AC87U gets stuck in AP mode

[fiasko]

I tried to update my AC87U to 384.12 firmware and the router just doesn't survive from the update and settings process. I'm using the router in AP mode and there are 2 computers connected in LAN ports 1 and 2, and I have only 5G WLAN radio enabled.
After initial boot -> update -> power cycle -> manual system check -routine that I do after every firmware update the router just got stuck. I tried factory reset it lets me to make the initial setups. After I turn AP mode on and configure the WIFI, the router slows down after every setting and in the end it just doesn't work. The computers that I have connected don't get any data throug the router and the router doesn't respond to anything Only LAN1 LED blinks, but others are silent. With 384.11_2 firmware I can do all the configurations I need and it works, but even there I can notice a slowdown during the configurations. By slowdown I mean the router recovers slower and slower after every time I apply some settings. With 384.12 firmware usually after some of the latest configuration I do the router doesn't recover anymore. It doesn't mater in which order I apply the settings. AP mode -> Wifi 2.4G off -> wifi 5G settings + channel -> System settings it always gets stuck at some point or the other.

There are some errors in the log (see below) and it seems similar with both 384.12 and 384.11_2 firmwares. I have no idea if it has anything to do with the issue.


Jun 26 20:06:17 kernel: ------------[ cut here ]------------
Jun 26 20:06:17 kernel: WARNING: at include/linux/skbuff.h:1478 fa_process_tx+0x188/0x194 [et]()
Jun 26 20:06:17 kernel: module: usblp bf711000 10321
Jun 26 20:06:17 kernel: module: thfsplus bf6f4000 85326
Jun 26 20:06:17 kernel: module: tntfs bf66c000 498773
Jun 26 20:06:17 kernel: module: tfat bf633000 189154
Jun 26 20:06:17 kernel: module: ext2 bf61f000 52776
Jun 26 20:06:17 kernel: module: ext4 bf5de000 221674
Jun 26 20:06:17 kernel: module: crc16 bf5d8000 1007
Jun 26 20:06:17 kernel: module: jbd2 bf5c5000 48993
Jun 26 20:06:17 kernel: module: ext3 bf5a3000 106409
Jun 26 20:06:17 kernel: module: jbd bf592000 42367
Jun 26 20:06:17 kernel: module: mbcache bf58b000 4599
Jun 26 20:06:17 kernel: module: usb_storage bf57c000 34290
Jun 26 20:06:17 kernel: module: sg bf571000 19855
Jun 26 20:06:17 kernel: module: sd_mod bf565000 21983
Jun 26 20:06:17 kernel: module: scsi_wait_scan bf55f000 416
Jun 26 20:06:17 kernel: module: scsi_mod bf53a000 108738
Jun 26 20:06:17 kernel: module: cdc_mbim bf534000 3137
Jun 26 20:06:17 kernel: module: qmi_wwan bf52d000 5792
Jun 26 20:06:17 kernel: module: cdc_wdm bf526000 7252
Jun 26 20:06:17 kernel: module: cdc_ncm bf51e000 8762
Jun 26 20:06:17 kernel: module: rndis_host bf517000 5256
Jun 26 20:06:17 kernel: module: cdc_ether bf511000 4036
Jun 26 20:06:17 kernel: module: asix bf509000 10856
Jun 26 20:06:17 kernel: module: cdc_acm bf500000 12614
Jun 26 20:06:17 kernel: module: usbnet bf4f7000 11900
Jun 26 20:06:17 kernel: module: mii bf4f1000 3367
Jun 26 20:06:17 kernel: module: ohci_hcd bf4e7000 17926
Jun 26 20:06:17 kernel: module: ehci_hcd bf4d9000 32382
Jun 26 20:06:17 kernel: module: xhci_hcd bf4c6000 51132
Jun 26 20:06:17 kernel: module: usbcore bf4a2000 102572
Jun 26 20:06:17 kernel: module: jffs2 bf484000 91274
Jun 26 20:06:17 kernel: module: zlib_deflate bf47a000 19489
Jun 26 20:06:17 kernel: module: nf_nat_pptp bf474000 1602
Jun 26 20:06:17 kernel: module: nf_conntrack_pptp bf46e000 3355
Jun 26 20:06:17 kernel: module: nf_nat_proto_gre bf468000 887
Jun 26 20:06:17 kernel: module: nf_conntrack_proto_gre bf462000 3296
Jun 26 20:06:17 kernel: module: nf_nat_ftp bf45c000 1144
Jun 26 20:06:17 kernel: module: nf_conntrack_ftp bf455000 4909
Jun 26 20:06:17 kernel: module: wl bf033000 4136173
Jun 26 20:06:17 kernel: module: et bf01c000 64930
Jun 26 20:06:17 kernel: module: igs bf014000 11887
Jun 26 20:06:17 kernel: module: emf bf00b000 15225
Jun 26 20:06:17 kernel: module: ctf bf000000 21079
Jun 26 20:06:17 kernel: Modules linked in: usblp thfsplus tntfs(P) tfat(P) ext2 ext4 crc16 jbd2 ext3 jbd mbcache usb_storage sg sd_mod scsi_wait_scan scsi_mod cdc_mbim qmi_wwan cdc_wdm cdc_ncm rndis_host cdc_ether asix cdc_acm usbnet mii ohci_hcd ehci_hcd xhci_hcd usbcore jffs2 zlib_deflate nf_nat_pptp nf_conntrack_pptp nf_nat_proto_gre nf_conntrack_proto_gre nf_nat_ftp nf_conntrack_ftp wl(P) et(P) igs(P) emf(P) ctf(P)
Jun 26 20:06:17 kernel: [<c0043ff8>] (unwind_backtrace+0x0/0xf8) from [<c0061d70>] (warn_slowpath_common+0x4c/0x64)
Jun 26 20:06:17 kernel: [<c0061d70>] (warn_slowpath_common+0x4c/0x64) from [<c0061da4>] (warn_slowpath_null+0x1c/0x24)
Jun 26 20:06:17 kernel: [<c0061da4>] (warn_slowpath_null+0x1c/0x24) from [<bf02550c>] (fa_process_tx+0x188/0x194 [et])
Jun 26 20:06:17 kernel: [<bf02550c>] (fa_process_tx+0x188/0x194 [et]) from [<bf0265f8>] (et_isr+0x2fc/0x488 [et])
Jun 26 20:06:17 kernel: unwind: Index not found bf0265f8
Jun 26 20:06:17 kernel: ---[ end trace ba036d0a7a9af421 ]---

 

[Kruton]

Same issue on my AC87U. Device is not able to boot in AP mode using last 2 releases of Merlin (384.12 and 384.13). Latest release where AP mode is working is 384.11_2. Tried factory reset, switch to DD-WRT and back. Nothing helped.

Can devs investigate this issue, please?

 

[Brihut]

I"m running into the same issue. Has any progress been made? Anything I may do to help this along?

 

[EspHack]

i thought it was just normal that the thing takes like 5 minutes to apply a simple wifi setting, and reboots like 3 times while doing so