D-Link DSL2750B brcmsmac WiFi dropout

Installing and Using OpenWrt
1

For my sister, I invested in a cheapy D-Link DSL_2750B T1 router, given the information at https://openwrt.org/toh/hwdata/d-link/d-link_dsl-2750b_t1

Quoted driver support for the Broadcom BCM43225 WiFi chip is b43, brcmsmac

The b43 driver turned-out to be a bust, yielding only 80211b/g modes.

I installed brcmsmac, but it no much luck. As a WiFi access point I can connect to the router, yet the connection will inexplicably, periodically drop-out. That's with a good signal on any client.

I've tried every conceivable Luci setting with no improvement.

There doesn't appear to be any hints as to a problem in dmesg:

root@OpenWrt:~# dmesg | grep wlan0
[   71.542132] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   74.548732] br-lan: port 2(wlan0) entered blocking state
[   74.554290] br-lan: port 2(wlan0) entered disabled state
[   74.560434] device wlan0 entered promiscuous mode
[   74.565522] br-lan: port 2(wlan0) entered blocking state
[   74.571040] br-lan: port 2(wlan0) entered forwarding state

Any clues, anyone? Not sure how to diagnose this issue.

T.

2

did you notice the warning at the top of the page you linked to ?

1 Like
3

I looked at a great many routers before deciding on the DSL2750B. I avoided all the ones that had listed an explicitly stated warning that 80211n modes weren't supported, and went with the one that said WiFi: 80211b/g/n.

The warning you are referring to appeared between when I shopped the router, and when I came to install OpenWRT.

It has 80211n, and it works, but periodically disconnects.

I was hoping for some diagnostic assistance.

4

then I guess you must have owned the router for quite some time, because the box was added in Jan 2018, according to the change log.

5

Well I'm wrong then. Any more 'assistance'?

6

sure, the support will be dropped after 23.05 is EOL, due to insufficient flash space.

https://openwrt.org/supported_devices/864_warning

7

Congratulations!

8

not my b-day today, but thank you.

9

Well, that was unpleasurable...and unproductive.

10

I understand that this interaction hasn't been particularly friendly, and I'm sorry for that experience.

That said, on a factual basis, it is true that your device is only barely supported now, and will be dropped in the next major release due to the limitations on the flash memory and RAM.

If you use a DSL connection, you may want to opt for a standalone DSL modem and then use a more recent router that has higher performance, better specifications/resources, and will have continued support within OpenWrt.

The hardware section of the forum is a great place to discuss your specific requirements and ask questions, and you can use the table of hardware and the firmware selector to learn about the different devices and if they are supported.

11

How do I close the account. I'm absolutely irked by your subscribers, and want zero to do with such 'helpful' individuals.

Will you close and delete the account for me?

Treasured experience.