On Fri 05 May 2017 at 05:34:13 +0200, Leandro Noferini wrote: > Brian <a...@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. -- Brian.
