WiFi Problems with GL-X750 V2 EP06-E

sb11 · 2022-01-17T13:19:36.477Z

Hi there,

since a few months I’m using a GL-X750 V2 EP06-E to access the internet and to create a WiFi network at home. The internet access is established via the internal LTE modem. The majority of the clients in connected via 2.4G WiFi, one client is connected via LAN cable.

Overall I am really happy with the device. However from time to time there is a problem with the WiFi connectivity. In this case all the WiFi clients cannot access the internet anymore, even though they are still connected to the WiFi network. If I run an internet speedtest from one of the WiFi clients (for example via Ookla), I get a normal downstream (in my case around 50 Mbps). However the upstream dropped significantly below average (below 1 Mbps instead of 30 Mbps during normal operation).

Rebooting the router fixes the problem. By coincidence I also found a quicker fix. If this problem happens, I can still access the admin page of the router from the client, which is connected via LAN cable. When I change any of the parameters of the WiFi settings (I usually change the channel), the upstream of the WiFi clients is back to normal and the internet access is working again.

Does anybody know, what the reason for this problem might be? If I forgot any important information, please let me know.

Thanks a lot in advance!

Best regards…

wcs2228 · 2022-01-19T03:56:01.057Z

When the problem occurs, are you still able to access the admin page over Wifi, instead of over LAN cable?

Does the problem occur on 5 GHz Wifi, or only 2.4 GHz?

If possible, post the portions of the System Log and Kernel Log before/after when the oroblem iccurs.

limbot · 2022-01-19T05:07:56.320Z

Firmware version currently? Worth updating to latest ?

sb11 · 2022-01-19T07:28:05.636Z

Thanks for your replies. Here is my input:

When the problem occurs, it’s usually not possible to access the admin page over Wifi. One time I managed it, but it was terribly slow.

I don’t use 5 GHz Wifi, so in my case it only occurs on 2.4 GHz.

Where can I find the System Log and Kernel Log?

My current firmware version is 3.201. I just noticed that there is version 3.203 available. Are there any fixes in the new firmware version, that could be related to my problem?

Thanks and best regards…

sb11 · 2022-01-19T12:31:55.278Z

I just had the issue again. I was not able to access the admin page via Wifi. Only LAN was working.

I managed to find System Log and Kernel Log. Here are the “newest” entries.

System Log:

Wed Jan 19 12:07:02 2022 daemon.info dnsmasq-dhcp[3077]: DHCPREQUEST(br-lan) 192.168.8.195 38:30:f9:00:c7:bb

Wed Jan 19 12:07:02 2022 daemon.info dnsmasq-dhcp[3077]: DHCPACK(br-lan) 192.168.8.195 38:30:f9:00:c7:bb LG-Q7

Wed Jan 19 12:07:06 2022 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED 00:80:e1:c9:cc:62

Wed Jan 19 12:07:06 2022 daemon.info hostapd: wlan1: STA 00:80:e1:c9:cc:62 IEEE 802.11: authenticated

Wed Jan 19 12:07:06 2022 daemon.info hostapd: wlan1: STA 00:80:e1:c9:cc:62 IEEE 802.11: associated (aid 2)

Wed Jan 19 12:07:06 2022 daemon.notice hostapd: wlan1: AP-STA-CONNECTED 00:80:e1:c9:cc:62

Wed Jan 19 12:07:06 2022 daemon.info hostapd: wlan1: STA 00:80:e1:c9:cc:62 RADIUS: starting accounting session 1AD885C631FA64A6

Wed Jan 19 12:07:06 2022 daemon.info hostapd: wlan1: STA 00:80:e1:c9:cc:62 WPA: pairwise key handshake completed (RSN)

Wed Jan 19 12:07:07 2022 daemon.info dnsmasq-dhcp[3077]: DHCPDISCOVER(br-lan) 00:80:e1:c9:cc:62

Wed Jan 19 12:07:07 2022 daemon.info dnsmasq-dhcp[3077]: DHCPOFFER(br-lan) 192.168.8.216 00:80:e1:c9:cc:62

Wed Jan 19 12:07:09 2022 daemon.info dnsmasq-dhcp[3077]: DHCPREQUEST(br-lan) 192.168.8.216 00:80:e1:c9:cc:62

Wed Jan 19 12:07:09 2022 daemon.info dnsmasq-dhcp[3077]: DHCPACK(br-lan) 192.168.8.216 00:80:e1:c9:cc:62 softliQ-SD21-c9cc62

Wed Jan 19 12:19:54 2022 daemon.notice netifd: modem_1_1_2_4 (9094): udhcpc: sending renew to 100.96.108.9

Wed Jan 19 12:19:54 2022 daemon.notice netifd: modem_1_1_2_4 (9094): udhcpc: lease of 100.96.108.10 obtained, lease time 7200

====================

Kernel Log:

[1981636.860366] WARNING: CPU: 0 PID: 1028 at backports-4.19.161-1/net/mac80211/ieee80211_i.h:1429 sta_info_alloc+0x378/0x4a8 [mac80211]

[1981636.872848] Modules linked in: ath9k ath9k_common rt2800usb rt2800lib pppoe ppp_async ath9k_hw ath10k_pci ath10k_core ath rt2x00usb rt2x00lib pppox ppp_mppe ppp_generic option nf_nat_pptp nf_conntrack_pptp mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE ebtable_nat ebtable_filter ebtable_broute cfg80211 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_hashlimit xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_IPMARK xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY wireguard usb_wwan ts_fsm ts_bm slhc sierra_net sierra rndis_host qmi_wwan nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc

[1981636.946493] nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_ftp nf_nat_amanda nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast ts_kmp nf_conntrack_amanda iptable_raw iptable_mangle iptable_filter ipt_ECN ipheth ip_tables huawei_cdc_ncm ebtables ebt_vlan ebt_stp ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_among ebt_802_3 crc_ccitt cp210x compat_xtables compat cdc_wdm cdc_ncm cdc_ether cdc_acm xt_u32 fuse sch_teql sch_sfq sch_red sch_prio sch_pie sch_multiq sch_gred sch_fq sch_dsmark sch_codel sch_cbq em_text em_nbyte em_meta em_cmp act_simple act_police act_pedit act_ipt act_gact act_csum

[1981637.020420] libcrc32c act_connmark sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_tcindex cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred xt_set ip_set_list_set ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_netnet ip_set_hash_netiface ip_set_hash_net ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6t_NPT ip6t_MASQUERADE nf_nat_masquerade_ipv6 nf_nat nf_conntrack nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 GobiSerial usbserial GobiNet usbnet ip6_udp_tunnel udp_tunnel tun vfat fat ntfs nls_utf8 nls_iso8859_1

[1981637.094227] nls_cp437 sha1_generic ecb uas usb_storage uhci_hcd ohci_platform ohci_hcd ehci_platform sd_mod scsi_mod ehci_hcd gpio_button_hotplug ext4 mbcache jbd2 exfat phy_ar7200_usb phy_ar7100_usb usbcore nls_base usb_common mii aead crypto_null cryptomgr crc32c_generic crypto_hash

[1981637.120721] CPU: 0 PID: 1028 Comm: hostapd Not tainted 4.14.221 #0

[1981637.127285] Stack : 805d0000 80588b18 00000000 00000000 80555c0c 86089aac 8629d41c 805b5a27

[1981637.136171] 80551cf0 00000404 80713670 00000595 014000c0 00000001 86089a60 66ea832c

[1981637.145018] 00000000 00000000 80710000 00007790 00000000 00000000 00000007 00000000

[1981637.153854] 0000017b 0f1cd09d 0000017a 00000000 80000000 00000009 00000000 86be6868

[1981637.162689] 86b86490 00000595 014000c0 00000010 00000003 802cbcb4 00000000 80710000

[1981637.171519] …

[1981637.174223] Call Trace:

[1981637.176956] [<8006aaac>] show_stack+0x58/0x100

[1981637.181874] [<800853b0>] __warn+0xe4/0x13c

[1981637.186365] [<80085498>] warn_slowpath_null+0x1c/0x34

[1981637.191957] [<86b86490>] sta_info_alloc+0x378/0x4a8 [mac80211]

[1981637.198431] [<86ba0bf4>] ieee80211_nan_func_match+0x3590/0x4170 [mac80211]

[1981637.205936] [<86b1e924>] cfg80211_rx_control_port+0x4294/0x6f34 [cfg80211]

[1981637.213297] —[ end trace 84b67a1dece37456 ]—

[1981638.613177] br-lan: port 3(wlan1) entered blocking state

[1981638.618940] br-lan: port 3(wlan1) entered forwarding state

[2015402.191876] device wlan1 left promiscuous mode

[2015402.196971] br-lan: port 3(wlan1) entered disabled state

[2015403.228832] br-lan: port 3(wlan1) entered blocking state

[2015403.234590] br-lan: port 3(wlan1) entered disabled state

[2015403.240603] device wlan1 entered promiscuous mode

[2015404.750424] br-lan: port 3(wlan1) entered blocking state

[2015404.756167] br-lan: port 3(wlan1) entered forwarding state

[2015409.654093] device wlan1 left promiscuous mode

[2015409.659074] br-lan: port 3(wlan1) entered disabled state

[2015410.701792] br-lan: port 3(wlan1) entered blocking state

[2015410.707572] br-lan: port 3(wlan1) entered disabled state

[2015410.713704] device wlan1 entered promiscuous mode

[2015412.211483] br-lan: port 3(wlan1) entered blocking state

[2015412.217237] br-lan: port 3(wlan1) entered forwarding state

[2059685.682203] device wlan1 left promiscuous mode

[2059685.687248] br-lan: port 3(wlan1) entered disabled state

[2059686.721063] br-lan: port 3(wlan1) entered blocking state

[2059686.726779] br-lan: port 3(wlan1) entered disabled state

[2059686.732835] device wlan1 entered promiscuous mode

[2059688.268421] br-lan: port 3(wlan1) entered blocking state

[2059688.274177] br-lan: port 3(wlan1) entered forwarding state

[2059692.846154] device wlan1 left promiscuous mode

[2059692.851207] br-lan: port 3(wlan1) entered disabled state

[2059694.255343] br-lan: port 3(wlan1) entered blocking state

[2059694.261108] br-lan: port 3(wlan1) entered disabled state

[2059694.267108] device wlan1 entered promiscuous mode

[2059695.772634] br-lan: port 3(wlan1) entered blocking state

[2059695.778316] br-lan: port 3(wlan1) entered forwarding state

[2364959.116140] device wlan1 left promiscuous mode

[2364959.121155] br-lan: port 3(wlan1) entered disabled state

[2364960.861945] br-lan: port 3(wlan1) entered blocking state

[2364960.867666] br-lan: port 3(wlan1) entered disabled state

[2364960.873721] device wlan1 entered promiscuous mode

[2364962.540630] br-lan: port 3(wlan1) entered blocking state

[2364962.546316] br-lan: port 3(wlan1) entered forwarding state

[2364966.796949] device wlan1 left promiscuous mode

[2364966.801919] br-lan: port 3(wlan1) entered disabled state

[2364967.826830] br-lan: port 3(wlan1) entered blocking state

[2364967.832579] br-lan: port 3(wlan1) entered disabled state

[2364967.838608] device wlan1 entered promiscuous mode

[2364969.347316] br-lan: port 3(wlan1) entered blocking state

[2364969.353076] br-lan: port 3(wlan1) entered forwarding state

[2423090.660508] device wlan1 left promiscuous mode

[2423090.665460] br-lan: port 3(wlan1) entered disabled state

[2423091.719352] br-lan: port 3(wlan1) entered blocking state

[2423091.725036] br-lan: port 3(wlan1) entered disabled state

[2423091.731111] device wlan1 entered promiscuous mode

[2423093.356130] br-lan: port 3(wlan1) entered blocking state

[2423093.361816] br-lan: port 3(wlan1) entered forwarding state

[2423097.542596] device wlan1 left promiscuous mode

[2423097.547997] br-lan: port 3(wlan1) entered disabled state

[2423098.939366] br-lan: port 3(wlan1) entered blocking state

[2423098.945090] br-lan: port 3(wlan1) entered disabled state

[2423098.951213] device wlan1 entered promiscuous mode

[2423100.517514] br-lan: port 3(wlan1) entered blocking state

[2423100.523270] br-lan: port 3(wlan1) entered forwarding state

[2533405.848395] device wlan1 left promiscuous mode

[2533405.853500] br-lan: port 3(wlan1) entered disabled state

[2533407.121868] br-lan: port 3(wlan1) entered blocking state

[2533407.127704] br-lan: port 3(wlan1) entered disabled state

[2533407.133847] device wlan1 entered promiscuous mode

[2533408.771518] br-lan: port 3(wlan1) entered blocking state

[2533408.777231] br-lan: port 3(wlan1) entered forwarding state

[2533412.364849] device wlan1 left promiscuous mode

[2533412.369838] br-lan: port 3(wlan1) entered disabled state

[2533413.723644] br-lan: port 3(wlan1) entered blocking state

[2533413.729426] br-lan: port 3(wlan1) entered disabled state

[2533413.735605] device wlan1 entered promiscuous mode

[2533415.367102] br-lan: port 3(wlan1) entered blocking state

[2533415.372836] br-lan: port 3(wlan1) entered forwarding state

[2772903.932841] device wlan1 left promiscuous mode

[2772903.937859] br-lan: port 3(wlan1) entered disabled state

[2772904.972273] br-lan: port 3(wlan1) entered blocking state

[2772904.978137] br-lan: port 3(wlan1) entered disabled state

[2772904.984151] device wlan1 entered promiscuous mode

[2772906.501569] br-lan: port 3(wlan1) entered blocking state

[2772906.507309] br-lan: port 3(wlan1) entered forwarding state

[2772911.449747] device wlan1 left promiscuous mode

[2772911.454676] br-lan: port 3(wlan1) entered disabled state

[2772912.520870] br-lan: port 3(wlan1) entered blocking state

[2772912.526695] br-lan: port 3(wlan1) entered disabled state

[2772912.532695] device wlan1 entered promiscuous mode

[2772914.126873] br-lan: port 3(wlan1) entered blocking state

[2772914.132553] br-lan: port 3(wlan1) entered forwarding state

[2793435.898908] device wlan1 left promiscuous mode

[2793435.903990] br-lan: port 3(wlan1) entered disabled state

[2793436.927526] br-lan: port 3(wlan1) entered blocking state

[2793436.933306] br-lan: port 3(wlan1) entered disabled state

[2793436.939435] device wlan1 entered promiscuous mode

[2793436.944596] br-lan: port 3(wlan1) entered blocking state

[2793436.950323] br-lan: port 3(wlan1) entered forwarding state

[2793436.956382] br-lan: port 3(wlan1) entered disabled state

[2793438.474449] br-lan: port 3(wlan1) entered blocking state

[2793438.480193] br-lan: port 3(wlan1) entered forwarding state

[2793443.237149] device wlan1 left promiscuous mode

[2793443.242166] br-lan: port 3(wlan1) entered disabled state

[2793444.480885] br-lan: port 3(wlan1) entered blocking state

[2793444.486654] br-lan: port 3(wlan1) entered disabled state

[2793444.492703] device wlan1 entered promiscuous mode

[2793446.016486] br-lan: port 3(wlan1) entered blocking state

[2793446.022254] br-lan: port 3(wlan1) entered forwarding state

[2868257.342672] device wlan1 left promiscuous mode

[2868257.347596] br-lan: port 3(wlan1) entered disabled state

[2868258.381082] br-lan: port 3(wlan1) entered blocking state

[2868258.386831] br-lan: port 3(wlan1) entered disabled state

[2868258.392877] device wlan1 entered promiscuous mode

[2868260.011569] br-lan: port 3(wlan1) entered blocking state

[2868260.017273] br-lan: port 3(wlan1) entered forwarding state

[2868264.427125] device wlan1 left promiscuous mode

[2868264.432098] br-lan: port 3(wlan1) entered disabled state

[2868265.461158] br-lan: port 3(wlan1) entered blocking state

[2868265.466958] br-lan: port 3(wlan1) entered disabled state

[2868265.472998] device wlan1 entered promiscuous mode

[2868266.983750] br-lan: port 3(wlan1) entered blocking state

[2868266.989435] br-lan: port 3(wlan1) entered forwarding state

[2894425.785043] device wlan1 left promiscuous mode

[2894425.790130] br-lan: port 3(wlan1) entered disabled state

[2894426.891189] br-lan: port 3(wlan1) entered blocking state

[2894426.897059] br-lan: port 3(wlan1) entered disabled state

[2894426.903063] device wlan1 entered promiscuous mode

[2894428.402971] br-lan: port 3(wlan1) entered blocking state

[2894428.408727] br-lan: port 3(wlan1) entered forwarding state

[2894433.412518] device wlan1 left promiscuous mode

[2894433.417519] br-lan: port 3(wlan1) entered disabled state

[2894434.443143] br-lan: port 3(wlan1) entered blocking state

[2894434.448964] br-lan: port 3(wlan1) entered disabled state

[2894434.454962] device wlan1 entered promiscuous mode

[2894435.965913] br-lan: port 3(wlan1) entered blocking state

[2894435.971599] br-lan: port 3(wlan1) entered forwarding state

[3040397.622280] device wlan1 left promiscuous mode

[3040397.627218] br-lan: port 3(wlan1) entered disabled state

[3040398.952677] br-lan: port 3(wlan1) entered blocking state

[3040398.958363] br-lan: port 3(wlan1) entered disabled state

[3040398.964445] device wlan1 entered promiscuous mode

[3040400.686763] br-lan: port 3(wlan1) entered blocking state

[3040400.692523] br-lan: port 3(wlan1) entered forwarding state

[3040405.395302] device wlan1 left promiscuous mode

[3040405.400386] br-lan: port 3(wlan1) entered disabled state

[3040406.424521] br-lan: port 3(wlan1) entered blocking state

[3040406.430332] br-lan: port 3(wlan1) entered disabled state

[3040406.436418] device wlan1 entered promiscuous mode

[3040407.937651] br-lan: port 3(wlan1) entered blocking state

[3040407.943413] br-lan: port 3(wlan1) entered forwarding state

[3054184.734034] device wlan1 left promiscuous mode

[3054184.739167] br-lan: port 3(wlan1) entered disabled state

[3054185.807407] br-lan: port 3(wlan1) entered blocking state

[3054185.813129] br-lan: port 3(wlan1) entered disabled state

[3054185.819185] device wlan1 entered promiscuous mode

[3054187.371642] br-lan: port 3(wlan1) entered blocking state

[3054187.377388] br-lan: port 3(wlan1) entered forwarding state

[3054192.250715] device wlan1 left promiscuous mode

[3054192.255816] br-lan: port 3(wlan1) entered disabled state

[3054193.591802] br-lan: port 3(wlan1) entered blocking state

[3054193.597564] br-lan: port 3(wlan1) entered disabled state

[3054193.603633] device wlan1 entered promiscuous mode

[3054195.246544] br-lan: port 3(wlan1) entered blocking state

[3054195.252228] br-lan: port 3(wlan1) entered forwarding state

wcs2228 · 2022-01-19T21:13:11.705Z

I also sometimes have messages in the Kernel regarding “wlan” entering blocking/disabled/promiscuous mode, so they may or may not be “normal”.

It is likely worth updating the firmware to 3.203, since it was released back in August 2021.

It would be good to test if the problem occurs on 5 GHz band because you indicated that you can fix it by changing the 2.4 GHz channel. The 2.4 GHz band tends to be quite congested and, if 5 GHz does not have the problem, then congestion may a cause. On 2.4 GHz, you should stick to HT20 bandwidth because there is more interference with wider bandwidth.

There are various apps that display all the nearby wifi devices and their channels broadcasting on 2.4 GHz / 5 GHz. I use the Wifi Analyzer app on my Android smartphone to do a site survey and pick the channel on each band to avoid the most congestion.

alzhao · 2022-01-22T04:50:08.046Z

Did you use Wireguard?

As @limbot said, can you upgrade to 3.211?

sb11 · 2022-01-22T09:33:17.898Z

I already used Wifi Analyzer to pick the best available channel. My channel is not congested and changing the channel is just one possible remedy to fix my problem without rebooting the router. I could change any setting on the Wifi settings page - changing the channel was just one example.

No, I’m not using Wireguard.

Version 3.211?? The last available version is 3.203. I upgraded to this version and will further examine, if the problem appears again.

sb11 · 2022-01-24T08:01:42.997Z

The firmware update did not fix the problem. Yesterday the problem occurred twice again.

Any other ideas, how to fix this?

alzhao · 2022-01-24T08:44:51.571Z

sb11:

Version 3.211?? The last available version is 3.203. I upgraded to this version and will further examine, if the problem appears again.

3.211 beta6 from here GL.iNet download center

sb11 · 2022-01-26T11:56:42.816Z

No, I will not install a beta version.

alzhao · 2022-01-27T11:35:13.520Z

Beta may not be good. But it is released today as stable version.

sb11 · 2022-02-01T08:36:15.727Z

I upgraded to 3.211 but the problem still occurs. This is getting really annoying.

alzhao · 2022-02-04T02:38:07.623Z

Are you sure it is wifi problem, not LTE?

If you test 5G wifi and Ethernet cable and it works OK, then it should not be a wifi problem.

For LTE, pls try the config in this post North American Carriers, ATT, Verizon, Cricket, T-Mobile Setup and Update 2021

Especially use ttyUSB3 as device to connect which is more compatible.

sb11 · 2022-02-04T08:25:37.586Z

No, it’s not an LTE problem. If the problem occurs and I run a speed test from the client, which is connected via ethernet, the speed is normal. If I run the speed test from the wifi client, I get a normal downstream, but the upstream is significantly below average. So how is this not a wifi problem?

alzhao · 2022-02-04T08:57:33.032Z

sb11:

If the problem occurs and I run a speed test from the client, which is connected via ethernet, the speed is normal. If I run the speed test from the wifi client, I get a normal downstream, but the upstream is significantly below average.

So when you do speedtest using cable or 5G wifi, speed is normal, right? I didn’t get such info. Maybe I missed something.

For 2.4G, most of the things to try is to change channel. Can you do that? Change between 1, 6, and 11 to find the best channel to use.

sb11 · 2022-02-04T13:27:11.296Z

As written before, I already used Wifi Analyzer to pick the best available channel.

alzhao · 2022-02-06T03:17:30.158Z

sb11:

Wifi Analyzer

I don’t know how does wifi analyzer work. Maybe it is just digital, not analog.

2.4G wifif has interference with some band of the LTE. So change channel to 1 or 11 to see if there is any luck. But as you said 1Mbps seems this is not the issue.

sb11 · 2022-02-14T12:44:14.392Z

No, I don’t think the issue is related to an interference with LTE. Before I bought the GL-X750, I used the same Wifi channel on my old router and never had such issues.

Walliot · 2024-09-01T14:04:19.139Z

Hello, I've been having this exact same issue as well for quite some time with my GL-X750V2 regardless of what channel I use. Only the 2.4gh wifi is affected and becomes unusable while the 5ghz and LAN connections keep working just fine. I can replicate this whenever I try to send large files to my Synology NAS (connected to the LAN port) from a 2.4ghz wifi client. How can we resolve this? This shouldn't be happening, especially since I'm running the latest firmware for the GL-X750V2. This bug should've been fixed a long time ago.