беспроводная связь, отключающая после приостановки

Я сделал новую установку xubuntu 16.04.2 недавно, и теперь беспроводная связь просто, кажется, прекращает работать наугад. До сих пор это, кажется, во время сессии после выхода из приостановки, хотя не прямо после, обычно как час или два позже. Перезагрузка фиксирует его некоторое время. Существуют также проблемы с зависанием и курсором мыши, исчезающим после приостановки. sudo lshw C- network показывает отключенный драйвер беспроводного устройства:

*-network DISABLED      
       description: Wireless interface
       product: PRO/Wireless 3945ABG [Golan] Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:0c:00.0
       logical name: wlp12s0
       version: 02
       serial: 00:1f:3c:7d:32:5d
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwl3945 driverversion=4.8.0-41-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:29 memory:fe8ff000-fe8fffff

iwconfig говорит:

lo        no wireless extensions.

wlp12s0   IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

enp9s0    no wireless extensions.

и dmesg распечатал это с некоторыми предупреждениями/ошибками после того, как соединение отбросило..., я действительно не знаю то, что означает любой из него:

[22706.141103] WARNING: CPU: 1 PID: 5083 at /build/linux-hwe-bZV_oZ/linux-hwe-4.8.0/net/mac80211/driver-ops.c:39 drv_stop+0xfa/0x100 [mac80211]
[22706.141104] Modules linked in: hid_generic usbhid hid ccm gpio_ich dell_rbtn dell_wmi dell_laptop sparse_keymap dell_smbios dcdbas dell_smm_hwmon arc4 snd_hda_codec_hdmi iwl3945 iwlegacy snd_hda_codec_idt mac80211 snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core coretemp snd_hwdep cfg80211 snd_pcm snd_seq_midi kvm snd_seq_midi_event snd_rawmidi snd_seq pcmcia snd_seq_device irqbypass yenta_socket snd_timer pcmcia_rsrc snd pcmcia_core joydev input_leds soundcore lpc_ich serio_raw shpchp mac_hid parport_pc ppdev lp parport autofs4 algif_skcipher af_alg dm_crypt i915 psmouse firewire_ohci pata_acpi i2c_algo_bit firewire_core drm_kms_helper crc_itu_t tg3 syscopyarea sysfillrect sysimgblt video fb_sys_fops wmi drm ptp pps_core
[22706.141138] CPU: 1 PID: 5083 Comm: kworker/1:1 Tainted: G        W       4.8.0-41-generic #44~16.04.1-Ubuntu
[22706.141139] Hardware name: Dell Inc. Latitude D630                   /0KU184, BIOS A09 04/03/2008
[22706.141152] Workqueue: events_freezable ieee80211_restart_work [mac80211]
[22706.141154]  0000000000000286 000000004e3454f5 ffff916afb0f7b78 ffffffff8622e043
[22706.141156]  0000000000000000 0000000000000000 ffff916afb0f7bb8 ffffffff85e8313b
[22706.141159]  00000027fb0f7b80 ffff916afb0b0700 ffff916afb0b0700 0000000000000000
[22706.141161] Call Trace:
[22706.141163]  [<ffffffff8622e043>] dump_stack+0x63/0x90
[22706.141165]  [<ffffffff85e8313b>] __warn+0xcb/0xf0
[22706.141167]  [<ffffffff85e8326d>] warn_slowpath_null+0x1d/0x20
[22706.141181]  [<ffffffffc081999a>] drv_stop+0xfa/0x100 [mac80211]
[22706.141199]  [<ffffffffc084db33>] ieee80211_stop_device+0x43/0x50 [mac80211]
[22706.141216]  [<ffffffffc082f5c2>] ieee80211_do_stop+0x4c2/0x800 [mac80211]
[22706.141218]  [<ffffffff8669b46e>] ? _raw_spin_unlock_bh+0x1e/0x20
[22706.141220]  [<ffffffff865abbab>] ? dev_deactivate_many+0x20b/0x250
[22706.141236]  [<ffffffffc082f91a>] ieee80211_stop+0x1a/0x20 [mac80211]
[22706.141239]  [<ffffffff86579af9>] __dev_close_many+0x99/0x100
[22706.141240]  [<ffffffff86579bf1>] dev_close_many+0x91/0x140
[22706.141242]  [<ffffffff8657bf3a>] dev_close.part.82+0x4a/0x70
[22706.141244]  [<ffffffff8657bf7a>] dev_close+0x1a/0x20
[22706.141257]  [<ffffffffc0788d35>] cfg80211_shutdown_all_interfaces+0x45/0xb0 [cfg80211]
[22706.141275]  [<ffffffffc084b4d8>] ieee80211_handle_reconfig_failure+0x98/0xb0 [mac80211]
[22706.141293]  [<ffffffffc084dbd6>] ieee80211_reconfig+0x96/0xfb0 [mac80211]
[22706.141307]  [<ffffffffc081620e>] ieee80211_restart_work+0x8e/0xc0 [mac80211]
[22706.141309]  [<ffffffff85e9d88b>] process_one_work+0x16b/0x4a0
[22706.141310]  [<ffffffff85e9dc0b>] worker_thread+0x4b/0x500
[22706.141312]  [<ffffffff85e9dbc0>] ? process_one_work+0x4a0/0x4a0
[22706.141313]  [<ffffffff85e9dbc0>] ? process_one_work+0x4a0/0x4a0
[22706.141315]  [<ffffffff85ea3fa8>] kthread+0xd8/0xf0
[22706.141317]  [<ffffffff8669ba1f>] ret_from_fork+0x1f/0x40
[22706.141318]  [<ffffffff85ea3ed0>] ? kthread_create_on_node+0x1e0/0x1e0
[22706.141319] ---[ end trace 7905e77c96f1b6a9 ]---
[22815.593040] IPv6: ADDRCONF(NETDEV_UP): wlp12s0: link is not ready
[22816.143874] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[22816.143880] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5
[22816.190603] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[22816.190606] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5
[22816.237326] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[22816.237328] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5
[22816.284047] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[22816.284050] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5
[22816.330764] iwl3945 0000:0c:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[22816.330766] iwl3945 0000:0c:00.0: Unable to set up bootstrap uCode: -5
[22816.369691] iwl3945 0000:0c:00.0: Unable to initialize device after 5 attempts.

Надо надеяться, часть этого полезна. Благодарный за любую справку.