59:47 Ubuntu kernel: [ 22.174611] mmc0: SDHCI controller on PCI [0000:0f:06.2] using DMA
    I guess mmc0 is something related to multimedia controller?

  5. #5
    Join Date
    May 2009
    Location
    relative
    Beans
    365
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: mmc0 unknown controller - you may experience problems

    Quote Originally Posted by Aeric View Post
    I guess mmc0 is something related to multimedia controller?
    As mentioned above it is the card reader, (M)ulti (M)edia (C)ard.

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