because of an issue with the stock firmware I tried the current snapshot (r10766-3032bf7f89) on a TP-Link Archer C6 v2 EU yesterday.
It turned out that the 5Ghz Wifi drops after several hours of working flawlessly.
The syslog contained this message:
executable path /usr/sbin/wpad does not match process path ()
The wifi is shown as unassigned in the webinterface and the SSID is no longer broadcasted.
(I just flashed again and lost syslog, but I can post more from the syslog once this happens again).
In order to get Wifi working again I wanted to revert to the stock firmware which seems to be not possible. Does anyone have experience with this model and could please help me with this?
What I did so far (as there is not much doc/posts on this model I will give more detail):
Installing OpenWrt in the OEM web UI did not work as the file failed the check.
TFTP method worked:
- PC LAN interface set to 192.168.0.66, subnet mask 255.255.255.0, gateway 192.168.0.1, connect to LAN1 on router
- Installed tftpd-hpa (Linux Mint), started service, renamed and copied openwrt bin to
- Keep reset button pressed on router, switch router on, wait till all lights flash up, release button (tcpdump on PC can be used to observe transfer)
The following steps worked according to the generic docs (ssh, install luci, etc.). In my case installing the package
luci-ssl-opensslmade the GUI unresponsive as ui.js would constantly fail to query endpoints. Maybe it helps to use a properly signed certificate but it seems better to not install this package on a first time installation.
Wifi was enabled using all default settings, except SSIDs, encryption (WPA2), cipher (CCMP/TKIP)
2.4Ghz works fine, 5Ghz drops after some hours. See error message described initially.
I assumed that something might be broken in a snapshot version but my bigger problem is that it's impossible to revert to the original firmware.
I downloaded the firmware release 2019-02-20 I had installed before from here:
I followed the same procedure that worked for openwrt using TFTP.
This results in the router not booting up after flashing: just the power LED lights up, can't ping or connect on 192.168.0.1 or 192.168.1.1, DHCP not working.
Same with the older stock firmware.
I also tried to flash in Luci and using the CLI
sysupgrade, which both require forcing (-F) the update and result in the router not booting anymore.
As far as I understood stripping parts of the .bin file is not needed if the image does not include a boot partition but I am not sure about that.
Fortunately, flashing openwrt worked each time.
I would very much appreciate any help on how to install the original firmware again and/or on how to get 5Ghz Wifi running stable.
Thanks in advance!