Caused by Windows' Fast Boot and affects all NTFS drives. Disable it in Windows settings and restart.
Temporary Fix:
sudo ntfsfix /dev/sdc1
https://bugzilla.xfce.org/show_bug.cgi?id=10725
When using multiple displays
Automated script:
#!/bin/bash -e
# Workaround for https://bugzilla.xfce.org/show_bug.cgi?id=10725
# AKA https://bugzilla.redhat.com/show_bug.cgi?id=1068355
# Author: Sean Flanigan <sflaniga@redhat.com>
# This shows which plugins need to have their config fixed:
# xfconf-query -c xfce4-panel -lv | grep tasklist
# also see: xfconf-query -c xfce4-panel -lv | egrep 'tasklist|include-all-monitors'
# and: xfconf-query -c xfce4-panel -l | grep include-all-monitors
plugins=$(xfconf-query -c xfce4-panel -lv | grep tasklist | cut -f1 -d' ')
for plugin in $plugins; do
xfconf-query -c xfce4-panel -p $plugin/include-all-monitors -s true
xfconf-query -c xfce4-panel -p $plugin/include-all-monitors -s false
done
echo Configured these taskbar plugins: $plugins