[OnePlus 5 Guides, News, & Discussion] muken:
Thanks for a great guide. The only step I did different was to save the data from /sdcard on an OTG USB drive since I had 100GB+ of data stored on the internal storage (/sdcard).

One thing that seems to be a problem for me is that WiFi Tethering is not working after the upgrade to Oreo. When I say not working I mean the status icon does not even lit up when activated. When I try to activate it WiFi is turned off as it should, but tethering never gets active...

I get some info from the logcat, however I don't know how it looked before upgrading to Oreo since it just worked and there was no need for debugging.

* Does anyone else get this problem?

* Is there a way to clear the just the WiFi Tethering settings without doing a factory reset?

Here is a log dump when turning on WiFi Tethering. NOTE that I've turned off WPA2 just for debugging purposes.

03-10 23:51:49.741 1410 1935 D HalDeviceManager: getAllChipInfo
03-10 23:51:49.741 973 973 D QCSDK : qsapsetSoftap, softap, setsoftap, 7
03-10 23:51:49.741 973 973 D QCSDK : ARG: 1 - softap
03-10 23:51:49.741 973 973 D QCSDK : ARG: 2 - setsoftap
03-10 23:51:49.741 973 973 D QCSDK : ARG: 3 - wlan0
03-10 23:51:49.741 973 973 D QCSDK : ARG: 4 - mymobile
03-10 23:51:49.741 973 973 D QCSDK : ARG: 5 - visible
03-10 23:51:49.741 973 973 D QCSDK : ARG: 6 - 1
03-10 23:51:49.741 973 973 D QCSDK : ARG: 7 - open
03-10 23:51:49.741 973 973 D QCSDK : CMD INPUT [set interface=wlan0][255]
03-10 23:51:49.742 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.742 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.742 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.742 973 973 E QCSDK : Cmd: interface Argument :wlan0
03-10 23:51:49.742 973 973 D QCSDK : cmd=interface, Val:wlan0, INI:0
03-10 23:51:49.742 1410 1935 D HalDeviceManager: getChipIds=[0]
03-10 23:51:49.743 973 973 D QCSDK : Updated:interface=wlan0
03-10 23:51:49.743 973 973 D QCSDK :
03-10 23:51:49.744 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.744 973 973 D QCSDK : len :7
03-10 23:51:49.744 973 973 D QCSDK :
03-10 23:51:49.744 973 973 D QCSDK : CMD INPUT [set ssid=gurkmobile2][7]
03-10 23:51:49.744 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.744 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.744 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.744 973 973 E QCSDK : Cmd: ssid Argument :gurkmobile2
03-10 23:51:49.746 973 973 D QCSDK : cmd=ssid, Val:gurkmobile2, INI:0
03-10 23:51:49.747 973 973 D QCSDK : Updated:ssid=gurkmobile2
03-10 23:51:49.747 973 973 D QCSDK :
03-10 23:51:49.752 973 973 D QCSDK : CMD OUTPUT [succes]
03-10 23:51:49.752 973 973 D QCSDK : len :6
03-10 23:51:49.752 973 973 D QCSDK :
03-10 23:51:49.752 973 973 D QCSDK : CMD INPUT [set ignore_broadcast_ssid=0][255]
03-10 23:51:49.752 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.752 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.753 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.753 973 973 E QCSDK : Cmd: ignore_broadcast_ssid Argument :0
03-10 23:51:49.753 973 973 D QCSDK : cmd=ignore_broadcast_ssid, Val:0, INI:0
03-10 23:51:49.753 973 973 D QCSDK : Updated:ignore_broadcast_ssid=0
03-10 23:51:49.753 973 973 D QCSDK :
03-10 23:51:49.756 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.756 973 973 D QCSDK : len :7
03-10 23:51:49.756 973 973 D QCSDK :
03-10 23:51:49.757 973 973 D QCSDK : CMD INPUT [set channel=1][255]
03-10 23:51:49.757 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.757 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.757 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.757 973 973 E QCSDK : Cmd: channel Argument :1
03-10 23:51:49.757 973 973 D QCSDK : cmd=channel, Val:1, INI:0
03-10 23:51:49.757 973 973 D QCSDK : Updated:channel=1
03-10 23:51:49.757 973 973 D QCSDK :
03-10 23:51:49.758 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.758 973 973 D QCSDK : len :7
03-10 23:51:49.758 973 973 D QCSDK :
03-10 23:51:49.758 973 973 D QCSDK : CMD INPUT [set security_mode=0][255]
03-10 23:51:49.758 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.758 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.758 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.758 973 973 E QCSDK : Cmd: security_mode Argument :0
03-10 23:51:49.767 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.767 973 973 D QCSDK : len :7
03-10 23:51:49.767 973 973 D QCSDK :
03-10 23:51:49.767 973 973 D QCSDK : CMD INPUT [set security_mode=0][255]
03-10 23:51:49.767 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.767 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.767 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.767 973 973 E QCSDK : Cmd: security_mode Argument :0
03-10 23:51:49.777 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.777 973 973 D QCSDK : len :7
03-10 23:51:49.777 973 973 D QCSDK :
03-10 23:51:49.777 973 973 D QCSDK : CMD INPUT [set security_mode=0][255]
03-10 23:51:49.777 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.777 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.777 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.777 973 973 E QCSDK : Cmd: security_mode Argument :0
03-10 23:51:49.785 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.785 973 973 D QCSDK : len :7
03-10 23:51:49.785 973 973 D QCSDK :
03-10 23:51:49.785 973 973 D QCSDK : CMD INPUT [set commit][255]
03-10 23:51:49.785 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.786 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.786 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.786 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.786 973 973 D QCSDK : len :7
03-10 23:51:49.786 973 973 D QCSDK :
03-10 23:51:49.786 973 973 D QCSDK : CMD INPUT [ set ctrl_interface=/data/misc/wifi/hostapd/ctrl][255]
03-10 23:51:49.786 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.accept to 0660: Operation not permitted
03-10 23:51:49.786 973 973 E QCSDK : Error changing permissions of /data/misc/wifi/hostapd.deny to 0660: Operation not permitted
03-10 23:51:49.786 973 973 E QCSDK : INI FILE PROP NOT PRESENT: Use default path (null)
03-10 23:51:49.786 973 973 E QCSDK : Cmd: ctrl_interface Argument :/data/misc/wifi/hostapd/ctrl
03-10 23:51:49.786 973 973 D QCSDK : cmd=ctrl_interface, Val:/data/misc/wifi/hostapd/ctrl, INI:0
03-10 23:51:49.786 973 973 D QCSDK : Updated:ctrl_interface=/data/misc/wifi/hostapd/ctrl
03-10 23:51:49.786 973 973 D QCSDK :
03-10 23:51:49.787 973 973 D QCSDK : CMD OUTPUT [success]
03-10 23:51:49.787 973 973 D QCSDK : len :7
03-10 23:51:49.787 973 973 D QCSDK :
03-10 23:51:49.791 1410 1934 D SoftApManager: Soft AP is started
03-10 23:51:49.806 22701 22701 E hostapd : Configuration file: /data/misc/wifi/hostapd.conf
03-10 23:51:49.807 22701 22701 I hostapd : Line 47: DEPRECATED: 'dump_file' configuration variable is not used anymore
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.accept' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 172: Failed to read accept_mac_file '/data/hostapd/hostapd.accept'
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.deny' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 173: Failed to read deny_mac_file '/data/hostapd/hostapd.deny'
03-10 23:51:49.797 22701 22701 W hostapd : type=1400 audit(0.0:73767): avc: denied { read } for name="hostapd.accept" dev="sda13" ino=1441794 scontext=u:r:hostapd:s0 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=0
03-10 23:51:49.797 22701 22701 W hostapd : type=1400 audit(0.0:73768): avc: denied { read } for name="hostapd.deny" dev="sda13" ino=1441795 scontext=u:r:hostapd:s0 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=0
03-10 23:51:49.806 22701 22701 E hostapd : Configuration file: /data/misc/wifi/hostapd.conf
03-10 23:51:49.807 22701 22701 I hostapd : Line 47: DEPRECATED: 'dump_file' configuration variable is not used anymore
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.accept' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 172: Failed to read accept_mac_file '/data/hostapd/hostapd.accept'
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.deny' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 173: Failed to read deny_mac_file '/data/hostapd/hostapd.deny'
03-10 23:51:49.821 22701 22701 I hostapd : rfkill: Cannot open RFKILL control device
03-10 23:51:49.822 22701 22701 E hostapd : mkdir[ctrl_interface]: Permission denied
03-10 23:51:49.822 22701 22701 E hostapd : Failed to setup control interface for wlan0
03-10 23:51:49.822 22701 22701 E hostapd : wlan0: Unable to setup interface.
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: interface state UNINITIALIZED->DISABLED
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: AP-DISABLED
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: CTRL-EVENT-TERMINATING
03-10 23:51:49.822 22701 22701 E hostapd : hostapd_free_hapd_data: Interface wlan0 wasn't started
03-10 23:51:49.822 22701 22701 I hostapd : nl80211: deinit ifname=wlan0 disabled_11b_rates=0
03-10 23:51:49.807 22701 22701 W hostapd : type=1400 audit(0.0:73769): avc: denied { write } for name="hostapd" dev="sda13" ino=1769613 scontext=u:r:hostapd:s0 tcontext=u:object_r:wpa_socket:s0 tclass=dir permissive=0
03-10 23:51:49.807 22701 22701 I hostapd : Line 47: DEPRECATED: 'dump_file' configuration variable is not used anymore
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.accept' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 172: Failed to read accept_mac_file '/data/hostapd/hostapd.accept'
03-10 23:51:49.807 22701 22701 E hostapd : MAC list file '/data/hostapd/hostapd.deny' not found.
03-10 23:51:49.807 22701 22701 E hostapd : Line 173: Failed to read deny_mac_file '/data/hostapd/hostapd.deny'
03-10 23:51:49.821 22701 22701 I hostapd : rfkill: Cannot open RFKILL control device
03-10 23:51:49.822 22701 22701 E hostapd : mkdir[ctrl_interface]: Permission denied
03-10 23:51:49.822 22701 22701 E hostapd : Failed to setup control interface for wlan0
03-10 23:51:49.822 22701 22701 E hostapd : wlan0: Unable to setup interface.
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: interface state UNINITIALIZED->DISABLED
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: AP-DISABLED
03-10 23:51:49.822 22701 22701 I hostapd : wlan0: CTRL-EVENT-TERMINATING
03-10 23:51:49.822 22701 22701 E hostapd : hostapd_free_hapd_data: Interface wlan0 wasn't started
03-10 23:51:49.822 22701 22701 I hostapd : nl80211: deinit ifname=wlan0 disabled_11b_rates=0

I've tried to remove the /data/misc/wifi/hostapd.conf file, but it is just re created again from the configuration in the Android settings.

The content of /data/misc/wifi

OnePlus5:/data/misc/wifi # ls -al
total 208
drwxrwx--- 5 wifi wifi 4096 2018-03-10 23:53 .
drwxrwx--t 56 system misc 4096 1970-09-08 16:09 ..
-rw------- 1 system system 8660 2018-03-10 23:51 WifiConfigStore.xml
-rw-rw---- 1 system wifi 21 2018-03-10 23:53 entropy.bin
drwxrwx--- 2 wifi wifi 4096 2018-02-28 15:03 hostapd
-rw-rw---- 1 system wifi 220 2017-07-01 23:53 hostapd.accept
-rw-rw---- 1 wifi wifi 43134 2018-03-10 23:51 hostapd.conf
-rw-rw---- 1 system wifi 90 2017-07-01 23:53 hostapd.deny
-rw------- 1 root root 5 2018-03-10 23:51 hostapd.pid
-rw-rw---- 1 wifi wifi 284 2018-03-10 23:53 p2p_supplicant.conf
drwxrwx--- 2 wifi wifi 4096 2018-03-10 23:53 sockets
-rw------- 1 system system 29 2018-03-10 23:41 softap.conf
drwxrwx--- 2 wifi wifi 4096 1970-01-01 02:06 wpa_supplicant
-rw-rw---- 1 wifi wifi 81 2018-03-04 12:43 wpa_supplicant.conf