On Fri 05 May 2017 at 05:34:13 +0200, Leandro Noferini wrote:
Brian <ad44@cityscape.co.uk> writes:
1. This HOWTO is a result of the discussion on debian-user beginning at
It should be stressed that the HOWTO is applicable only to devices on
the USB bus.
Thanks a lot for this document because it hits a problem I found many
months ago without solution for me. I would like to use my internal card
reader (Lenovo X240) to boot in tails (https://tails.boum.org)
I rarely dabble in hardware-related things, so a mistake or two could
creep into what follows.
My reader appears this way:
====================================================================
~ $ lsusb
Bus 001 Device 003: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
====================================================================
The Lenovo X240 has a Smart Card reader and a 4-in-1 card reader (MMC,
SD, SDHC, SDXC). The Smart Card reader is on the USB bus. I have never
used one but it appears to have something to do with identity cards.
GRUB does not detect it with nativedisk so booting from it is not
possible.
The sd card with tails on appears this way:
====================================================================
leandro@tricheco:~$ sudo fdisk /dev/mmcblk0
Welcome to fdisk (util-linux 2.29.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/mmcblk0: 7,4 GiB, 7969177600 bytes, 15564800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: F12D15CF-2FC3-4852-8226-9D4F7E625B29
Device Start End Sectors Size Type
/dev/mmcblk0p1 2048 5122047 5120000 2,5G EFI System
====================================================================
This is the 4-in-1 card reader; the one you want you are trying to boot
from. As indicted by /dev/mmcblk0p1 it is on the PCI bus. 'lspci' should
display the chip used; one from Ricoh?
GRUB doesn't see anything on this bus (it has no drivers for the device),
so booting from it is not possible.
Following your document I edited /etc/grub.d/40_custom adding these
lines:
====================================================================
menuentry 'Tails on CF card' {
insmod part_msdos
insmod ext2
echo "Running nativedisk command. Please wait."
nativedisk
search --label --set=root TAILS
linux /vmlinuz root=LABEL=TAILS ro
initrd /initrd.img
}
====================================================================
But it is not working.
If I give the "nativedisk" command in grub command line I get only
====================================================================
(ahci0)
====================================================================
Where am I wrong?
I think you have possibly not appreciated the distinction between a card
reader on a USB bus and one on a PCI bus. The first should be visible to
GRUB and nativedisk (but, as you have seen, isn't always). The second is
never visible to GRUB.