stylus – Touchscreen gets disabled when I put the palm on screen

I wanted to ask specifically about palm rejection. Actually I wanted to write some notes on my new ‘Android’ tablet. I don’t have an active stylus nor do I want to buy one. But I found that some apps have software-based palm rejection.

I tried them and found that it was working only when I kept my palm very lightly on the screen. So, I did some touch testing and found that the screen isn’t registering any touch when I keep the palm completely on the screen. I am very sure that this the cause for the palm rejection to not work

So basically, when I keep the palm very lightly on the screen, it detects as one giant touch point, but if I keep the palm just like I keep on paper, then the entire screen becomes non-functional.

Please tell me a solution. Is there some option in setting that is turned on or is it not possible to fix this?

cryptography – Can ISP or anyone else see ANY data about file that i’m downloading over TOR (JS disabled)?


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sitemap in google search console showing "see index coverage" link disabled

In Google Search Console I observed that "See Index Coverage" is disabled.

also it is not indexing 2 post from last 20-30 days

what i have tried is

delete existing sitemap and added new with same name.

Check this image

unity – Model missed by both EventSystem.current.RaycastAll and IPointerClickHandler unless disabled and re-enabled in the Editor

I have a situation where a model is ignored in favour of one behind it. The rear model is returned by EventSystem.current.RaycastAll, and the front model’s IPointerClickHandler callback isn’t triggered if the rear model is present. The rear model does not implement IPointerClickHandler (or pointer up/down handlers, etc). Both these things work on the front model if the rear model isn’t there.

Debugging shows that the Raycast is only returning one result. By comparing behaviour when the rear model is and isn’t present, I can verify that the distance value in the RaycastResult is greater when hitting the rear model than when hitting the front model.

I can “fix” the problem by using the Inspector to disable and re-enable the front model.

Here’s the problem and the “fix” in action:

enter image description here

Higher quality version here.

EventSystem.current.RaycastAll is used to power the tooltips, and IPointerClickHandler is (unsurprisingly) used to get the cube model to react to clicks.

Unity version: 2020.3.11f1

Unity: Model missed by both EventSystem.current.RaycastAll and IPointerClickHandler unless disabled and re-enabled in the Editor

I have a situation where a model is ignored in favour of one behind it. The rear model is returned by EventSystem.current.RaycastAll, and the front model’s IPointerClickHandler callback isn’t triggered if the rear model is present. The rear model does not implement IPointerClickHandler (or pointer up/down handlers, etc). Both these things work on the front model if the rear model isn’t there.

Debugging shows that the Raycast is only returning one result. By comparing behaviour when the rear model is and isn’t present, I can verify that the distance value in the RaycastResult is greater when hitting the rear model than when hitting the front model.

I can “fix” the problem by using the Inspector to disable and re-enable the front model.

You can find a video of the problem and “fix” in action here: https://imgur.com/a/Oku79iB

EventSystem.current.RaycastAll is used to power the tooltips, and IPointerClickHandler is (unsurprisingly) used to get the cube model to react to clicks.

Unity version: 2020.3.11f1

windows 10 – Microphone permanently disabled on MSI Prestige 15

A friend of mine has a very specific problem. She muted her laptop with the built-in mute button on her laptop’s keyboard which has since broken. She is now using an external keyboard that has no such button. Is there a way to unmute the microphone? I’m thinking it is either some mute functionality already built into Windows, in which case, how does she access that functionality without the keyboard? Or it is a hardware thing, in which case, is there any way to unmute it?

MySQL 5.7 won’t restart, even without Apparmor disabled on Ubuntu 18.04

After a server restart, while MySQL shows to be running, it’s totally inaccessible and everything i’ve tried to do to rectify hasn’t resolved the issue.

I’m going to try to make this has easy to read as possible, without missing any details. I’ve been battling this for two days now.

Server Setup:

  • Ubuntu 18.04.2 LTS
  • MySQL 5.7.27

Important Contants:

  • I have not updated any software/packages since the start of this process
  • MySQL has ran absolutely fine for many many years with this setup
  • All MySQL configs are written into the files to ensure they load on restart
  • MySQL always starts on server boot.
  • There is plenty of space on the server
  • This is not a big database (maybe 1GB).
  • This is not a high-traffic server (maybe 5-10 users at once max).
  • Memory is not depleted and there is plenty of swap available too.

After debugging some fairly simple coding issues, I decided to restart the server, mainly because it hadn’t been restarted in over a year and thought it would be a good idea to clear out all the old stuff that might be hanging around.

The first restart was fairly routine. I use Google Cloud Platform and have learned from past experience to always manually shut down mysql before restarting via GCP’s dashboard. So I ran, as root, service mysql stop and waited for it to shut down (maybe 30 seconds). I then proceeded to Stop, and then Start the Compute Engine from GCP’s dashboard. This took quite a long time, but expected, so there was no panic. I’ve known it to take up to 1 hour at times (i’m running a tiny f1-micro and have been doing so successfully with this database for a few years now).

When the server finally came back, while all the services were running, mysql wasn’t accessible whatsoever. If I tried to connect via my website, MySQL Workbench or even directly in shell as root, it was hang and timeout. With only ‘timeout’ errors.

The strangest part about it was when I tried to connect as root via shell simply typing mysql, it would hang, then it would go to the mysql prompt, but this seemed to be caused by a restart every 15 minutes due to the service not starting correctly.

I tried doing a few more restarts of the server as mentioned above in hope it would ‘fix itself’…nope.

I tried manually stopped and starting MySQL, using service mysql stop and service mysql start. This was also interesting. The commands would take many minutes to complete, even though I could see mysqld running in top and syslog and mysql’s error log showing that it’s running. I would eventually get a timeout/failed message back.

So, I decided that maybe MySQL was hanging because it was doing some sort of InnoDB recovery of some sort as I have seen this before. I made sure that the database had stopped successfully, and then renamed the ib_logfile, which I believe MySQL users on startup to keep the database up-to-date upon shutdown->restart. I then cycled MySQL as mentioned above, still the same result. Upon looking closing into the syslog, I noticed some mention of apparmor not having permissions. Which leads us to Chatper 4…

AppArmor was new to me. I didn’t recall this being a part of anything before. Researching the apparmor errors I received, I came across a number of stackoverflow posts talking about editing the apparmor profile to give it access. So, I went for it and while that fixed those errors, it eventually got to an error I could not figure out how to resolve:

 kernel: (11834.156430) audit: type=1400 audit(1623157780.551:136): apparmor="DENIED" operation="capable" profile="/usr/sbin/mysqld" pid=5245 comm="mysqld" capability=2  capname="dac_read_search"

Therefore, I decided to look at a way to remove AppArmor from the equation (https://askubuntu.com/questions/1144497/how-to-disable-apparmor-for-mysql). Still no improvement.

So here I am, stuck and exhausted all the avenues I can find without totally uninstall and re-installing the database, which I don’t want to do.

My mysql error.log always looks like this:


2021-06-08T17:55:41.591752Z 0 (Warning) TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2021-06-08T17:55:41.594058Z 0 (Note) /usr/sbin/mysqld (mysqld 5.7.27-0ubuntu0.18.04.1-log) starting as process 10299 ...
2021-06-08T17:55:41.599049Z 0 (Note) InnoDB: PUNCH HOLE support available
2021-06-08T17:55:41.599326Z 0 (Note) InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-06-08T17:55:41.599401Z 0 (Note) InnoDB: Uses event mutexes
2021-06-08T17:55:41.599453Z 0 (Note) InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2021-06-08T17:55:41.599502Z 0 (Note) InnoDB: Compressed tables use zlib 1.2.11
2021-06-08T17:55:41.599557Z 0 (Note) InnoDB: Using Linux native AIO
2021-06-08T17:55:41.599909Z 0 (Note) InnoDB: Number of pools: 1
2021-06-08T17:55:41.600093Z 0 (Note) InnoDB: Using CPU crc32 instructions
2021-06-08T17:55:41.616337Z 0 (Note) InnoDB: Initializing buffer pool, total size = 64M, instances = 1, chunk size = 64M
2021-06-08T17:55:41.621572Z 0 (Note) InnoDB: Completed initialization of buffer pool
2021-06-08T17:55:41.635534Z 0 (Note) InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-06-08T17:55:41.767140Z 0 (Note) InnoDB: Highest supported file format is Barracuda.
2021-06-08T17:55:42.359183Z 0 (Note) InnoDB: Creating shared tablespace for temporary tables
2021-06-08T17:55:42.359441Z 0 (Note) InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-06-08T17:55:42.483637Z 0 (Note) InnoDB: File './ibtmp1' size is now 12 MB.
2021-06-08T17:55:42.484566Z 0 (Note) InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2021-06-08T17:55:42.484586Z 0 (Note) InnoDB: 32 non-redo rollback segment(s) are active.
2021-06-08T17:55:42.484960Z 0 (Note) InnoDB: Waiting for purge to start
2021-06-08T17:55:42.535229Z 0 (Note) InnoDB: 5.7.27 started; log sequence number 556158661
2021-06-08T17:55:42.535816Z 0 (Note) Plugin 'FEDERATED' is disabled.
2021-06-08T17:55:42.536173Z 0 (Note) InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2021-06-08T17:55:42.680632Z 0 (Warning) Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key
2021-06-08T17:55:42.680966Z 0 (Note) Server hostname (bind-address): '127.0.0.1'; port: 3306
2021-06-08T17:55:42.681085Z 0 (Note)   - '127.0.0.1' resolves to '127.0.0.1';
2021-06-08T17:55:42.681173Z 0 (Note) Server socket created on IP: '127.0.0.1'.
2021-06-08T17:55:42.995012Z 0 (Note) InnoDB: Buffer pool(s) load completed at 210608 17:55:42
2021-06-08T18:11:12.650489Z 0 (Note) Event Scheduler: Loaded 0 events
2021-06-08T18:11:12.659131Z 0 (Note) /usr/sbin/mysqld: ready for connections.
Version: '5.7.27-0ubuntu0.18.04.1-log'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu)
2021-06-08T18:11:12.707920Z 0 (Note) Giving 5 client threads a chance to die gracefully
2021-06-08T18:11:12.708094Z 0 (Note) Shutting down slave threads
2021-06-08T18:11:12.766810Z 0 (Note) Forcefully disconnecting 0 remaining clients
2021-06-08T18:11:12.766993Z 0 (Note) Event Scheduler: Purging the queue. 0 events
2021-06-08T18:11:12.767159Z 0 (Note) Binlog end
2021-06-08T18:11:12.768176Z 0 (Note) Shutting down plugin 'auth_socket'
2021-06-08T18:11:12.768328Z 0 (Note) Shutting down plugin 'ngram'
2021-06-08T18:11:12.768388Z 0 (Note) Shutting down plugin 'partition'
2021-06-08T18:11:12.768441Z 0 (Note) Shutting down plugin 'BLACKHOLE'
2021-06-08T18:11:12.768492Z 0 (Note) Shutting down plugin 'ARCHIVE'
2021-06-08T18:11:12.768535Z 0 (Note) Shutting down plugin 'PERFORMANCE_SCHEMA'
2021-06-08T18:11:12.768609Z 0 (Note) Shutting down plugin 'MRG_MYISAM'
2021-06-08T18:11:12.768653Z 0 (Note) Shutting down plugin 'MyISAM'
2021-06-08T18:11:12.768699Z 0 (Note) Shutting down plugin 'INNODB_SYS_VIRTUAL'
2021-06-08T18:11:12.768744Z 0 (Note) Shutting down plugin 'INNODB_SYS_DATAFILES'
2021-06-08T18:11:12.768786Z 0 (Note) Shutting down plugin 'INNODB_SYS_TABLESPACES'
2021-06-08T18:11:12.768828Z 0 (Note) Shutting down plugin 'INNODB_SYS_FOREIGN_COLS'
2021-06-08T18:11:12.768871Z 0 (Note) Shutting down plugin 'INNODB_SYS_FOREIGN'
2021-06-08T18:11:12.768914Z 0 (Note) Shutting down plugin 'INNODB_SYS_FIELDS'
2021-06-08T18:11:12.768956Z 0 (Note) Shutting down plugin 'INNODB_SYS_COLUMNS'
2021-06-08T18:11:12.768997Z 0 (Note) Shutting down plugin 'INNODB_SYS_INDEXES'
2021-06-08T18:11:12.769041Z 0 (Note) Shutting down plugin 'INNODB_SYS_TABLESTATS'
2021-06-08T18:11:12.769083Z 0 (Note) Shutting down plugin 'INNODB_SYS_TABLES'
2021-06-08T18:11:12.769125Z 0 (Note) Shutting down plugin 'INNODB_FT_INDEX_TABLE'
2021-06-08T18:11:12.769166Z 0 (Note) Shutting down plugin 'INNODB_FT_INDEX_CACHE'
2021-06-08T18:11:12.769208Z 0 (Note) Shutting down plugin 'INNODB_FT_CONFIG'
2021-06-08T18:11:12.769250Z 0 (Note) Shutting down plugin 'INNODB_FT_BEING_DELETED'
2021-06-08T18:11:12.769300Z 0 (Note) Shutting down plugin 'INNODB_FT_DELETED'
2021-06-08T18:11:12.769342Z 0 (Note) Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD'
2021-06-08T18:11:12.769384Z 0 (Note) Shutting down plugin 'INNODB_METRICS'
2021-06-08T18:11:12.769426Z 0 (Note) Shutting down plugin 'INNODB_TEMP_TABLE_INFO'
2021-06-08T18:11:12.769486Z 0 (Note) Shutting down plugin 'INNODB_BUFFER_POOL_STATS'
2021-06-08T18:11:12.769553Z 0 (Note) Shutting down plugin 'INNODB_BUFFER_PAGE_LRU'
2021-06-08T18:11:12.769596Z 0 (Note) Shutting down plugin 'INNODB_BUFFER_PAGE'
2021-06-08T18:11:12.769638Z 0 (Note) Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET'
2021-06-08T18:11:12.769683Z 0 (Note) Shutting down plugin 'INNODB_CMP_PER_INDEX'
2021-06-08T18:11:12.769725Z 0 (Note) Shutting down plugin 'INNODB_CMPMEM_RESET'
2021-06-08T18:11:12.769766Z 0 (Note) Shutting down plugin 'INNODB_CMPMEM'
2021-06-08T18:11:12.769807Z 0 (Note) Shutting down plugin 'INNODB_CMP_RESET'
2021-06-08T18:11:12.769849Z 0 (Note) Shutting down plugin 'INNODB_CMP'
2021-06-08T18:11:12.769892Z 0 (Note) Shutting down plugin 'INNODB_LOCK_WAITS'
2021-06-08T18:11:12.769933Z 0 (Note) Shutting down plugin 'INNODB_LOCKS'
2021-06-08T18:11:12.769975Z 0 (Note) Shutting down plugin 'INNODB_TRX'
2021-06-08T18:11:12.770017Z 0 (Note) Shutting down plugin 'InnoDB'
2021-06-08T18:11:12.770349Z 0 (Note) InnoDB: FTS optimize thread exiting.
2021-06-08T18:11:12.770596Z 0 (Note) InnoDB: Starting shutdown...
2021-06-08T18:11:12.871037Z 0 (Note) InnoDB: Dumping buffer pool(s) to /var/lib/mysql/ib_buffer_pool
2021-06-08T18:11:12.878360Z 0 (Note) InnoDB: Buffer pool(s) dump completed at 210608 18:11:12
2021-06-08T18:11:14.577043Z 0 (Note) InnoDB: Shutdown completed; log sequence number 556158689
2021-06-08T18:11:14.585803Z 0 (Note) InnoDB: Removed temporary tablespace data file: "ibtmp1"
2021-06-08T18:11:14.585996Z 0 (Note) Shutting down plugin 'MEMORY'
2021-06-08T18:11:14.586054Z 0 (Note) Shutting down plugin 'CSV'
2021-06-08T18:11:14.586108Z 0 (Note) Shutting down plugin 'sha256_password'
2021-06-08T18:11:14.586161Z 0 (Note) Shutting down plugin 'mysql_native_password'
2021-06-08T18:11:14.636915Z 0 (Note) Shutting down plugin 'binlog'
2021-06-08T18:11:14.715404Z 0 (Note) /usr/sbin/mysqld: Shutdown complete

2021-06-08T18:11:16.187617Z 0 (Warning) TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2021-06-08T18:11:16.190347Z 0 (Note) /usr/sbin/mysqld (mysqld 5.7.27-0ubuntu0.18.04.1-log) starting as process 10533 ...
2021-06-08T18:11:16.195635Z 0 (Note) InnoDB: PUNCH HOLE support available
2021-06-08T18:11:16.195881Z 0 (Note) InnoDB: Mutexes and rw_locks use GCC atomic builtins
2021-06-08T18:11:16.195946Z 0 (Note) InnoDB: Uses event mutexes
2021-06-08T18:11:16.195999Z 0 (Note) InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2021-06-08T18:11:16.196080Z 0 (Note) InnoDB: Compressed tables use zlib 1.2.11
2021-06-08T18:11:16.196136Z 0 (Note) InnoDB: Using Linux native AIO
2021-06-08T18:11:16.196604Z 0 (Note) InnoDB: Number of pools: 1
2021-06-08T18:11:16.196855Z 0 (Note) InnoDB: Using CPU crc32 instructions
2021-06-08T18:11:16.231010Z 0 (Note) InnoDB: Initializing buffer pool, total size = 64M, instances = 1, chunk size = 64M
2021-06-08T18:11:16.258135Z 0 (Note) InnoDB: Completed initialization of buffer pool
2021-06-08T18:11:16.279826Z 0 (Note) InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2021-06-08T18:11:16.407111Z 0 (Note) InnoDB: Highest supported file format is Barracuda.
2021-06-08T18:11:16.779664Z 0 (Note) InnoDB: Creating shared tablespace for temporary tables
2021-06-08T18:11:16.779986Z 0 (Note) InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2021-06-08T18:11:16.899999Z 0 (Note) InnoDB: File './ibtmp1' size is now 12 MB.
2021-06-08T18:11:16.900886Z 0 (Note) InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2021-06-08T18:11:16.900908Z 0 (Note) InnoDB: 32 non-redo rollback segment(s) are active.
2021-06-08T18:11:16.901270Z 0 (Note) InnoDB: Waiting for purge to start
2021-06-08T18:11:16.951472Z 0 (Note) InnoDB: 5.7.27 started; log sequence number 556158689
2021-06-08T18:11:16.952148Z 0 (Note) Plugin 'FEDERATED' is disabled.
2021-06-08T18:11:16.952543Z 0 (Note) InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2021-06-08T18:11:17.062344Z 0 (Warning) Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key
2021-06-08T18:11:17.062517Z 0 (Note) Server hostname (bind-address): '127.0.0.1'; port: 3306
2021-06-08T18:11:17.062588Z 0 (Note)   - '127.0.0.1' resolves to '127.0.0.1';
2021-06-08T18:11:17.062714Z 0 (Note) Server socket created on IP: '127.0.0.1'.
2021-06-08T18:11:17.332974Z 0 (Note) InnoDB: Buffer pool(s) load completed at 210608 18:11:17

My Syslog now looks like this:

un  8 17:39:22 instance-1 systemd(1): Starting MySQL Community Server...
Jun  8 17:45:32 instance-1 systemd(1): Started Session 73 of user davidburleson.
Jun  8 17:49:22 instance-1 systemd(1): mysql.service: Start operation timed out. Terminating.
Jun  8 17:55:40 instance-1 systemd(1): mysql.service: Failed with result 'timeout'.
Jun  8 17:55:41 instance-1 systemd(1): Failed to start MySQL Community Server.
Jun  8 17:55:41 instance-1 systemd(1): mysql.service: Service hold-off time over, scheduling restart.
Jun  8 17:55:41 instance-1 systemd(1): mysql.service: Scheduled restart job, restart counter is at 2.
Jun  8 17:55:41 instance-1 systemd(1): Stopped MySQL Community Server.
Jun  8 17:55:41 instance-1 systemd(1): Starting MySQL Community Server...
Jun  8 18:05:41 instance-1 systemd(1): mysql.service: Start operation timed out. Terminating.
Jun  8 18:08:06 instance-1 snapd(947): storehelpers.go:551: cannot refresh: snap has no updates available: "core", "core18", "google-cloud-sdk"
Jun  8 18:09:02 instance-1 CRON(10391): (root) CMD (  ( -x /usr/lib/php/sessionclean ) && if ( ! -d /run/systemd/system ); then /usr/lib/php/sessionclean; fi)
Jun  8 18:09:39 instance-1 systemd(1): Starting Clean php session files...
Jun  8 18:10:51 instance-1 systemd(1): Started Clean php session files.
Jun  8 18:11:14 instance-1 systemd(1): mysql.service: Failed with result 'timeout'.
Jun  8 18:11:15 instance-1 systemd(1): Failed to start MySQL Community Server.
Jun  8 18:11:15 instance-1 systemd(1): mysql.service: Service hold-off time over, scheduling restart.
Jun  8 18:11:15 instance-1 systemd(1): mysql.service: Scheduled restart job, restart counter is at 3.
Jun  8 18:11:15 instance-1 systemd(1): Stopped MySQL Community Server.
Jun  8 18:11:15 instance-1 systemd(1): Starting MySQL Community Server...
Jun  8 18:21:16 instance-1 systemd(1): mysql.service: Start operation timed out. Terminating.

Every time I try running as root mysql, service mysql start, service mysql stop, service mysql status and even the mysqladmin and direct /etc/init.d/mysql commands, they all hang until timeout.

What else might I be missing?

windows 10 – My Bluetooth is disabled and I cannot re-enable it

So I usually use my headphones for audio but recently bought the BT Wireless CSR4.0 dongle to connect ym Marshmallow speaker to my pc. It worked for about 10 minutes then it cut out. Since then my pc won’t let me connect or remove my speaker, saying “bluetooth is disabled”. I also no longer have the slider in my settings to toggle bluetooth, AND the bluetooth option is gone from my notifications centre.
I have tried countless fixes: updating drivers, deleting my bluetooth drivers and rebooting for the reinstall, and yes even turning it off and on again. So far, nada.
Every forum I check has a hundred more different solutions for this issue so right now I’m lost as to what I should do. Any ideas? Because its pretty bullsh*t that mid-spotify sesh my bluetooth decides to commit seppuku on me….

18.04 – My Wifi is disabled after /usr/bin/sudo must be owned by uid 0 and have the setuid bit set

command i run: sudo lshw -C network
*-network
description: Ethernet interface
product: Ethernet Connection I217-LM
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eno1
version: 04
serial: ec:f4:bb:2a:17:8b
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.13-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:34 memory:f7c00000-f7c1ffff memory:f7c3d000-f7c3dfff ioport:f080(size=32)
*-network DISABLED
description: Wireless interface
product: Centrino Advanced-N 6235 // this is my wifi internal adapter
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 24
serial: c4:d9:87:a6:64:9a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-74-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:38 memory:f7b00000-f7b01fff
*-network:0 DISABLED
description: Wireless interface // this is my external wifi adapter
physical id: 2
bus info: usb@3:3
logical name: wlx6466b31b9a20
serial: 64:66:b3:1b:9a:20
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rt2800usb driverversion=5.4.0-74-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11
*-network:1
description: Ethernet interface
physical id: 3
logical name: enp0s20u6
serial: 2a:40:63:b9:13:8f
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.170.40 link=yes multicast=yes

My Laptop is:
Dell latitude e6440.
ubuntu 18.04 installed.

The problem is this that my wifi is not working after I reset sudo from ubuntu recovery using following commands.

mount -o remount,rw /

mount –all

chown root:root /usr/bin/sudo

chmod 4755 /usr/bin/sudo

restart.

please help me to fix my wifi problem. and there is another problem my software & update application in ubuntu 18.04 is also not working.