Show error output when unmounting fails.
-rw-r--r-- 165 NOTES
-rw-r--r-- 1301 osd-acpi.py
-rw-r--r-- 2385 osd-hal.py
-rwxr-xr-x 6047 osd-input.py
-rwxr-xr-x 14096 osd.rb