Realtek RTL8723BU doesn't work well in ubuntu

[Roque]

I have one laptop with Realtek RTL8723BU wifi card. It runs, but signal is weak (it only works if the router is less than a meter away), and even if it gets signal it's slow and it gets interrupted frequently. In windows it works normally, and with a much stronger signal. I tested it on Ubuntu 18.04.3 and 19.04.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1846140/+editstatus and add the package name in the text box next to the word Package.

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[Roque (roquejose2000-6)]

I think it's related to that package, although it could also be related to the kernel.

[Till Kamppeter (till-kamppeter)]

For me it looks more like a kernel issue, as the Wi-Fi principally works (network-manager must have set it up correctly). The weak signal issue looks more like something in the driver.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1846140

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Kai-Heng Feng (kaihengfeng)]

This may fix the issue:
https://<email address hidden>/

[Roque (roquejose2000-6)]

Is the fix on the link a patch proposed for the kernel? Sorry, I don't understand.

[Kai-Heng Feng (kaihengfeng)]

It's in linux-next but not in mainline yet.

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a9bb0b51577835d26054d080c59935be8b7e44f4

[Roque (roquejose2000-6)]

Thanks, hope it will be added to mainline soon.

[Roque (roquejose2000-6)]

Do you know if the fix is in mainline now? Thanks.

[Kai-Heng Feng (kaihengfeng)]

Yes, it's in v5.5-rc1 now.

[Roque (roquejose2000-6)]

Thank you.

[SB (lumumba)]

RTL8723bu is slow again on my laptop there seems to be a regression, was working fine before recent Kernelupdate.