This is said to avoid a race with the usbhid kernel module.
See <https://issues.guix.gnu.org/35574#18>.
* gnu/system.scm (%default-modprobe-blacklist): Blacklist it.
(define %default-modprobe-blacklist
;; List of kernel modules to blacklist by default.
- '("usbmouse")) ;see <https://bugs.gnu.org/35574>
+ '("usbmouse" ;races with bcm5974, see <https://bugs.gnu.org/35574>
+ "usbkbd")) ;races with usbhid, see <https://issues.guix.gnu.org/35574#18>
(define %default-kernel-arguments
;; Default arguments passed to the kernel.