Setting radio frequency IT in wifi card

[x@m72]

Hi,
are in possession of the x201 notebook with the wireless card "Intel (R) Centrino (R) Advanced-N 6200 AGN, REV = 0x74" after upgrading to xubuntu 16.10 I observed a slowdown in wireless connection. After several attempts and drivers checked:

$ dmesg | grep firmware
[ 3.040469] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3
[ 3.913823] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-6000-6.ucode failed with error -2
[ 3.913880] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-6000-5.ucode failed with error -2
[ 3.936700] iwlwifi 0000:02:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm

$ dmesg | grep iwlwifi
[ 3.894874] iwlwifi 0000:02:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 3.913823] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-6000-6.ucode failed with error -2
[ 3.913880] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-6000-5.ucode failed with error -2
[ 3.936700] iwlwifi 0000:02:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
[ 4.028640] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 4.028643] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 4.028645] iwlwifi 0000:02:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 4.028647] iwlwifi 0000:02:00.0: Detected Intel(R) Centrino(R) Advanced-N 6200 AGN, REV=0x74
[ 4.030910] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 4.416616] iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
[ 5.620886] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 5.621150] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 5.621242] iwlwifi 0000:02:00.0: Radio type=0x1-0x3-0x1
[ 5.845019] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 5.845253] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled
[ 5.845344] iwlwifi 0000:02:00.0: Radio type=0x1-0x3-0x1

and verified the /etc/modprobe.d/iwlwifi.conf configuration file:
options iwlwifi swcrypto=1 11n_disable=8 bt_coex_active=0 led_mode=1

without getting any improvement, reading on the internet I saw that the problem could be the frequencies of the wireless card, in fact across power of the NB I note:
$ sudo iw reg get
country DE: DFS-ETSI
   (2400 - 2483 @ 40), (N/A, 20), (N/A)
   (5150 - 5250 @ 80), (N/A, 20), (N/A), NO-OUTDOOR
   (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS
   (5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
   (57000 - 66000 @ 2160), (N/A, 40), (N/A)

then run:
$ sudo iw reg set IT

$ sudo iw reg get
country 98: DFS-ETSI
   (2402 - 2482 @ 40), (N/A, 20), (N/A)
   (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-OUTDOOR
   (5250 - 5330 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS
   (5490 - 5710 @ 160), (N/A, 26), (0 ms), DFS
   (57000 - 66000 @ 2160), (N/A, 40), (N/A)

after the command of "iw reg set IT" connect regains velocity having before upgrading to 16.10.
At this point I changed the line "REGDOMAIN = IT" in /etc/default/cdra, but on reboot everything went back to the German frequencies DE. To solve I added temporarily in /etc/rc.local "iw reg set IT".

Please could you fix it? Thank you