Hello Rainer, The below procedure would give more information: Add the following line to the top of the file /usr/lib/pm-utils/pm-functions. export PM_DEBUG=true Then suspend with: echo 1 > /sys/power/pm_trace echo mem > /sys/power/state Post dmesg and the contents of /var/log/pm-suspend.log. Have you tried disabling the mac80211 module? Best regards, Emil Goode