dom0:mmcblk0 regularly disappearing (usb storage mounting)

[sairu...@gmail.com]

Hi fellas,

After a fresh restart, and inserting a SD card into my computer I see "mmcblk0" showing up on top of the device manager. I forward it to a Debian cube and everything works great, I can mount it no problem.

After putting my computer to sleep a couple of times however, this option stops showing up .. and thus I cannot forward it anymore, unless I restart the computer again.

All I see is new sys-usb devices appearing, but I forward those to virtual machines to no avail, I cannot mount my sd cards afterwards.

Does anyone have an idea what is wrong and how to fix it?

[dhorf-hfre...@hashmail.org]

On Thu, May 14, 2020 at 06:06:43AM -0700, sairu...@gmail.com wrote:
> Does anyone have an idea what is wrong and how to fix it?

"dom0:mmcblk0" and "usb storage" doesnt match up too well.
on this computer the dom0:mmcblk0 is a pci device entirely unrelated
to anything USB.

check what kind of device you are actualy dealing with first.


"lspci -kv" in dom0 might show something like:

00:1e.4 SD Host controller: Intel Corporation Device 9d2b (rev 21)
Kernel driver in use: sdhci-pci


or "lsusb -tv" in sys-usb might show something like:

Port 4: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
ID 05e3:0747 Genesys Logic, Inc.

[sairu...@gmail.com]

I think this is what we are looking for:

    |__ Port 11: Dev 4, If 0, Class=Chip/SmartCard, Driver=, 12M

        ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader

This, btw appears amongst the devices even after the mmcblk0 disappears, but connecting it to a cube does nothing. 

Here is the whole listing from sys-usb in case I missed something:

[user@sys-usb ~]$ lsusb -tv

/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 5000M

    ID 1d6b:0003 Linux Foundation 3.0 root hub

/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M

    ID 1d6b:0002 Linux Foundation 2.0 root hub

    |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M

        ID 0627:0001 Adomax Technology Co., Ltd 

/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M

    ID 1d6b:0002 Linux Foundation 2.0 root hub

    |__ Port 8: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M

        ID 5986:0706 Acer, Inc 

    |__ Port 8: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M

        ID 5986:0706 Acer, Inc 

    |__ Port 9: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M

        ID 138a:0090 Validity Sensors, Inc. VFS7500 Touch Fingerprint Sensor

    |__ Port 11: Dev 4, If 0, Class=Chip/SmartCard, Driver=, 12M

        ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader

    |__ Port 13: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M

        ID 0765:5010 X-Rite, Inc. X-Rite Pantone Color Sensor

    |__ Port 14: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M

        ID 8087:0a2b Intel Corp. 

    |__ Port 14: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M

        ID 8087:0a2b Intel Corp. 

On Thursday, May 14, 2020 at 7:10:25 PM UTC+2, dhorf-hfr...@hashmail.org wrote:

[sairu...@gmail.com]

This problem still persists and super annoying, I have to restart my computer nearly every time I want to use an USB storage...

I need a hand, I'm not sure what to do about this.