Имеется карточка Intel 7260 AC. При попытке завести её в режиме точки доступа на 5 Ггц (либо 11n, либо 11ac, на 2.4 всё ок), получаем
hostapd: wlan0: IEEE 802.11 Configured channel (40) not found from the channel list of current mode (2) IEEE 802.11aСудя по всему, причина в этом (из iw list):
Frequencies:
* 5180 MHz [36] (17.0 dBm) (passive scanning, no IBSS)
* 5200 MHz [40] (17.0 dBm) (passive scanning, no IBSS)
* 5220 MHz [44] (17.0 dBm) (passive scanning, no IBSS)
* 5240 MHz [48] (17.0 dBm) (passive scanning, no IBSS)
* 5260 MHz [52] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5280 MHz [56] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5300 MHz [60] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5320 MHz [64] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5500 MHz [100] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5520 MHz [104] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5540 MHz [108] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5560 MHz [112] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5580 MHz [116] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5600 MHz [120] (disabled)
* 5620 MHz [124] (disabled)
* 5640 MHz [128] (disabled)
* 5660 MHz [132] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5680 MHz [136] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5700 MHz [140] (20.0 dBm) (passive scanning, no IBSS, radar detection)
DFS state: usable (for 151 sec)
* 5720 MHz [144] (disabled)
* 5745 MHz [149] (22.0 dBm) (passive scanning, no IBSS)
* 5765 MHz [153] (22.0 dBm) (passive scanning, no IBSS)
* 5785 MHz [157] (22.0 dBm) (passive scanning, no IBSS)
* 5805 MHz [161] (22.0 dBm) (passive scanning, no IBSS)
* 5825 MHz [165] (22.0 dBm) (passive scanning, no IBSS)
Притом что
iw reg get
country US: DFS-UNSET
(2402 - 2472 @ 40), (3, 27)
(5170 - 5250 @ 40), (3, 17)
(5250 - 5330 @ 40), (3, 20), DFS
(5490 - 5600 @ 40), (3, 20), DFS
(5650 - 5710 @ 40), (3, 20), DFS
(5735 - 5835 @ 40), (3, 30)
(57240 - 63720 @ 2160), (N/A, 40)
Если плясать с `iw reg set`, то список доступных частот меняется, некоторые становятся disabled, но ни одна из 5 Ггц не допускается в AP.
Похоже, что драйвер ориентируется на то, что задано в прошивке карточки, вот она:
iwlwifi 0000:05:00.0: loaded firmware version 25.228.9.0 op_mode iwlmvm
Отсюда вопрос - можно ли как-то обойти это ограничение, может перепрошить карточку на кастомную прошивку или пропатчить драйвер?
