All Brightnesses always times out

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Whenever I try to show all brightnesses, I get a timeout:

❯ RUST_BACKTRACE=full inputmodule-control led-matrix --all-brightnesses
thread 'main' panicked at inputmodule-control/src/inputmodule.rs:430:10:
Write failed!: Custom { kind: TimedOut, error: "Operation timed out" }
stack backtrace:
   0:     0x6185392f168c - <unknown>
   1:     0x6185391cfb0b - <unknown>
   2:     0x6185392c8832 - <unknown>
   3:     0x6185392f62e8 - <unknown>
   4:     0x6185392f7192 - <unknown>
   5:     0x6185392f6c85 - <unknown>
   6:     0x6185392f6be9 - <unknown>
   7:     0x6185392f6bd4 - <unknown>
   8:     0x6185390d5cd2 - <unknown>
   9:     0x6185390d60f5 - <unknown>
  10:     0x618539110333 - <unknown>
  11:     0x618539119b77 - <unknown>
  12:     0x6185390f32b3 - <unknown>
  13:     0x618539134f54 - <unknown>
  14:     0x7c3edad0ce08 - <unknown>
  15:     0x7c3edad0cecc - __libc_start_main
  16:     0x6185390de575 - <unknown>
  17:                0x0 - <unknown>