AdBlock causes usb0 to go down once in a while (LTE)

Installing and Using OpenWrt Network and Wireless Configuration
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This is a continuation of this topic. (Creating this new topic because the problem is now related to AdBlock)

I tried both adblock and adblock-fast. After any of these Adblock runs for about 10 hours, the built-in USB modem gets disconnected with no logs related to the USB itself or from Adblock (please refer to the other topic for a complete idea of the logs).

Device Model: TOZED ZLT S12 PRO
Snapshot Version: 23.05.2 (r23630-842932a63d)
Kernal Version: 5.15.137
Total Device Memory: 256MB
Used about 70MB without Adblock enabled, and 100-150MB with Adblock enabled.

I'm no expert on this topic, but what could be the trigger for the usb0 going down?

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This could be power related issue. With adblock turned on, modem device is not receiving enough power to maintain connection. Only after adblock is off, that extra power released by that is enough to keep the connection alive.

I would try again with powered usb hub and see if anything changes.

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It's a built in modem.

But a bigger power adapter might help.

4

Currently, the router is powered by 12V-2A, how big could help the modem?

5

Who knows, I'd try 3A, it's a 50% increase.

Might not even be an issue with the amount of power provided, but the quality of it.

6

The adblock-fast:

  1. Does not actually run for 10 hours, it preps the block-list for dnsmasq/smartdns/unbound and exits.
  2. Does not log anything outside of the short start/stop sequences.

I'd test the adblock-fast with the smallest block-list (which is pretty much like not using adblocking at all) to test the hypothesis of any correlation of using adblocking and losing the USB modem.

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I tested with this list: https://cdn.jsdelivr.net/gh/hoshsadiq/adblock-nocoin-list/hosts.txt (10.89KiB). The problem persists, I guess it is most likely the power problem as @Alpha1096 mentioned. I'll try upgrading my power adapter and keep you guys posted :slight_smile:

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Hi, can u tell me what LTE bands active in ur S12 pro and whether you have CA working in openwrt?

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Currently, I'm connected to band 40 (only one is active). and I'm not sure about what you meant by CA!

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CA=carrier aggregation

I have SLT 4G, and I dont have CA working, even though SLT say CA is active for my tower/cell

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CA is negotiated between the modem and the carrier, the host system is not involved.

Maybe try switching/allowing bands using modemband.

And please create a new topic regarding the problem you are facing with CA.

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It looks like the issue lies with the DNS resolver. After testing dnsmasq and smartdns, the problem persisted. However, after installing unbound, I haven't noticed any issues with usb0 going down in the last 24 hours. So, installing unbound seems to have resolved the problem. I'm curious about the specific differences that unbound introduces compared to other resolvers.

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