it turns out that the unresponsiveness is related to the wireless drivers for the Intel 3945 device. By keeping a terminal with: tail -f /var/log/messages
every time a new line error/warning line like these ones is added, the laptop will be unresponsive: Aug 18 16:37:56 magneto kernel: [ 451.543176] Registered led device: iwl-phy0:TX Aug 18 16:40:07 magneto kernel: [ 582.403383] Registered led device: iwl-phy0:RX Aug 18 16:40:07 magneto kernel: [ 582.403421] Registered led device: iwl-phy0:TX Aug 18 16:40:08 magneto kernel: [ 583.825808] Registered led device: iwl-phy0:RX Aug 18 16:40:08 magneto kernel: [ 583.825846] Registered led device: iwl-phy0:TX Aug 18 16:40:09 magneto kernel: [ 585.255223] Registered led device: iwl-phy0:RX Aug 18 16:40:09 magneto kernel: [ 585.255262] Registered led device: iwl-phy0:TX Aug 18 16:40:11 magneto kernel: [ 586.663210] Registered led device: iwl-phy0:RX Aug 18 16:40:11 magneto kernel: [ 586.663235] Registered led device: iwl-phy0:TX -- unresponsive external keyboard and mouse https://bugs.launchpad.net/bugs/259053 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs