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I've recently been experiencing interference and lag whenever I simultaneously connect Bluetooth and Wi-Fi using my RTL8852CE card (using rtw89 kernel module) in my laptop. This appears to be a recent development though I can't precisely track when it started. Is there anything I could use to fix this?
I've checked online through many different forum posts etc, but none of them seemed applicable or relevant.
One idea that seemed like it might be the issue is that apparently the chipset supports multiple antennas but the kernel module can't recognise if the inbuilt card has them leading to coex issues: https://bbs.archlinux.org/viewtopic.php?id=208472
This is however a different card, so I don't know how applicable it might be. Also the fix described relies on a patched version that apparently got merged, so shouldn't be an issue anymore…
Most of the methods seem to say simply turning off coex should work, though that only seemed to be said for the iwlwifi driver, and I can't quite reconstruct how that might be possible to achieve with rtw89. Also if possible I would like to be able to use both at the same time as currently I have to switch off one to use the other in any reliable way, which is far less than ideal and afaik switching off coex would only make this automatic/forced.
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Same here.
So I finally did a little digging... and downgrading linux to 6.11.9 (from 6.12.8) fixes the issue. The upgrade to 6.12 happened just around the time the problem started (Nov 23), but I don't remember precisely enough to be sure.
6.12 also uses a newer firmware version in addition to other driver updates, so not clear to me if it is the kernel code or the firmware.
There also appear to be some patches in 6.13 that mention bluetooth vs wifi priority, so I am hopeful a fix is already on its way, but I haven't tried, yet.
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That's good to hear, I thought I'd checked older kernel versions and had the issue there as well, but booting with the lts kernel just now seems to fix it for me too, lets hope those patches in 6.13 fix it on the stable kernel...
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6.13 has not fixed it for me, currently using the lts kernel seems to be the only way I can fix this. Does anyone have any more tips to address this?
From my very rudimentary understanding it looks like this is addressing the issue, right? https://lore.kernel.org/linux-wireless/ … 7db8b775fc
I also can't find what version that would be in, would that land in 6.14 or a 6.13.x release? (afaik the numbers are meaningless anyway, right?)
Last edited by 0815 (2025-02-04 12:49:45)
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I've had problems with realtek devices too a long time ago, but the drivers weren't in mainline. If you don't want to do the diff yourself and patch it I recommend you file a bug report and wait till it the fix hits mainline. It shouldn't take long, wait for 6.14 then upgrade and it should be fixed.
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Thanks! I'd rather not do the diff myself and get into kernel patching, esp as my computer is not particularly powerful so compiling would take years, so would I send in the bug report to bugzilla.kernel.org right? (side note: https://bugzilla.kernel.org/show_bug.cgi?id=217782 seems like it's fairly similar, but it's over a year old and a different, though similar device?)
Last edited by 0815 (2025-02-26 11:53:12)
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Hey guys, did you got any solution?
I am using the same controller with 6.13.8-arch1-1. For me the problem is that WIFi randomly drops and the range is really poor. Also, when downloading, the bluetooth mouse or headset stops working... It is really annoying and I can no longer use bluetooth devices together with my wifi...
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Sadly the only "solution" I've found is wired internet, which is far less than ideal.
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Sorry for beating a dead horse but moving from the LTS kernel to Stable resolved my issue.
Last edited by peace885 (2025-04-21 16:43:35)
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I want to add: I am currently on the stable 6.14.4 with the same wireless device and I am experiencing issues of wifi dropping randomly, bluetooth connections dropping when wifi is under stress. So moving to stable does not resolve the issue for me.
EDIT: installing newer driver from AUR https://aur.archlinux.org/packages/rtw89-dkms-git fixed the issue for me
Last edited by egerhether (2025-04-30 10:30:59)
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