These warnings are output:
al@al-xfce:~$ xfce4-display-settings
(xfce4-display-settings:2148): xfce4-display-settings-CRITICAL **: xfce_randr_mode_width: assertion 'mode != NULL' failed
(xfce4-display-settings:2148): xfce4-display-settings-CRITICAL **: xfce_randr_mode_height: assertion 'mode != NULL' failed Segmentation fault (core dumped)
These warnings are output:
al@al-xfce:~$ xfce4-display- settings
(xfce4- display- settings: 2148): xfce4-display- settings- CRITICAL **: xfce_randr_ mode_width: assertion 'mode != NULL' failed
(xfce4- display- settings: 2148): xfce4-display- settings- CRITICAL **: xfce_randr_ mode_height: assertion 'mode != NULL' failed
Segmentation fault (core dumped)