RE: wifi: rtw89: rtw8922ae: HWSI bus lockup during RF recalibration on AP bandwidth change

[Ping-Ke Shih <pkshih@realtek.com>]

Jeffrey Wälti <jeffrey@waelti.dev> wrote:
> 
> Ping-Ke Shih <pkshih@realtek.com> wrote:
> 
> > Jeffrey Wälti <jeffrey@waelti.dev> wrote:
> > >
> > > <pkshih@realtek.com> wrote:
> > >
> > > >
> > > > Please try to disable power save and ASPM by
> > > > 1) iw wlan0 set power_save off
> 
> I'm sorry, this is my first time interacting with the mailing list and I overlooked the other instructions.
> It seems like disabling power save gets rid of the issue of Wi-Fi timeouts. I haven't been able to
> reproduce the issue with `iw wlan0 set power_save off` yet, even without any of the other fixes on kernel
> 6.19.10 and 7.0-rc6.
> 
> > > > 2) reference and install
> > > https://github.com/lwfinger/rtw89/blob/main/70-rtw89.conf
> > > >    and then cold reboot.
> >
> > Have you tested with these conditions?
> 
> Using this patch eliminates the issue of Bluetooth devices disconnecting, when switching between
> networks.
> 
> > [...]
> >
> > > >
> > > > Please help to test the latest kernel 7.0-rc with additional patch [1].
> > > >
> > > > [1]
> > > https://lore.kernel.org/linux-wireless/20260310080146.31113-4-pkshih@realtek
> > > .com/
> >
> > Have you also applied this patch?
> 
> I tested kernel 7.0-rc6 with this patch applied on top for ~1 day now and haven't been able to reproduce,
> even with power save enabled. However, it is a bit difficult to reliably trigger the issue as it seems
> to trigger more on certain networks than others etc.
> 
> > > >
> > > > Ping-Ke
> > > >
> > > >
> > >
> > > Thank you for coming back to me so quickly, I just encountered the same thing
> > > with kernel 7.0-rc5.
> > >
> >
> > Please confirm my questions above.
> >
> > Ping-Ke
> >
> >
> 
> In summary:
> - Disabling power save seems to stop the timeouts but Bluetooth issues remain
> - Disabling ASPM features fixes the Bluetooth issue
> - kernel 7.0-rc6 with the additional patch fixes Wi-Fi timeouts but not the Bluetooth disconnects
> 
> I hope that answers your questions.

It looks like additional patch can fix the WiFi timeouts problem, and
disabling ASPM feature can fix Bluetooth issue. I think you can keep
(2) + (3) setting as workaround.

I'd talk with BT coexistence team internally to figure out the cause
of Bluetooth disconnection. 

Ping-Ke