5GHz disconnections

[captsmile]

Built this driver for TP-Link Archer T3U AC1300 on Synology NAS DS220j (kernel 4.4.59+). Mostly works fine but rarely lost connection

dmesg:

[Oct20 23:25] RTW: recvbuf2recvframe()-128: RX Warning!,pkt_len<=0(0) or pkt_offset(24)> transfer_len(438)
[ +11.928171] RTW: recvbuf2recvframe()-128: RX Warning!,pkt_len<=0(10784) or pkt_offset(10930)> transfer_len(1004)
[  +0.010432] RTW: recvbuf2recvframe()-131: RX Warning!,RXDESC_SIZE(24), drvinfo_sz(120), shift_sz(2),pkt_len(10784)
[  +4.189815] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.499993] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.499999] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.007140] RTW: issue_probereq_ex(wlan0) to b8:**:**:**:**:**, ch:36, 3/3 in 1500 ms
[  +0.502850] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.499995] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.499995] RTW: rtw_sctx_wait timeout: dump_mgntframe_and_wait_ack_timeout
[  +0.007142] RTW: issue_nulldata(wlan0) to b8:**:**:**:**:**, ch:36, 3/3 in 1500 ms
[  +0.007769] RTW: linked_status_chk(wlan0) disconnect or roaming
[  +0.006071] RTW: receive_disconnect
[  +0.003579] RTW: report_del_sta_event(wlan0) b8:**:**:**:**:** mac_id=0, enqueue:1, res:1
[  +0.012321] RTW: wlan0 cmd=57,2,0 process_time=3040
[  +0.005182] RTW: rtw_set_ps_mode(wlan0) Enter 802.11 power save - WIFI-TRAFFIC_IDLE
[  +0.007840] RTW: rtl8822b_set_FwPwrMode_cmd(wlan0): HW port id=0
[  +0.006170] RTW: rtl8822b_set_FwPwrMode_cmd(wlan0): fw ps mode = LPS, drv ps mode = 2, rlbm = 1 , smart_ps = 2, allQueueUAPSD = 0

iw wlan0 set power_save off runs on sturtup and cannot help

[captsmile]

iw wlan0 set power_save off does not run on startup. But sometimes active downloading drops connection whatever. Watchdog helps