Thanks for pointing me to the Mainline Builds. When I tried to install "linux-headers-3.18.0-031800rc1-generic_3.18.0-031800rc1.201410192135_i386.deb" et.al. I ran into the problem described in #1358966. I'm not sure if the proposed patch would help to solve my problem - after further debugging it seems that the pure hardware itself seems to be recognized, but a wireless network connection cannot be established: Oct 24 22:35:04 box NetworkManager[804]: Activation (wlan0) Stage 2 of 5 (Device Configure) starting... Oct 24 22:35:04 box NetworkManager[804]: (wlan0): device state change: prepare -> config (reason 'none') [40 50 0] Oct 24 22:35:04 box NetworkManager[804]: Activation (wlan0/wireless): connection 'SSID' has security, and secrets exist. No new secrets needed. Oct 24 22:35:04 box NetworkManager[804]: Config: added 'ssid' value 'SSID' Oct 24 22:35:04 box NetworkManager[804]: Config: added 'scan_ssid' value '1' Oct 24 22:35:04 box NetworkManager[804]: Config: added 'key_mgmt' value 'WPA-PSK' Oct 24 22:35:04 box NetworkManager[804]: Config: added 'psk' value '' Oct 24 22:35:04 box NetworkManager[804]: Activation (wlan0) Stage 2 of 5 (Device Configure) complete. Oct 24 22:35:04 box NetworkManager[804]: Config: set interface ap_scan to 1 Oct 24 22:35:05 box NetworkManager[804]: (wlan0): supplicant interface state: inactive -> scanning Oct 24 22:35:30 box NetworkManager[804]: Activation (wlan0/wireless): association took too long, failing activation. Oct 24 22:35:30 box NetworkManager[804]: (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53] Oct 24 22:35:30 box NetworkManager[804]: NetworkManager state is now DISCONNECTED Oct 24 22:35:30 box NetworkManager[804]: Activation (wlan0) failed for connection 'SSID' Oct 24 22:35:30 box NetworkManager[804]: (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0] Oct 24 22:35:30 box NetworkManager[804]: (wlan0): deactivating device (reason 'none') [0] Oct 24 22:35:30 box NetworkManager[804]: (wlan0): supplicant interface state: scanning -> disconnected Oct 24 22:35:30 box NetworkManager[804]: Couldn't disconnect supplicant interface: This interface is not connected. Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) starting connection 'HOME' Oct 24 22:36:09 box NetworkManager[804]: (wlan0): device state change: disconnected -> prepare (reason 'none') [30 40 0] Oct 24 22:36:09 box NetworkManager[804]: NetworkManager state is now CONNECTING Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 1 of 5 (Device Prepare) started... Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 2 of 5 (Device Configure) starting... Oct 24 22:36:09 box NetworkManager[804]: (wlan0): device state change: prepare -> config (reason 'none') [40 50 0] Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0/wireless): connection 'HOME' has security, and secrets exist. No new secrets needed. Oct 24 22:36:09 box NetworkManager[804]: Config: added 'ssid' value 'SSID' Oct 24 22:36:09 box NetworkManager[804]: Config: added 'scan_ssid' value '1' Oct 24 22:36:09 box NetworkManager[804]: Config: added 'key_mgmt' value 'WPA-PSK' Oct 24 22:36:09 box NetworkManager[804]: Config: added 'psk' value '' Oct 24 22:36:09 box NetworkManager[804]: Activation (wlan0) Stage 2 of 5 (Device Configure) complete. Oct 24 22:36:09 box NetworkManager[804]: Config: set interface ap_scan to 1 Oct 24 22:36:09 box NetworkManager[804]: (wlan0): supplicant interface state: disconnected -> scanning Oct 24 22:36:34 box NetworkManager[804]: Activation (wlan0/wireless): association took too long, failing activation. Oct 24 22:36:34 box NetworkManager[804]: (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53] Oct 24 22:36:34 box NetworkManager[804]: NetworkManager state is now DISCONNECTED Oct 24 22:36:34 box NetworkManager[804]: Activation (wlan0) failed for connection 'HOME' Oct 24 22:36:34 box NetworkManager[804]: (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0] Oct 24 22:36:34 box NetworkManager[804]: (wlan0): deactivating device (reason 'none') [0] Oct 24 22:36:34 box NetworkManager[804]: (wlan0): supplicant interface state: scanning -> disconnected After rebooting into the new kernel the trackpad did not work and due to the missing module no WLAN was available.