Comment # 5 on bug 1007652 from Oliver Neukum

You are seeing a conflict between the kernel and brltty, which comes in the
package brltty-5.4-1.1.x86_64. Due to the following rule it claims an lot of
devices:

# BEGIN_USB_DEVICES

# Device: 0403:6001
# Generic Identifier
# Vendor: Future Technology Devices International, Ltd
# Product: FT232 USB-Serial (UART) IC
# Albatross [all models]
# Cebra [all models]
# HIMS [Sync Braille]
# HandyTech [FTDI chip]
# MDV [all models]
ENV{PRODUCT}=="403/6001/*", ENV{BRLTTY_BRAILLE_DRIVER}="at,ce,hm,ht,md",
GOTO="brltty_usb_run"

If you deinstall the package, it will work again, but that is no permanent
solution for the issue.