WiFi dropping with channel switch and not reconnecting: how to debug

Since a few days my new Samsung Galaxy A50 (running Pie build PPR1.180610.011.A505FNXXU1ASD6) is dropping the WiFi connection to my router (Fr!tzBox 7940) for no clear reason. I’ve been trying all the suggestions I found on the web:

  1. Changing DNS/disabling PiHole (as I have/had one), as somebody with a Pihole experienced the same issue here: didn’t solve it.
  2. Disabling IPv6 on the router: didn’t solve it.
  3. Using a static IP address for the device: didn’t solve it.
  4. Reset the network settings on the device: didn’t solve it.
  5. Factory reset the device… a lot of work… didn’t solve it.

The funny thing is that the phone is the only device experiencing issues. We also have a Samsung Tab (gen1), Tab S3, S7, multiple HP laptops and a Tanix TX6 that experience no issues at all! … I am expecting radio issues.

Every time this occurs, I need to disable and re-enable the Wifi of the A50 to get a connection again. Sometimes it even lists my router, but just doesn’t (automatically) connect. enter image description here Sometimes it even lists no Wifi sources at all! Even though I should see the weak signal from the neighbors: it’s quite busy here enter image description here Sometimes I don’t even get the WiFi to enable!!

The logging apps I found don’t tell me much. E.g. the app “WiFi monitor” logs this (translated):

2019-05-16 17:20:06 WiFi is switched on. WiFi network is connected: "FRITZ!Box 7490". RSSI: -52 dBm 2019-05-16 17:20:08 WiFi is switched on. WiFi network is connected: "FRITZ!Box 7490". RSSI: -48 dBm 2019-05-16 17:20:46 WiFi is switched on. Connecting to WiFi network… 2019-05-16 17:20:46 WiFi is switched on. No connected WiFi networks [3 minuted later I find out and manually intervene] 2019-05-16 17:23:51 WiFi is switched on. No connected WiFi networks 2019-05-16 17:52:05 WiFi is being switched off 2019-05-16 17:52:05 WiFi is switched off 2019-05-16 17:52:08 WiFi is being switched on 2019-05-16 17:52:09 WiFi is switched on. No connected WiFi networks 2019-05-16 17:52:11 WiFi is switched on. Connecting to WiFi network… 2019-05-16 17:52:11 WiFi is switched on. WiFi network is connected: "FRITZ!Box 7490" 2019-05-16 17:52:11 WiFi is switched on. WiFi network is connected: "FRITZ!Box 7490". RSSI: -54 dBm 2019-05-16 17:52:12 WiFi is switched on. WiFi network is connected: "FRITZ!Box 7490". RSSI: -56 dBm 

My router also has some logs indicating that in some cases it might be related to channel switching:

16.05.19 17:52:13 New wireless device registered itself (5 GHz), 433 Mbit/s, Galaxy-A50, IP 192.168.178.97, MAC [cut]. 16.05.19 17:52:11 Wireless LAN device registered: Reactivating wireless LAN at full power (5 GHz). 16.05.19 17:25:57 Wireless auto channel: The channel settings (previously channel 52 (5 GHz)) were changed; now active on channel 36 (5 GHz). 16.05.19 17:25:51 Wireless auto channel: Current detection of the wireless LAN environment (5 GHz) in progress, in order to optimize the wireless channels in use; some wireless devices may be re-registered. 16.05.19 17:23:50 No more wireless LAN devices registered: Reducing power consumption (5 GHz). 16.05.19 17:20:52 Wireless device was deregistered (5 GHz), Galaxy-A50, IP 192.168.178.97, MAC [cut]. 16.05.19 17:20:03 Reregistered wireless device (5 GHz): Automatic change of wireless band to improve data transmission, Galaxy-A50, IP 192.168.178.97, MAC [cut]. 16.05.19 17:20:03 Wireless device registered (5 GHz), 433 Mbit/s, Galaxy-A50, IP 192.168.178.97, MAC [cut]. 16.05.19 17:20:01 Wireless LAN device registered: Reactivating wireless LAN at full power (5 GHz). 16.05.19 17:19:58 Wireless device was deregistered (2,4 GHz), Galaxy-A50, IP 192.168.178.97, MAC [cut]. 

I’m trying to find a way for android to tell me why it is dropping the wifi and not reconnecting. Any tips?

Reaching Shannon capacity of a channel

Suppose I have the following from alphabet $ \mathcal{X} = \{0 ,1\}$ to $ \mathcal{Y} = \{0 ,1\}$ . The channel simply does

\begin{align} 0 \rightarrow 0&\quad \text{with probability 1} \ 1 \rightarrow 0&\quad \text{with probability 1/2}\ 1 \rightarrow 1&\quad \text{with probability 1/2} \end{align}

The classical capacity of this channel is given by the mutual information between the input register, $ X$ and output register $ Y$ maximized over input probability distributions, $ p(x)$ . That is,

$ $ C = \max_{p(x)} H(Y) – H(Y|X)$ $

The appropriate distribution turns out to be $ (0.6, 0.4)$ and the capacity is $ 0.3219$ bits.

How does one actually use this result to practically communicate (in the asymptotic limit) over this channel at this rate? Does it mean that I should use input codewords that obey these statistics over the input alphabet for example?

How do you archive a private channel on Slack (e.g. a personal private channel)?

I am trying to archive (download all msgs, data etc… | backup) a 2 private channels: one of my personal private chat with myself.. and one with another member (DM).

I have only found tutorials for archiving a public channel not a private one, but have seen answers that would suggest that arching a private channel is possible: Deleting/Make private channel public?

HQ Channel Promotion Fully Safe Via Real User for $1

50 Non Drop HQ YouTube Channel Subs Hello,I am expert on Social Media Marketing service.Always, I complete my work honestly and quickly. 3000 project Completed To 500+ Positive Seller Rating Quality Of My Services 1)Get Professional service with extra bonus. 2)Fast Delivery. 3)100% Money back Guarantee. 4)Life Time Support. 5)SATISFACTION GUARANTEED. 6)Works process manual Right method. 7)Safe and satisfaction guarantee. Note -Orders Will Start Instant If I Am Online Then Otherwise All Orders Must Complete In 24 Hours.

by: expertseller1
Created: —
Category: Social Networks
Viewed: 373


Hide all recommended videos and channel on homepage in YouTube

How to hide all recommended videos and channels on homepage in YouTube? It used to be easy, I changed something in settings, and I closed new channel recommendations whenever they appeared, and my home page was nice and clean.

Apparently Google changed an algorithm, and closing recommendations doesn’t help any more.

I’ve tried to find and apply filters I found in the internet, but it seems like they are outdated.