hostapd configuration for 802.11ac in intel wifi card ubuntu 14.04 -

does 1 have idea configure hostapd in 802.11ac presently in hw_mode=g able 23 mbps speed want more 400 mbps throughput if change hw_mode=a hostapd not running below configuration file , error output

interface=wlp5s0 driver=nl80211  ssid=testingwifi  hw_mode=a channel=149 ht_capab=[ht40+] ieee80211n=1 ieee80211ac=1 vht_oper_chwidth=1 vht_oper_centr_freq_seg0_idx=42 

only channels 149,153,157 available me work on ,i using h270n-wifi server supports more 800 mbps

but getting following error

random: trying read entropy /dev/random configuration file: /etc/hostapd/hostapd.conf rfkill: initial event: idx=0 type=2 op=0 soft=0 hard=0 rfkill: initial event: idx=1 type=1 op=0 soft=0 hard=0 nl80211: tdls supported nl80211: tdls external setup nl80211: supported cipher 00-0f-ac:1 nl80211: supported cipher 00-0f-ac:5 nl80211: supported cipher 00-0f-ac:2 nl80211: supported cipher 00-0f-ac:4 nl80211: supported cipher 00-0f-ac:6 nl80211: using driver-based off-channel tx nl80211: tdls channel switch nl80211: use separate p2p group interface (driver advertised support) nl80211: enable multi-channel concurrent (driver advertised support) nl80211: use p2p_device support nl80211: interface wlp5s0 in phy phy0 nl80211: set mode ifindex 4 iftype 3 (ap) nl80211: failed set interface 4 mode 3: -16 (device or resource busy) nl80211: try mode change after setting interface down nl80211: set mode ifindex 4 iftype 3 (ap) nl80211: mode change succeeded while interface down nl80211: setup ap(wlp5s0) - device_ap_sme=0 use_monitor=0 nl80211: subscribe mgmt frames ap handle 0x55ff856fa1e0 nl80211: register frame type=0xb0 (wlan_fc_stype_auth) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0x0 (wlan_fc_stype_assoc_req) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0x20 (wlan_fc_stype_reassoc_req) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0xa0 (wlan_fc_stype_disassoc) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0xc0 (wlan_fc_stype_deauth) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0xd0 (wlan_fc_stype_action) nl_handle=0x55ff856fa1e0 match= nl80211: register frame type=0x40 (wlan_fc_stype_probe_req) nl_handle=0x55ff856fa1e0 match= nl80211: add own interface ifindex 4 nl80211: if_indices[16]: 4 phy: phy0 bss count 1, bssid mask 00:00:00:00:00:00 (0 bits) nl80211: regulatory information - country=00 nl80211: 2402-2472 @ 40 mhz 20 mbm nl80211: 2457-2482 @ 40 mhz 20 mbm (no ir) nl80211: 2474-2494 @ 20 mhz 20 mbm (no ofdm) (no ir) nl80211: 5170-5250 @ 80 mhz 20 mbm (no ir) nl80211: 5250-5330 @ 80 mhz 20 mbm (dfs) (no ir) nl80211: 5490-5730 @ 160 mhz 20 mbm (dfs) (no ir) nl80211: 5735-5835 @ 80 mhz 20 mbm (no ir) nl80211: 57240-63720 @ 2160 mhz 0 mbm nl80211: added 802.11b mode based on 802.11g information allowed channel: mode=1 chan=1 freq=2412 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=2 freq=2417 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=3 freq=2422 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=4 freq=2427 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=5 freq=2432 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=6 freq=2437 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=7 freq=2442 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=8 freq=2447 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=9 freq=2452 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=10 freq=2457 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=11 freq=2462 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=12 freq=2467 mhz max_tx_power=20 dbm allowed channel: mode=1 chan=13 freq=2472 mhz max_tx_power=20 dbm allowed channel: mode=2 chan=149 freq=5745 mhz max_tx_power=20 dbm allowed channel: mode=2 chan=153 freq=5765 mhz max_tx_power=20 dbm allowed channel: mode=2 chan=157 freq=5785 mhz max_tx_power=20 dbm allowed channel: mode=2 chan=161 freq=5805 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=1 freq=2412 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=2 freq=2417 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=3 freq=2422 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=4 freq=2427 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=5 freq=2432 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=6 freq=2437 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=7 freq=2442 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=8 freq=2447 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=9 freq=2452 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=10 freq=2457 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=11 freq=2462 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=12 freq=2467 mhz max_tx_power=20 dbm allowed channel: mode=0 chan=13 freq=2472 mhz max_tx_power=20 dbm hw vht capab: 0x39071b0, conf vht capab: 0x0 wlp5s0: interface state uninitialized->ht_scan scan neighboring bsses prior enabling 40 mhz channel 40 mhz affected channel range: [5735,5775] mhz wlp5s0: nl80211: scan request nl80211: scan frequency 5745 mhz nl80211: scan frequency 5765 mhz scan requested (ret=0) - scan timeout 10 seconds interface initialization completed in callback ctrl_iface not configured! random: got 20/20 bytes /dev/random rtm_newlink: ifi_index=4 ifname=wlp5s0 operstate=2 linkmode=0 ifi_family=0 ifi_flags=0x1002 () nl80211: ignore interface down event since interface wlp5s0 rtm_newlink: ifi_index=4 ifname=wlp5s0 operstate=2 linkmode=0 ifi_family=0 ifi_flags=0x1003 ([up]) nl80211: event message available nl80211: drv event 33 (nl80211_cmd_trigger_scan) received wlp5s0 wlp5s0: nl80211: scan trigger wlp5s0: event scan_started (47) received unknown event 47 rtm_newlink: ifi_index=4 ifname=wlp5s0 wext ifi_family=0 ifi_flags=0x1003 ([up]) nl80211: event message available nl80211: drv event 34 (nl80211_cmd_new_scan_results) received wlp5s0 wlp5s0: nl80211: new scan results available nl80211: scan included frequencies: 5745 5765 wlp5s0: event scan_results (3) received nl80211: received scan results (0 bsses) ht40: control channel: 149  secondary channel: 153 completing interface initialization mode: ieee 802.11a  channel: 149  frequency: 5745 mhz dfs 0 channels required radar detection not set channel kernel driver interface initialization failed wlp5s0: interface state ht_scan->disabled wlp5s0: ap-disabled hostapd_interface_deinit_free(0x55ff856fb720) hostapd_interface_deinit_free: num_bss=1 conf->num_bss=1 hostapd_interface_deinit(0x55ff856fb720) wlp5s0: interface state disabled->disabled hostapd_bss_deinit: deinit bss wlp5s0 wlp5s0: deauthenticate stations nl80211: send_mlme - da= ff:ff:ff:ff:ff:ff noack=0 freq=0 no_cck=0 offchanok=0 wait_time=0 fc=0xc0 (wlan_fc_stype_deauth) nlmode=3 nl80211: send_mlme -> send_frame nl80211: send_frame - use bss->freq=0 nl80211: send_frame -> send_frame_cmd nl80211: cmd_frame freq=0 wait=0 no_cck=0 no_ack=0 offchanok=0 cmd_frame - hexdump(len=26): c0 00 00 00 ff ff ff ff ff ff 00 28 f8 d1 78 60 00 28 f8 d1 78 60 00 00 03 00 nl80211: frame command failed: ret=-22 (invalid argument) (freq=0 wait=0) wlp5s0: ap-disabled hostapd_cleanup(hapd=0x55ff856fc680 (wlp5s0)) hostapd_free_hapd_data: interface wlp5s0 wasn't started hostapd_interface_deinit_free: driver=0x55ff846aed00 drv_priv=0x55ff856fd480 -> hapd_deinit nl80211: deinit ifname=wlp5s0 disabled_11b_rates=0 nl80211: remove monitor interface: refcount=0 nl80211: remove beacon (ifindex=4) netlink: operstate: ifindex=4 linkmode=0 (kernel-control), operstate=6 (if_oper_up) nl80211: set mode ifindex 4 iftype 2 (station) nl80211: failed set interface 4 mode 2: -16 (device or resource busy) nl80211: try mode change after setting interface down nl80211: set mode ifindex 4 iftype 2 (station) nl80211: mode change succeeded while interface down nl80211: teardown ap(wlp5s0) - device_ap_sme=0 use_monitor=0 nl80211: unsubscribe mgmt frames handle 0x8888dd770de72969 (ap teardown) hostapd_interface_free(0x55ff856fb720) hostapd_interface_free: free hapd 0x55ff856fc680 hostapd_cleanup_iface(0x55ff856fb720) hostapd_cleanup_iface_partial(0x55ff856fb720) hostapd_cleanup_iface: free iface=0x55ff856fb720 

how can solve ?