config.txt is missing the '[cm4]' section which loads the dwc2 overlay.
Note that this is IO board specific as the USB controller lives on the
IO board and not the CM4. It's not a kernel problem, the image is
broken.
** Changed in: linux-raspi (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2052783
Title:
Cannot detect external storage with Ubuntu Core 20 on CM4
Status in linux-raspi package in Ubuntu:
Invalid
Bug description:
External USB storage is not detected when running the beta Ubuntu Core
20 image [0] on CM4. Same happens with the armhf image.
The issue has been discovered using Checkbox - the failing test is
usb/storage-detect [1].
Step to reproduce:
- Provision the CM4 with [0]
- Plug a USB storage device
- Check such device is recognized and listed under /dev/sd*
The issue is not present when running Core 22 [2] instead.
[0]
http://cdimage.ubuntu.com/ubuntu-core/20/dangerous-stable/current/ubuntu-core-20-arm64+raspi.img.xz
[1]
https://github.com/canonical/checkbox/blob/d070c640bccf664c0882583c1dc0d3a0d1fdb7b8/providers/base/units/usb/usb.pxu#L311
[2]
http://cdimage.ubuntu.com/ubuntu-core/22/dangerous-stable/pending/ubuntu-core-22-arm64+raspi.img.xz
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