Portege r400 keep losing wireless from standby

The built-in wireless on my Portege r400 keeps disappearing after resuming from standby in Ubuntu 16.04.

It comes back after reboot just fine, but it's kind of annoying.

dmesg gives me:


[ 3405.001081] iwl3945 0000:02:00.0: Microcode SW error detected. Restarting 0x82000008.
[ 3405.001094] iwl3945 0000:02:00.0: Loaded firmware version: 15.32.2.9
[ 3405.001130] iwl3945 0000:02:00.0: Start IWL Error Log Dump:
[ 3405.001136] iwl3945 0000:02:00.0: Status: 0x000302E4, count: 1
[ 3405.001140] iwl3945 0000:02:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line
[ 3405.001369] iwl3945 0000:02:00.0: SYSASSERT (0x5) 4194070648 0x008B6 0x017B8 0x00320 0x00000 65

[ 3405.001388] iwl3945 0000:02:00.0: Read idx for DMA queue txq id (4), idx 9, is out of range [0-256] 41 41.
[ 3405.001395] iwl3945 0000:02:00.0: Read idx for DMA queue txq id (4), idx 10, is out of range [0-256] 41 41.
[ 3405.001403] iwl3945 0000:02:00.0: Error Reply type 0x00000000 cmd UNKNOWN (0x00) seq 0x0000 ser 0x00000000
[ 3405.004120] iwl3945 0000:02:00.0: Can't stop Rx DMA.
[ 3405.006131] ieee80211 phy0: Hardware restart was requested
[ 5300.018813] wlp2s0: deauthenticating

and another time

[ 3184.320135] iwl3945 0000:02:00.0: Queue 2 stuck for 2500 ms.
[ 3184.320150] iwl3945 0000:02:00.0: On demand firmware reload
[ 3184.325905] ieee80211 phy0: Hardware restart was requested
[ 3184.374096] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 3184.374105] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 3184.420924] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 3184.420930] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 3184.467646] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 3184.467652] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 3184.514382] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 3184.514387] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 3184.561111] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 3184.561117] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 3184.601146] iwl3945 0000:02:00.0: Unable to initialize device after 5 attempts.
[ 3184.601160] ------------[ cut here ]------------
[ 3184.601250] WARNING: CPU: 0 PID: 5129 at /build/linux-xK5wks/linux-4.4.0/net/mac80211/util.c:1818 ieee80211_reconfig+0x1d5/0xef0 [mac80211]()
[ 3184.601254] Hardware became unavailable during restart.
[ 3184.601257] Modules linked in: cpuid rfcomm drbg ansi_cprng ctr ccm bnep wacom_w8001 serport btusb btrtl btbcm btintel bluetooth snd_hda_codec_realtek arc4 snd_hda_codec_generic snd_hda_intel coretemp iwl3945 snd_hda_codec iwlegacy snd_hda_core mac80211 snd_hwdep kvm snd_pcm gpio_ich snd_seq_midi snd_seq_midi_event cfg80211 irqbypass pcmcia snd_rawmidi snd_seq yenta_socket snd_seq_device pcmcia_rsrc snd_timer pcmcia_core snd lpc_ich soundcore joydev input_leds toshiba_acpi sparse_keymap serio_raw wmi shpchp toshiba_bluetooth toshiba_haps tpm_infineon mac_hid parport_pc ppdev lp parport autofs4 hid_generic usbhid hid i915 e1000e psmouse i2c_algo_bit drm_kms_helper syscopyarea sysfillrect ptp pata_acpi sysimgblt fb_sys_fops drm pps_core video fjes
[ 3184.601368] CPU: 0 PID: 5129 Comm: kworker/0:2 Tainted: G W 4.4.0-31-generic #50-Ubuntu
[ 3184.601372] Hardware name: TOSHIBA PORTEGE R400/Portable PC, BIOS Version 1.50 03/14/2007
[ 3184.601418] Workqueue: events_freezable ieee80211_restart_work [mac80211]
[ 3184.601423] c1acd967 f27fb110 00000286 d37f3e40 c13a689f d37f3e80 f8b9fb58 d37f3e70
[ 3184.601434] c1070317 f8b9fd08 d37f3ea0 00001409 f8b9fb58 0000071a f8b61c95 f8b61c95
[ 3184.601444] fffffffb f4cf0a44 f4cf0420 d37f3e8c c107038e 00000009 d37f3e80 f8b9fd08
[ 3184.601454] Call Trace:
[ 3184.601467] [] dump_stack+0x58/0x79
[ 3184.601476] [] warn_slowpath_common+0x87/0xc0
[ 3184.601529] [] ? ieee80211_reconfig+0x1d5/0xef0 [mac80211]
[ 3184.601581] [] ? ieee80211_reconfig+0x1d5/0xef0 [mac80211]
[ 3184.601587] [] warn_slowpath_fmt+0x3e/0x60
[ 3184.601639] [] ieee80211_reconfig+0x1d5/0xef0 [mac80211]
[ 3184.601647] [] ? mutex_lock+0x10/0x30
[ 3184.601693] [] ? ieee80211_scan_cancel+0x91/0x1c0 [mac80211]
[ 3184.601737] [] ieee80211_restart_work+0x5f/0xa0 [mac80211]
[ 3184.601745] [] process_one_work+0x121/0x3f0
[ 3184.601750] [] worker_thread+0x37/0x490
[ 3184.601756] [] ? process_one_work+0x3f0/0x3f0
[ 3184.601762] [] kthread+0xa6/0xc0
[ 3184.601768] [] ret_from_kernel_thread+0x21/0x38
[ 3184.601773] [] ? kthread_create_on_node+0x170/0x170
[ 3184.601778] ---[ end trace 4a55b647ba02b52e ]---
[ 3184.602108] wlp2s0: deauthenticating