[Bug 2106499] Re: Installation fails with 'OSError: [Errno 16] Device or resource busy: '/dev/mmcblk1p3'' (target device contains the installer)

[Heinrich Schuchardt]

The appended screenshot shows that subiquity is preselecting the SD-card
instead of the eMMC as installation target which does not make any sense
as installation to the SD-card is bound to fail.

Furthermore only serial numbers are shown without any indication which
of the devices is thge eMMC and which is the SD-card.

Both needs fixing.

** Attachment added: "Screenshot_20250414_111928.png"
   https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2106499/+attachment/5871654/+files/Screenshot_20250414_111928.png

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Title:
  Installation fails with 'OSError: [Errno 16] Device or resource busy:
  '/dev/mmcblk1p3'' (target device contains the installer)

Status in subiquity package in Ubuntu:
  New

Bug description:
  I tried to install http://cdimage.ubuntu.com/ubuntu-server/daily-
  live/20250408/plucky-live-server-riscv64.iso on a StarFive VisionFive
  2 board with eMMC. Curtin failed with:

  File "/snap/subiquity/6584/lib/python3.12/site-packages/curtin/block/__init__.py", line 1120, in exclusive_open
              fd = os.open(path, flags)
                   ^^^^^^^^^^^^^^^^^^^^
          OSError: [Errno 16] Device or resource busy: '/dev/mmcblk1p3'

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