Hola he comprobado y son servicios de sistemd, network y wpa-suplicant (sistemd ), lo he corregido desconectando eth0, y conectando de nuevo, ahora esta estable, sobre 8 / 10 % CPU y 610 mb de ram, con QupZilla ( 2 ) y monitor de sistema. todo O.K. hasta un nuevo reinicio que comprobaré si es por algún motivo, mi linea es buena, sobre 100mb. pero creo que tiene algo que ver que es un SSD,
Logs begin at lun 2014-06-16 00:58:31 CEST, end at lun 2014-06-16 01:24:05 CEST. --
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.357499] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.359292] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.361013] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.362626] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.364638] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.366766] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.369213] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.371993] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.374062] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.376022] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.378156] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.381406] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.383226] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.385001] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.386799] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.388600] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.390538] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.392290] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.394091] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.395854] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.397695] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
jun 16 00:58:34 kaos NetworkManager[193]: <error> [1402873114.399592] [nm-supplicant-interface.c:997] interface_add_cb(): (wlp2s0): error adding interface: w
jun 16 00:58:34 kaos NetworkManager[193]: dbus_g_proxy_cancel_call: assertion 'pending != NULL' failed
lines 1-45
Gracias.