Arch Linux

abc12345

Member

Registered: 2022-03-30

Posts: 57

usb block device not lettered by a plugged in kernel event

When plugged in, a USB drive gets detected by both kernel and udev judging by the events seen through 'udevadm monitor'.
But one line doesn't show up in dmesg that says such and such "sdX" assigned. And a block device node not created in /dev (mknod works manually to create it).
I know it's a kernel issue because when I jump to a default kernel everything works fine, a /dev/sdx device node is created automatically. What kernel config would be responsible for this? Thanks.

Last edited by abc12345 (2022-03-31 00:04:56)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,285

Re: usb block device not lettered by a plugged in kernel event

That's normally the usb_storage module that handles this and this error can happen if you didn't yet reboot after a kernel update. If it still happens despite a reboot, check with uname -a and pacman -Q linux or whatever your kernel package is that you are actually booting the version you think you are booting.

abc12345

Member

Registered: 2022-03-30

Posts: 57

Re: usb block device not lettered by a plugged in kernel event

It was the USB Mass Storage kernel config line. Thank you!