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lwfinger / rtl8723bu

Driver for RTL8723BU
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Wifi interface twice for kernel 4.4.0-138.164 #118

Closed shade-belisar closed 5 years ago

shade-belisar commented 5 years ago

LInux Mint 18.1 XFCE

When upgrading from kernel version 4.4.0-53.74 to 4.4.0-138.164, I noticed that it shows the Wifi interface twice. I can generally connect, but get timeouts often. If I disconnect and then reconnect, networking works again for a short time. Reverting to 4.4.0-53.74 removed the second interface again.

lwfinger commented 5 years ago

I have no idea what Mint changed between 4.4.0-53 and 4.4.0-138. Does Mint provide a git repo containing all their changes so that you could bisect to find the exact change that introduces the error?

shade-belisar commented 5 years ago

I'm using Linux Mint (Ubuntu Edition), so that should be the normal Ubuntu repo on launchpad. The error appears when upgrading from 4.4.0-53.74 to 4.4.0-138.164.

I am not familiar with launchpad, but it should be possible to find all changes occuring from 53.73 to 138.164. If I can help out with any logs or traces I will gladly do so.

lwfinger commented 5 years ago

As you are the one with the problem, it will be up to you to find the cause.

javlada commented 5 years ago

@Adrian-Bielefeldt I have the same problem as you on my Kubuntu. There were other people reporting the same. It seems to be a general *ubuntu problem and unfortunately there is no solution AFAIK.

shade-belisar commented 5 years ago

@javlada While trying to learn how to increment my kernel version, a user in this thread on forums.linuxmint.org proposed to comment out this line in the Makefile, so change it from EXTRA_CFLAGS += -DCONFIG_CONCURRENT_MODE to #EXTRA_CFLAGS += -DCONFIG_CONCURRENT_MODE and rebuild the driver. This worked for me.

I do not know what this option does or if I loose any features disabling it, but at least my wifi is stable (and shows only one interface).

lwfinger commented 5 years ago

That option creates two "concurrent" interfaces. Usually one is used for a station and the second for an AP. If you have trouble with stability, then disabling that feature is reasonable.