Re: [BUG] wifi: rtw88: Hard system freeze on RTL8821CE when power_save is enabled (LPS/ASPM conflict)

[LB F]

Ping-Ke Shih <pkshih@xxxxxxxxxxx> wrote:
> Not sure what hardware get wrong. Let's validate rate when reading
> from hardware.

Hi Ping-Ke,

One additional observation while monitoring logs with your rate
validation patch installed.

During normal usage with Wi-Fi connected and a Bluetooth A2DP device
connecting to the system, the following message appeared in dmesg:

  [180.420000] rtw_8821ce 0000:13:00.0: unused phy status page (11)

Looking at rtw_rx_fill_phy_info() in rx.c, this message is emitted
when the firmware sends a PHY status report with a page number that
the driver does not recognize. In this case page 11 appeared at the
moment the Bluetooth device was establishing its connection.

We have not observed any stability issues or connectivity drops
associated with this message -- the driver appears to handle it
gracefully by ignoring it. We are not sure whether this is related
to the rate=0x65 issue or is simply a separate artifact of BT/Wi-Fi
coexistence on this chip. We wanted to mention it in case it is
useful context.

Best regards,
Oleksandr Havrylov